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authorLinus Torvalds <torvalds@linux-foundation.org>2020-11-27 14:38:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-11-27 14:38:02 -0800
commit79c0c1f0389db60f3c83ec91585a39d16e036f21 (patch)
treedf42548723f997dace9589468ca118ddb48dd8f9 /drivers/s390
parent80e1e1761d1a9eefda4d1545f8b6c0a2e46d4e3f (diff)
parentd0742c49cab58ee6e2de40f1958b736aedf779b6 (diff)
Merge tag 'net-5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski: "Networking fixes for 5.10-rc6, including fixes from the WiFi driver, and CAN subtrees. Current release - regressions: - gro_cells: reduce number of synchronize_net() calls - ch_ktls: release a lock before jumping to an error path Current release - always broken: - tcp: Allow full IP tos/IPv6 tclass to be reflected in L3 header Previous release - regressions: - net/tls: fix missing received data after fast remote close - vsock/virtio: discard packets only when socket is really closed - sock: set sk_err to ee_errno on dequeue from errq - cxgb4: fix the panic caused by non smac rewrite Previous release - always broken: - tcp: fix corner cases around setting ECN with BPF selection of congestion control - tcp: fix race condition when creating child sockets from syncookies on loopback interface - usbnet: ipheth: fix connectivity with iOS 14 - tun: honor IOCB_NOWAIT flag - net/packet: fix packet receive on L3 devices without visible hard header - devlink: Make sure devlink instance and port are in same net namespace - net: openvswitch: fix TTL decrement action netlink message format - bonding: wait for sysfs kobject destruction before freeing struct slave - net: stmmac: fix upstream patch applied to the wrong context - bnxt_en: fix return value and unwind in probe error paths Misc: - devlink: add extra layer of categorization to the reload stats uAPI before it's released" * tag 'net-5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits) sock: set sk_err to ee_errno on dequeue from errq mptcp: fix NULL ptr dereference on bad MPJ net: openvswitch: fix TTL decrement action netlink message format can: af_can: can_rx_unregister(): remove WARN() statement from list operation sanity check can: m_can: m_can_dev_setup(): add support for bosch mcan version 3.3.0 can: m_can: fix nominal bitiming tseg2 min for version >= 3.1 can: m_can: m_can_open(): remove IRQF_TRIGGER_FALLING from request_threaded_irq()'s flags can: mcp251xfd: mcp251xfd_probe(): bail out if no IRQ was given can: gs_usb: fix endianess problem with candleLight firmware ch_ktls: lock is not freed net/tls: Protect from calling tls_dev_del for TLS RX twice devlink: Make sure devlink instance and port are in same net namespace devlink: Hold rtnl lock while reading netdev attributes ptp: clockmatrix: bug fix for idtcm_strverscmp enetc: Let the hardware auto-advance the taprio base-time of 0 gro_cells: reduce number of synchronize_net() calls net: stmmac: fix incorrect merge of patch upstream ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init Documentation: netdev-FAQ: suggest how to post co-dependent series ibmvnic: enhance resetting status check during module exit ...
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/net/qeth_core.h9
-rw-r--r--drivers/s390/net/qeth_core_main.c82
-rw-r--r--drivers/s390/net/qeth_l2_main.c18
3 files changed, 62 insertions, 47 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h
index f73b4756ed5e..b235393e091c 100644
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -417,10 +417,13 @@ enum qeth_qdio_out_buffer_state {
QETH_QDIO_BUF_EMPTY,
/* Filled by driver; owned by hardware in order to be sent. */
QETH_QDIO_BUF_PRIMED,
- /* Identified to be pending in TPQ. */
+ /* Discovered by the TX completion code: */
QETH_QDIO_BUF_PENDING,
- /* Found in completion queue. */
- QETH_QDIO_BUF_IN_CQ,
+ /* Finished by the TX completion code: */
+ QETH_QDIO_BUF_NEED_QAOB,
+ /* Received QAOB notification on CQ: */
+ QETH_QDIO_BUF_QAOB_OK,
+ QETH_QDIO_BUF_QAOB_ERROR,
/* Handled via transfer pending / completion queue. */
QETH_QDIO_BUF_HANDLED_DELAYED,
};
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 93c9b30ab17a..e27319de7b00 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -33,6 +33,7 @@
#include <net/iucv/af_iucv.h>
#include <net/dsfield.h>
+#include <net/sock.h>
#include <asm/ebcdic.h>
#include <asm/chpid.h>
@@ -499,17 +500,12 @@ static void qeth_cleanup_handled_pending(struct qeth_qdio_out_q *q, int bidx,
}
}
- if (forced_cleanup && (atomic_read(&(q->bufs[bidx]->state)) ==
- QETH_QDIO_BUF_HANDLED_DELAYED)) {
- /* for recovery situations */
- qeth_init_qdio_out_buf(q, bidx);
- QETH_CARD_TEXT(q->card, 2, "clprecov");
- }
}
static void qeth_qdio_handle_aob(struct qeth_card *card,
unsigned long phys_aob_addr)
{
+ enum qeth_qdio_out_buffer_state new_state = QETH_QDIO_BUF_QAOB_OK;
struct qaob *aob;
struct qeth_qdio_out_buffer *buffer;
enum iucv_tx_notify notification;
@@ -521,22 +517,6 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
buffer = (struct qeth_qdio_out_buffer *) aob->user1;
QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
- if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
- QETH_QDIO_BUF_IN_CQ) == QETH_QDIO_BUF_PRIMED) {
- notification = TX_NOTIFY_OK;
- } else {
- WARN_ON_ONCE(atomic_read(&buffer->state) !=
- QETH_QDIO_BUF_PENDING);
- atomic_set(&buffer->state, QETH_QDIO_BUF_IN_CQ);
- notification = TX_NOTIFY_DELAYED_OK;
- }
-
- if (aob->aorc != 0) {
- QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
- notification = qeth_compute_cq_notification(aob->aorc, 1);
- }
- qeth_notify_skbs(buffer->q, buffer, notification);
-
/* Free dangling allocations. The attached skbs are handled by
* qeth_cleanup_handled_pending().
