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Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull networking fixes from David Miller:
"A little more than usual this time around. Been travelling, so that is
part of it.
Anyways, here are the highlights:
1) Deal with memcontrol races wrt. listener dismantle, from Eric
Dumazet.
2) Handle page allocation failures properly in nfp driver, from Jaku
Kicinski.
3) Fix memory leaks in macsec, from Sabrina Dubroca.
4) Fix crashes in pppol2tp_session_ioctl(), from Guillaume Nault.
5) Several fixes in bnxt_en driver, including preventing potential
NVRAM parameter corruption from Michael Chan.
6) Fix for KRACK attacks in wireless, from Johannes Berg.
7) rtnetlink event generation fixes from Xin Long.
8) Deadlock in mlxsw driver, from Ido Schimmel.
9) Disallow arithmetic operations on context pointers in bpf, from
Jakub Kicinski.
10) Missing sock_owned_by_user() check in sctp_icmp_redirect(), from
Xin Long.
11) Only TCP is supported for sockmap, make that explicit with a
check, from John Fastabend.
12) Fix IP options state races in DCCP and TCP, from Eric Dumazet.
13) Fix panic in packet_getsockopt(), also from Eric Dumazet.
14) Add missing locked in hv_sock layer, from Dexuan Cui.
15) Various aquantia bug fixes, including several statistics handling
cures. From Igor Russkikh et al.
16) Fix arithmetic overflow in devmap code, from John Fastabend.
17) Fix busted socket memory accounting when we get a fault in the tcp
zero copy paths. From Willem de Bruijn.
18) Don't leave opt->tot_len uninitialized in ipv6, from Eric Dumazet"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (106 commits)
stmmac: Don't access tx_q->dirty_tx before netif_tx_lock
ipv6: flowlabel: do not leave opt->tot_len with garbage
of_mdio: Fix broken PHY IRQ in case of probe deferral
textsearch: fix typos in library helpers
rxrpc: Don't release call mutex on error pointer
net: stmmac: Prevent infinite loop in get_rx_timestamp_status()
net: stmmac: Fix stmmac_get_rx_hwtstamp()
net: stmmac: Add missing call to dev_kfree_skb()
mlxsw: spectrum_router: Configure TIGCR on init
mlxsw: reg: Add Tunneling IPinIP General Configuration Register
net: ethtool: remove error check for legacy setting transceiver type
soreuseport: fix initialization race
net: bridge: fix returning of vlan range op errors
sock: correct sk_wmem_queued accounting on efault in tcp zerocopy
bpf: add test cases to bpf selftests to cover all access tests
bpf: fix pattern matches for direct packet access
bpf: fix off by one for range markings with L{T, E} patterns
bpf: devmap fix arithmetic overflow in bitmap_size calculation
net: aquantia: Bad udp rate on default interrupt coalescing
net: aquantia: Enable coalescing management via ethtool interface
...
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If an Ethernet PHY is initialized before the interrupt controller it is
connected to, a message like the following is printed:
irq: no irq domain found for /interrupt-controller@e61c0000 !
However, the actual error is ignored, leading to a non-functional (POLL)
PHY interrupt later:
Micrel KSZ8041RNLI ee700000.ethernet-ffffffff:01: attached PHY driver [Micrel KSZ8041RNLI] (mii_bus:phy_addr=ee700000.ethernet-ffffffff:01, irq=POLL)
Depending on whether the PHY driver will fall back to polling, Ethernet
may or may not work.
To fix this:
1. Switch of_mdiobus_register_phy() from irq_of_parse_and_map() to
of_irq_get().
Unlike the former, the latter returns -EPROBE_DEFER if the
interrupt controller is not yet available, so this condition can be
detected.
Other errors are handled the same as before, i.e. use the passed
mdio->irq[addr] as interrupt.
2. Propagate and handle errors from of_mdiobus_register_phy() and
of_mdiobus_register_device().
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
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of_fwnode_graph_get_port_parent()
Using CONFIG_OF_DYNAMIC=y uncovered an imbalance in the usecount of the
node being passed to of_fwnode_graph_get_port_parent(). Preserve the
usecount by using of_get_parent() instead of of_get_next_parent() which
don't decrement the usecount of the node passed to it.
Fixes: 3b27d00e7b6d7c88 ("device property: Move fwnode graph ops to firmware specific locations")
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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There are two types of memory reservations firmware can ask the kernel
to make in the device tree: static and dynamic.
See Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
If you have greater than 16 entries in /reserved-memory (as we do on
POWER9 systems) you would get this scary looking error message:
[ 0.000000] OF: reserved mem: not enough space all defined regions.
This is harmless if all your reservations are static (which with OPAL on
POWER9, they are).
