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authorHelge Deller <deller@gmx.de>2019-09-05 16:44:17 +0200
committerHelge Deller <deller@gmx.de>2019-09-08 15:43:04 +0200
commit5fa1659105fac63e0f3c199b476025c2e04111ce (patch)
tree62ae6ea42480684c0668a42c5f6569138b22fb1e /ipc
parent1191cf4986b5e8008c615896e487dc35fe922acd (diff)
parisc: Disable HP HSC-PCI Cards to prevent kernel crash
The HP Dino PCI controller chip can be used in two variants: as on-board controller (e.g. in B160L), or on an Add-On card ("Card-Mode") to bridge PCI components to systems without a PCI bus, e.g. to a HSC/GSC bus. One such Add-On card is the HP HSC-PCI Card which has one or more DEC Tulip PCI NIC chips connected to the on-card Dino PCI controller. Dino in Card-Mode has a big disadvantage: All PCI memory accesses need to go through the DINO_MEM_DATA register, so Linux drivers will not be able to use the ioremap() function. Without ioremap() many drivers will not work, one example is the tulip driver which then simply crashes the kernel if it tries to access the ports on the HP HSC card. This patch disables the HP HSC card if it finds one, and as such fixes the kernel crash on a HP D350/2 machine. Signed-off-by: Helge Deller <deller@gmx.de> Noticed-by: Phil Scarr <phil.scarr@pm.me> Cc: stable@vger.kernel.org
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