It is not harmless if you have any dynamic reservations after the 16th.
In the first pass over the fdt to find reservations, the child nodes of
/reserved-memory are added to a static array in of_reserved_mem.c so that
memory can be reserved in a 2nd pass. The array has 16 entries. This is why,
on my dual socket POWER9 system, I get that error 4 times with 20 static
reservations.
We don't have a problem on ppc though, as in arch/powerpc/kernel/prom.c
we look at the new style /reserved-ranges property to do reservations,
and this logic was introduced in 0962e8004e974 (well before any powernv
system shipped).
A Google search shows up no occurances of that exact error message, so we're
probably safe in that no machine that people use has memory not being reserved
when it should be.
The simple fix is to bump the length of the array to 32 which "should be
enough for everyone(TM)". The simple fix of not recording static allocations
in the array would cause problems for devices with "memory-region" properties.
A more future-proof fix is likely possible, although more invasive and this
simple fix is perfectly suitable in the meantime while a more future-proof
fix is developed.
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Tested-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Do not strdup() console options. It seems that the only reason for
it to be strdup()-ed was a compilation warning: printk, UART and
console drivers, for some reason, expect char pointer instead of
const char pointer. So we can just pass `of_stdout_options', but
need to cast it to char pointer. A better fix would be to change
printk, console drivers and UART to accept const char `options';
but that will take time - there are lots of drivers to update.
The patch also fixes a possible memory leak: add_preferred_console()
can fail, but we don't kfree() options.
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Pull dma-mapping updates from Christoph Hellwig:
- removal of the old dma_alloc_noncoherent interface
- remove unused flags to dma_declare_coherent_memory
- restrict OF DMA configuration to specific physical busses
- use the iommu mailing list for dma-mapping questions and patches
* tag 'dma-mapping-4.14' of git://git.infradead.org/users/hch/dma-mapping:
dma-coherent: fix dma_declare_coherent_memory() logic error
ARM: imx: mx31moboard: Remove unused 'dma' variable
dma-coherent: remove an unused variable
MAINTAINERS: use the iommu list for the dma-mapping subsystem
dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags
dma-coherent: remove the DMA_MEMORY_INCLUDES_CHILDREN flag
of: restrict DMA configuration
dma-mapping: remove dma_alloc_noncoherent and dma_free_noncoherent
i825xx: switch to switch to dma_alloc_attrs
au1000_eth: switch to dma_alloc_attrs
sgiseeq: switch to dma_alloc_attrs
dma-mapping: reduce dma_mapping_error inline bloat
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree updates from Rob Herring:
"There's a few orphans in the conversion to %pOF printf specifiers
included here that no one else picked up.
Summary:
- Convert more DT code to use of_property_read_* API.
- Improve DT overlay support when adding multiple overlays
- Convert printk's to %pOF format specifiers. Most went via subsystem
trees, but picked up the remaining orphans
- Correct unittests to use preferred "okay" for "status" property
value
- Add a KASLR seed property
- Vendor prefixes for Mellanox, Theobroma System, Adaptrum, Moxa
- Fix modalias buffer handling
- Clean-up of include paths for building dtbs
- Add bindings for amc6821, isl1208, tsl2x7x, srf02, and srf10
devices
- Add nvmem bindings for MediaTek MT7623 and MT7622 SoC
- Add compatible string for Allwinner H5 Mali-450 GPU
- Fix links to old OpenFirmware docs with new mirror on
devicetree.org
- Remove status property from binding doc examples"
* tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (45 commits)
devicetree: Adjust status "ok" -> "okay" under drivers/of/
dt-bindings: Remove "status" from examples
dt-bindings: pinctrl: sh-pfc: Use generic node name
dt-bindings: Add vendor Mellanox
dt-binding: net/phy: fix interrupts description
virt: Convert to using %pOF instead of full_name
macintosh: Convert to using %pOF instead of full_name
ide: pmac: Convert to using %pOF instead of full_name
microblaze: Convert to using %pOF instead of full_name
dt-bindings: usb: musb: Grammar s/the/to/, s/is/are/
of: Use PLATFORM_DEVID_NONE definition
of/device: Fix of_device_get_modalias() buffer handling
of/device: Prevent buffer overflow in of_device_modalias()
dt-bindings: add amc6821, isl1208 trivial bindings
dt-bindings: add vendor prefix for Theobroma Systems
of: search scripts/dtc/include-prefixes path for both CPP and DTC
of: remove arch/$(SRCARCH)/boot/dts from include search path for CPP
of: remove drivers/of/testcase-data from include search path for CPP
of: return of_get_cpu_node from of_cpu_device_node_get if CPUs are not registered
iio: srf08: add device tree binding for srf02 and srf10
...
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Pull networking updates from David Miller:
1) Support ipv6 checksum offload in sunvnet driver, from Shannon
Nelson.
2) Move to RB-tree instead of custom AVL code in inetpeer, from Eric
Dumazet.
3) Allow generic XDP to work on virtual devices, from John Fastabend.
4) Add bpf device maps and XDP_REDIRECT, which can be used to build
arbitrary switching frameworks using XDP. From John Fastabend.
5) Remove UFO offloads from the tree, gave us little other than bugs.
6) Remove the IPSEC flow cache, from Florian Westphal.
7) Support ipv6 route offload in mlxsw driver.
8) Support VF representors in bnxt_en, from Sathya Perla.
9) Add support for forward error correction modes to ethtool, from
Vidya Sagar Ravipati.
10) Add time filter for packet scheduler action dumping, from Jamal Hadi
Salim.
11) Extend the zerocopy sendmsg() used by virtio and tap to regular
sockets via MSG_ZEROCOPY. From Willem de Bruijn.
12) Significantly rework value tracking in the BPF verifier, from Edward
Cree.
13) Add new jump instructions to eBPF, from Daniel Borkmann.
14) Rework rtnetlink plumbing so that operations can be run without
taking the RTNL semaphore. From Florian Westphal.
15) Support XDP in tap driver, from Jason Wang.
16) Add 32-bit eBPF JIT for ARM, from Shubham Bansal.
17) Add Huawei hinic ethernet driver.
18) Allow to report MD5 keys in TCP inet_diag dumps, from Ivan
Delalande.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1780 commits)
i40e: point wb_desc at the nvm_wb_desc during i40e_read_nvm_aq
i40e: avoid NVM acquire deadlock during NVM update
drivers: net: xgene: Remove return statement from void function
drivers: net: xgene: Configure tx/rx delay for ACPI
drivers: net: xgene: Read tx/rx delay for ACPI
rocker: fix kcalloc parameter order
rds: Fix non-atomic operation on shared flag variable
net: sched: don't use GFP_KERNEL under spin lock
vhost_net: correctly check tx avail during rx busy polling
net: mdio-mux: add mdio_mux parameter to mdio_mux_init()
rxrpc: Make service connection lookup always check for retry
net: stmmac: Delete dead code for MDIO registration
gianfar: Fix Tx flow control deactivation
cxgb4: Ignore MPS_TX_INT_CAUSE[Bubble] for T6
cxgb4: Fix pause frame count in t4_get_port_stats
cxgb4: fix memory leak
tun: rename generic_xdp to skb_xdp
tun: reserve extra headroom only when XDP is set
net: dsa: bcm_sf2: Configure IMP port TC2QOS mapping
net: dsa: bcm_sf2: Advertise number of egress queues
...
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull device properties framework updates from Rafael Wysocki:
"These introduce fwnode operations for all of the separate types of
'firmware nodes' that can be handled by the device properties
framework, make the framework use const fwnode arguments all over, add
a helper for the consolidated handling of node references and switch
over the framework to the new UUID API.
Specifics:
- Introduce fwnode operations for all of the separate types of
'firmware nodes' that can be handled by the device properties
framework and drop the type field from struct fwnode_handle (Sakari
Ailus, Arnd Bergmann).
- Make the device properties framework use const fwnode arguments
where possible (Sakari Ailus).
- Add a helper for the consolidated handling of node references to
the device properties framework (Sakari Ailus).
- Switch over the ACPI part of the device properties framework to the
new UUID API (Andy Shevchenko)"
* tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: device property: Switch to use new generic UUID API
device property: export irqchip_fwnode_ops
device property: Introduce fwnode_property_get_reference_args
device property: Constify fwnode property API
device property: Constify argument to pset fwnode backend
ACPI: Constify internal fwnode arguments
ACPI: Constify acpi_bus helper functions, switch to macros
ACPI: Prepare for constifying acpi_get_next_subnode() fwnode argument
device property: Get rid of struct fwnode_handle type field
ACPI: Use IS_ERR_OR_NULL() instead of non-NULL check in is_acpi_data_node()
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Tweak a small number of status "ok" lines in a single file under
/drivers/of/ to use the proper DTSpec 0.1 spelling of "okay".
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Rob Herring <robh@kernel.org>
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Moving DMA configuration to happen later at driver probe time had the
unnoticed side-effect that we now perform DMA configuration for *every*
device represented in DT, rather than only those explicitly created by
the of_platform and PCI code.
As Christoph points out, this is not really the best thing to do. Whilst
there may well be other DMA-capable buses that can benefit from having
their children automatically configured after the bridge has probed,
there are also plenty of others like USB, MDIO, etc. that definitely do
not support DMA and should not be indiscriminately processed.
The good news is that in most cases the DT "dma-ranges" property serves
as an appropriate indicator - per a strict interpretation of the spec,
anything lacking a "dma-ranges" property should be considered not to
have a mapping of DMA address space from its children to its parent,
thus anything for which of_dma_get_range() does not succeed does not
need DMA configuration. Certain bus types have a general expectation of
DMA capability and carry a well-established precedent that an absent
"dma-ranges" implies the same as the empty property, so we automatically
opt those in to DMA configuration regardless, to avoid regressing most
existing platforms.
Fixes: 09515ef5ddad ("of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices")
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Use dedicated definition instead of plain -1 where it's appropriate.
No functional change intended.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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of_device_request_module() calls of_device_get_modalias() with "len" 0,
to calculate the size of the buffer needed to store the result, but due
to integer promotion the ssize_t "len" will be compared as unsigned with
strlen(compat) and the loop will generally never break. This results in
a call to snprintf() with a negative len, which triggers below warning,
followed by a dereference of a invalid pointer:
[ 3.060067] WARNING: CPU: 0 PID: 51 at lib/vsprintf.c:2122 vsnprintf+0x348/0x6d8
...
[ 3.060301] [<ffffff800891ede8>] vsnprintf+0x348/0x6d8
[ 3.060308] [<ffffff800891f248>] snprintf+0x48/0x50
[ 3.060316] [<ffffff80086a7c80>] of_device_get_modalias+0x108/0x160
[ 3.060322] [<ffffff80086a7cf8>] of_device_request_module+0x20/0x88
...
Further more of_device_get_modalias() is supposed to return the number
of bytes needed to store the entire modalias, so the loop needs to
continue accumulate the total size even though the buffer is full.
Finally the function is not expected to ensure space for the NUL, nor
include it in the returned size, so only 1 should be added to the length
of "compat" in the loop (to account for the character 'C').
Fixes: bc575064d688 ("of/device: use of_property_for_each_string to parse compatible strings")
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
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As of_device_get_modalias() returns the number of bytes that would have
been written to the target string, regardless of how much did fit in the
buffer, it's possible that the returned index points beyond the buffer
passed to of_device_modalias() - causing memory beyond the buffer to be
null terminated.
Fixes: 0634c2958927 ("of: Add function for generating a DT modalias with a newline")
Cc: Rob Herring <robh@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
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Historically, DMA masks have suffered some ambiguity between whether
they represent the range of physical memory a device can access, or the
address bits a device is capable of driving, particularly since on many
platforms the two are equivalent. Whilst there are some stragglers left
(dma_max_pfn(), I'm looking at you...), the majority of DMA code has
been cleaned up to follow the latter definition, not least since it is
the only one which makes sense once IOMMUs are involved.
In this respect, of_dma_configure() has always done the wrong thing in
how it generates initial masks based on "dma-ranges". Although rounding
down did not affect the TI Keystone platform where dma_addr + size is
already a power of two, in any other case it results in a mask which is
at best unnecessarily constrained and at worst unusable.
BCM2837 illustrates the problem nicely, where we have a DMA base of 3GB
and a size of 1GB - 16MB, giving dma_addr + size = 0xff000000 and a
resultant mask of 0x7fffffff, which is then insufficient to even cover
the necessary offset, effectively making all DMA addresses out-of-range.
This has been hidden until now (mostly because we don't yet prevent
drivers from simply overwriting this initial mask later upon probe), but
due to recent changes elsewhere now shows up as USB being broken on
Raspberry Pi 3.
Make it right by rounding up instead of down, such that the mask
correctly correctly describes all possisble bits the device needs to
emit.
Fixes: 9a6d7298b083 ("of: Calculate device DMA masks based on DT dma-range size")
Reported-by: Stefan Wahren <stefan.wahren@i2se.com>
Reported-by: Andreas Färber <afaerber@suse.de>
Reported-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
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Now, we can use of_graph_get_remote_endpoint(). Let's use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Looks like gcc isn't always able to figure out that 3 *if* branches in
of_phy_register_fixed_link() calling fixed_phy_register() at their ends
are similar enough and thus can be merged. The "manual" merge saves 40
bytes of the object code (AArch64 gcc 4.8.5), and still saves 12 bytes
even if gcc was able to merge the branch tails (ARM gcc 4.8.5)...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The "fixed-link" prop support predated of_property_read_u32_array(), so
basically had to open-code it. Using the modern API saves 24 bytes of the
object code (ARM gcc 4.8.5); the only behavior change would be that the
prop length check is now less strict (however the strict pre-check done
in of_phy_is_fixed_link() is left intact anyway)...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Saeed Mahameed says:
====================
mlx5-shared-2017-08-07
This series includes some mlx5 updates for both net-next and rdma trees.
From Saeed,
Core driver updates to allow selectively building the driver with
or without some large driver components, such as
- E-Switch (Ethernet SRIOV support).
- Multi-Physical Function Switch (MPFs) support.
For that we split E-Switch and MPFs functionalities into separate files.
From Erez,
Delay mlx5_core events when mlx5 interfaces, namely mlx5_ib, registration
is taking place and until it completes.
From Rabie,
Increase the maximum supported flow counters.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Convert the interrupts property parsing to use the OF property API
instead of open coding the parsing of the raw property value. This saves
a number of LoC, and the result is easier to read.
Signed-off-by: Rob Herring <robh@kernel.org>
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Instead of directly parsing the compatible property, use the
of_property_for_each_string() helper to iterate over each compatible
string. This reduces the LoC and makes the functions easier to
understand.
Signed-off-by: Rob Herring <robh@kernel.org>
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Two minor conflicts in virtio_net driver (bug fix overlapping addition
of a helper) and MAINTAINERS (new driver edit overlapping revamp of
PHY entry).
Signed-off-by: David S. Miller <davem@davemloft.net>
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'asoc/fix/msm8916', 'asoc/fix/multi-pcm', 'asoc/fix/of-graph' and 'asoc/fix/pxa' into asoc-linus
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Fix inconsistent use of of_graph_get_port_parent() where
asoc_simple_card_parse_graph_dai() does of_node_get() before
calling it while other callers do not. We can fix this by
not trashing the node passed to of_graph_get_port_parent().
Let's also make sure the callers have correct refcounts and remove
related incorrect of_node_put() calls for of_for_each_phandle
as that's done by of_phandle_iterator_next() except when
we break out of the loop early.
Let's fix both issues with a single patch to avoid kobject
refcounts getting messed up more if two patches are merged
separately.
Otherwise strange issues can happen caused by memory corruption
caused by too many kobject_del() calls such as:
BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:747
...
(___might_sleep)
(__mutex_lock)
(mutex_lock_nested)
(kernfs_remove)
(kobject_del)
(kobject_put)
(of_get_next_parent)
(of_graph_get_port_parent)
(asoc_simple_card_parse_graph_dai [snd_soc_simple_card_utils])
(asoc_graph_card_probe [snd_soc_audio_graph_card])
Fixes: 0ef472a973eb ("of_graph: add of_graph_get_port_parent()")
Fixes: 2692c1c63c29 ("ASoC: add audio-graph-card support")
Fixes: 1689333f8311 ("ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai()")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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of_phy_register_fixed_link() declares the 'err' variable to hold the result
of of_property_read_string() but only uses it once after that, while that
function can be called directly from the *if* statement...
Remove that variable and move/regroup 'link_gpio' and 'len' variables in
order to sort the declarations in the reverse Xmas tree order -- to please
DaveM. ;-)
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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of_pci_get_devfn() and of_pci_parse_bus_range() somehow didn't use
of_property_read_u32_array() though it was long available, basically
open-coding it. Using the modern DT API saves several bytes and
also adds some prop sanity checks as a bonus...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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of_get_pci_domain_nr() somehow didn't use of_property_read_u32() though it
was long available, basically open-coding it. Using the modern DT API saves
several LoCs/bytes and also adds some prop sanity checks as a bonus...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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of_alias_scan() can use of_property_read_string() -- using the modern DT API
adds some prop sanity checks as a bonus; it does add couple LoCs but only
because the original code violated the 80-column limit...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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of_n_{addr|size}_cells() predate of_property_read_u32(), so they have to
basically open-code it. Using the modern DT API saves several LoCs and also
adds some prop sanity checks as a bonus...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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The new fwnode_property_get_reference_args() interface amends the fwnode
property API with the functionality of both of_parse_phandle_with_args()
and __acpi_node_get_property_reference().
The semantics is slightly different: the cells property is ignored on ACPI
as the number of arguments can be explicitly obtained from the firmware
interface.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Make fwnode arguments to the fwnode property API const.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Instead of relying on the struct fwnode_handle type field, define
fwnode_operations structs for all separate types of fwnodes. To find out
the type, compare to the ops field to relevant ops structs.
This change has two benefits:
1. it avoids adding the type field to each and every instance of struct
fwnode_handle, thus saving memory and
2. makes the ops field the single factor that defines both the types of
the fwnode as well as defines the implementation of its operations,
decreasing the possibility of bugs when developing code dealing with
fwnode internals.
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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of_irq_to_resource() has recently been fixed to return negative error #'s
along with 0, however of_irq_to_resource_table() still only regards 0 as
invalid IRQ -- fix it up.
Fixes: 7a4228bbff76 ("of: irq: use of_irq_get() in of_irq_to_resource()")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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It was never used and could be removed, otherwise
we could see a warning:
drivers/of/address.c: In function 'of_pci_range_parser_one':
drivers/of/address.c:277:14: warning: variable 'pci_space' set but not
used [-Wunused-but-set-variable]
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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The DT interrupt parsing code predates of_property_read_u32(), so it has to
basically open-code it. Using the modern DT API saves several LoCs and also
adds some prop sanity checks as a bonus...
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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The "interrupt-controller" property is boolean, i.e. has no value. The DT
interrupt parsing code predates of_property_read_bool(), so it uses either
of_get_property() or of_find_property() -- the former isn't quite correct
for the boolean props (but works somehow). Use the modern boolean prop API
instead.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Add overlay __symbols__ properties to live tree when an overlay
is added to the live tree so that the symbols are available to
subsequent overlays.
Expected test result is new __symbols__ entries for labels from
the overlay after this commit.
Before this commit:
Console error message near end of unittest:
### dt-test ### FAIL of_unittest_overlay_high_level():2296 Adding overlay 'overlay_bad_symbol' failed
### dt-test ### end of unittest - 190 passed, 1 failed
The new unittest "fails" because the expected result of loading the
new overlay is an error instead of success.
$ # node hvac-medium-2 exists because the overlay loaded
$ # since the duplicate symbol was not detected
$ cd /proc/device-tree/testcase-data-2/substation@100/
$ ls
compatible hvac-medium-2 motor-8 reg
hvac-large-1 linux,phandle name status
hvac-medium-1 motor-1 phandle
$ cd /proc/device-tree/__symbols__/
$ ls
electric_1 lights_1 name rides_1 spin_ctrl_2
hvac_1 lights_2 retail_1 spin_ctrl_1
After this commit:
Previous console error message no longer occurs, but expected error
occurs:
OF: overlay: Failed to apply prop @/__symbols__/hvac_1
OF: overlay: apply failed '/__symbols__'
### dt-test ### end of unittest - 191 passed, 0 failed
$ # node hvac-medium-2 does not exist because the overlay
$ # properly failed to load due to the duplicate symbol
$ cd /proc/device-tree/testcase-data-2/substation@100/
$ ls
compatible hvac-medium-1 motor-1 name reg
hvac-large-1 linux,phandle motor-8 phandle status
$ cd /proc/device-tree/__symbols__/
$ ls
electric_1 lights_1 retail_1 ride_200_right spin_ctrl_2
hvac_1 lights_2 ride_200 rides_1
hvac_2 name ride_200_left spin_ctrl_1
$ cat ride_200; echo
/testcase-data-2/fairway-1/ride@200
$ cat ride_200_left ; echo
/testcase-data-2/fairway-1/ride@200/track@10
$ cat ride_200_right ; echo
/testcase-data-2/fairway-1/ride@200/track@20
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Correct existing node name detection when overlay node name has
a unit-address.
Expected test result is overlay will update the nodes and properties
for /testcase-data-2/fairway-1/ride@100/ after this commit.
Before this commit:
Console error message near end of unittest:
OF: Duplicate name in fairway-1, renamed to "ride@100#1"
$ cd /proc/device-tree/testcase-data-2/fairway-1/
$ # extra node: ride@100#1
$ ls
#address-cells linux,phandle phandle ride@200
#size-cells name ride@100 status
compatible orientation ride@100#1
$ cd /proc/device-tree/testcase-data-2/fairway-1/ride@100/
$ ls track@30/incline-up
ls: track@30/incline-up: No such file or directory
$ ls track@40/incline-up
ls: track@40/incline-up: No such file or directory
After this commit:
Console error message no longer occurs
$ cd /proc/device-tree/testcase-data-2/fairway-1/
$ # no extra node: ride@100#1
$ ls
#address-cells compatible name phandle ride@200
#size-cells linux,phandle orientation ride@100 status
$ cd /proc/device-tree/testcase-data-2/fairway-1/ride@100/
$ ls track@30/incline-up
track@30/incline-up
$ ls track@40/incline-up
track@40/incline-up
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Add nodes and properties to overlay_base and overlay dts files to
test for
- incorrect existing node name detection when overlay node name
has a unit-address
- adding overlay __symbols__ properties to live tree when an
overlay is added to the live tree
The following console messages will appear near the end of unittest
until the code errors are corrected:
OF: Duplicate name in fairway-1, renamed to "ride@100#1"
### dt-test ### FAIL of_unittest_overlay_high_level():2296 Adding overlay 'overlay_bad_symbol' failed
### dt-test ### end of unittest - 190 passed, 1 failed
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.
Signed-off-by: Rob Herring <robh@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull device properties framework updates from Rafael Wysocki:
"These mostly rearrange the device properties core code and add a few
helper functions to it as a foundation for future work.
Specifics:
- Rearrange the core device properties code by moving the code
specific to each supported platform configuration framework (ACPI,
DT and build-in) into a separate file (Sakari Ailus).
- Add helper functions for accessing device properties in a
firmware-agnostic way (Sakari Ailus, Kieran Bingham)"
* tag 'devprop-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
device property: Add fwnode_graph_get_port_parent
device property: Add FW type agnostic fwnode_graph_get_remote_node
device property: Introduce fwnode_device_is_available()
device property: Move fwnode graph ops to firmware specific locations
device property: Move FW type specific functionality to FW specific files
ACPI: Constify argument to acpi_device_is_present()
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git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI updates from Bjorn Helgaas:
- add sysfs max_link_speed/width, current_link_speed/width (Wong Vee
Khee)
- make host bridge IRQ mapping much more generic (Matthew Minter,
Lorenzo Pieralisi)
- convert most drivers to pci_scan_root_bus_bridge() (Lorenzo
Pieralisi)
- mutex sriov_configure() (Jakub Kicinski)
- mutex pci_error_handlers callbacks (Christoph Hellwig)
- split ->reset_notify() into ->reset_prepare()/reset_done()
(Christoph Hellwig)
- support multiple PCIe portdrv interrupts for MSI as well as MSI-X
(Gabriele Paoloni)
- allocate MSI/MSI-X vector for Downstream Port Containment (Gabriele
Paoloni)
- fix MSI IRQ affinity pre/post/min_vecs issue (Michael Hernandez)
- test INTx masking during enumeration, not at run-time (Piotr Gregor)
- avoid using device_may_wakeup() for runtime PM (Rafael J. Wysocki)
- restore the status of PCI devices across hibernation (Chen Yu)
- keep parent resources that start at 0x0 (Ard Biesheuvel)
- enable ECRC only if device supports it (Bjorn Helgaas)
- restore PRI and PASID state after Function-Level Reset (CQ Tang)
- skip DPC event if device is not present (Keith Busch)
- check domain when matching SMBIOS info (Sujith Pandel)
- mark Intel XXV710 NIC INTx masking as broken (Alex Williamson)
- avoid AMD SB7xx EHCI USB wakeup defect (Kai-Heng Feng)
- work around long-standing Macbook Pro poweroff issue (Bjorn Helgaas)
- add Switchtec "running" status flag (Logan Gunthorpe)
- fix dra7xx incorrect RW1C IRQ register usage (Arvind Yadav)
- modify xilinx-nwl IRQ chip for legacy interrupts (Bharat Kumar
Gogada)
- move VMD SRCU cleanup after bus, child device removal (Jon Derrick)
- add Faraday clock handling (Linus Walleij)
- configure Rockchip MPS and reorganize (Shawn Lin)
- limit Qualcomm TLP size to 2K (hardware issue) (Srinivas Kandagatla)
- support Tegra MSI 64-bit addressing (Thierry Reding)
- use Rockchip normal (not privileged) register bank (Shawn Lin)
- add HiSilicon Kirin SoC PCIe controller driver (Xiaowei Song)
- add Sigma Designs Tango SMP8759 PCIe controller driver (Marc
Gonzalez)
- add MediaTek PCIe host controller support (Ryder Lee)
- add Qualcomm IPQ4019 support (John Crispin)
- add HyperV vPCI protocol v1.2 support (Jork Loeser)
- add i.MX6 regulator support (Quentin Schulz)
* tag 'pci-v4.13-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (113 commits)
PCI: tango: Add Sigma Designs Tango SMP8759 PCIe host bridge support
PCI: Add DT binding for Sigma Designs Tango PCIe controller
PCI: rockchip: Use normal register bank for config accessors
dt-bindings: PCI: Add documentation for MediaTek PCIe
PCI: Remove __pci_dev_reset() and pci_dev_reset()
PCI: Split ->reset_notify() method into ->reset_prepare() and ->reset_done()
PCI: xilinx: Make of_device_ids const
PCI: xilinx-nwl: Modify IRQ chip for legacy interrupts
PCI: vmd: Move SRCU cleanup after bus, child device removal
PCI: vmd: Correct comment: VMD domains start at 0x10000, not 0x1000
PCI: versatile: Add local struct device pointers
PCI: tegra: Do not allocate MSI target memory
PCI: tegra: Support MSI 64-bit addressing
PCI: rockchip: Use local struct device pointer consistently
PCI: rockchip: Check for clk_prepare_enable() errors during resume
MAINTAINERS: Remove Wenrui Li as Rockchip PCIe driver maintainer
PCI: rockchip: Configure RC's MPS setting
PCI: rockchip: Reconfigure configuration space header type
PCI: rockchip: Split out rockchip_pcie_cfg_configuration_accesses()
PCI: rockchip: Move configuration accesses into rockchip_pcie_cfg_atu()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree updates from Rob Herring:
- vsprintf format specifier %pOF for device_node's. This will enable us
to stop storing the full node names. Conversion of users will happen
next cycle.
- Update documentation to point to DT specification instead of ePAPR.
- Split out graph and property functions to a separate file.
- New of-graph functions for ALSA
- Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull,
Itead, and BananaPi.
- Improve dtx_diff utility filename printing.
* tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (32 commits)
of: document /sys/firmware/fdt
dt-bindings: Add RISC-V vendor prefix
vsprintf: Add %p extension "%pOF" for device tree
of: find_node_by_full_name rewrite to compare each level
of: use kbasename instead of open coding
dt-bindings: thermal: add file extension to brcm,ns-thermal
of: update ePAPR references to point to Devicetree Specification
scripts/dtc: dtx_diff - Show real file names in diff header
of: detect invalid phandle in overlay
of: be consistent in form of file mode
of: make __of_attach_node() static
of: address.c header comment typo
of: fdt.c header comment typo
of: make of_fdt_is_compatible() static
dt-bindings: display-timing.txt convert non-ascii characters to ascii
Documentation: remove overlay-notes reference to non-existent file
dt-bindings: usb: exynos-usb: Add missing required VDD properties
dt-bindings: Add vendor prefix for Linksys
MAINTAINERS: add device tree ABI documentation file
of: Add vendor prefix for iWave Systems Technologies Pvt. Ltd
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound updates from Takashi Iwai:
"This development cycle resulted in a fair amount of changes in both
core and driver sides. The most significant change in ALSA core is
about PCM. Also the support of of-graph card and the new DAPM widget
for DSP are noteworthy changes in ASoC core. And there're lots of
small changes splat over the tree, as you can see in diffstat.
Below are a few highlights:
ALSA core:
- Removal of set_fs() hackery from PCM core stuff, and the code
reorganization / optimization thereafter
- Improved support of PCM ack ops, and a new ABI for improved
control/status mmap handling
- Lots of constifications in various codes
ASoC core:
- The support of of-graph card, which may work as a better generic
device for a replacement of simple-card
- New widget types intended mainly for use with DSPs
ASoC drivers:
- New drivers for Allwinner V3s SoCs
- Ensonic ES8316 codec support
- More Intel SKL and KBL works
- More device support for Intel SST Atom (mostly for cheap tablets
and 2-in-1 devices)
- Support for Rockchip PDM controllers
- Support for STM32 I2S and S/PDIF controllers
- Support for ZTE AUD96P22 codecs
HD-audio:
- Support of new Realtek codecs (ALC215/ALC285/ALC289), more quirks
for HP and Dell machines
- A few more fixes for i915 component binding"
* tag 'sound-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (418 commits)
ALSA: hda - Fix unbalance of i915 module refcount
ASoC: Intel: Skylake: Remove driver debugfs exit
ASoC: Intel: Skylake: explicitly add the headers sst-dsp.h
ALSA: hda/realtek - Remove GPIO_MASK
ALSA: hda/realtek - Fix typo of pincfg for Dell quirk
ALSA: pcm: add a documentation for tracepoints
ALSA: atmel: ac97c: fix error return code in atmel_ac97c_probe()
ALSA: x86: fix error return code in hdmi_lpe_audio_probe()
ASoC: Intel: Skylake: Add support to read firmware registers
ASoC: Intel: Skylake: Add sram address to sst_addr structure
ASoC: Intel: Skylake: Debugfs facility to dump module config
ASoC: Intel: Skylake: Add debugfs support
ASoC: fix semicolon.cocci warnings
ASoC: rt5645: Add quirk override by module option
ASoC: rsnd: make arrays path and cmd_case static const
ASoC: audio-graph-card: add widgets and routing for external amplifier support
ASoC: audio-graph-card: update bindings for amplifier support
ASoC: rt5665: calibration should be done before jack detection
ASoC: rsnd: constify dev_pm_ops structures.
ASoC: nau8825: change crosstalk-bypass property to bool type
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound into dt/property-move
OF graph changes for ALSA conflict with the move of graph functions into
property.c.
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With the introduction of struct pci_host_bridge.(*map_irq) function pointer
add another direct usage of of_irq_parse_and_map_pci().
Update the function comment to reflect this behaviour.
Signed-off-by: Matthew Minter <matt@masarand.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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