*/
@@ -548,7 +528,33 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
if (data && buffer->is_header[i])
kmem_cache_free(qeth_core_header_cache, data);
}
- atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
+
+ if (aob->aorc) {
+ QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
+ new_state = QETH_QDIO_BUF_QAOB_ERROR;
+ }
+
+ switch (atomic_xchg(&buffer->state, new_state)) {
+ case QETH_QDIO_BUF_PRIMED:
+ /* Faster than TX completion code. */
+ notification = qeth_compute_cq_notification(aob->aorc, 0);
+ qeth_notify_skbs(buffer->q, buffer, notification);
+ atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
+ break;
+ case QETH_QDIO_BUF_PENDING:
+ /* TX completion code is active and will handle the async
+ * completion for us.
+ */
+ break;
+ case QETH_QDIO_BUF_NEED_QAOB:
+ /* TX completion code is already finished. */
+ notification = qeth_compute_cq_notification(aob->aorc, 1);
+ qeth_notify_skbs(buffer->q, buffer, notification);
+ atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ }
qdio_release_aob(aob);
}
@@ -1405,7 +1411,7 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *q,
skb_queue_walk(&buf->skb_list, skb) {
QETH_CARD_TEXT_(q->card, 5, "skbn%d", notification);
QETH_CARD_TEXT_(q->card, 5, "%lx", (long) skb);
- if (skb->protocol == htons(ETH_P_AF_IUCV) && skb->sk)
+ if (skb->sk && skb->sk->sk_family == PF_IUCV)
iucv_sk(skb->sk)->sk_txnotify(skb, notification);
}
}
@@ -1416,9 +1422,6 @@ static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
struct qeth_qdio_out_q *queue = buf->q;
struct sk_buff *skb;
- /* release may never happen from within CQ tasklet scope */
- WARN_ON_ONCE(atomic_read(&buf->state) == QETH_QDIO_BUF_IN_CQ);
-
if (atomic_read(&buf->state) == QETH_QDIO_BUF_PENDING)
qeth_notify_skbs(queue, buf, TX_NOTIFY_GENERALERROR);
@@ -5869,9 +5872,32 @@ static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
QETH_QDIO_BUF_PENDING) ==
- QETH_QDIO_BUF_PRIMED)
+ QETH_QDIO_BUF_PRIMED) {
qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
+ /* Handle race with qeth_qdio_handle_aob(): */
+ switch (atomic_xchg(&buffer->state,
+ QETH_QDIO_BUF_NEED_QAOB)) {
+ case QETH_QDIO_BUF_PENDING:
+ /* No concurrent QAOB notification. */
+ break;
+ case QETH_QDIO_BUF_QAOB_OK:
+ qeth_notify_skbs(queue, buffer,
+ TX_NOTIFY_DELAYED_OK);
+ atomic_set(&buffer->state,
+ QETH_QDIO_BUF_HANDLED_DELAYED);
+ break;
+ case QETH_QDIO_BUF_QAOB_ERROR:
+ qeth_notify_skbs(queue, buffer,
+ TX_NOTIFY_DELAYED_GENERALERROR);
+ atomic_set(&buffer->state,
+ QETH_QDIO_BUF_HANDLED_DELAYED);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ }
+ }
+
QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
/* prepare the queue slot for re-use: */
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 28f6dda95736..79939ba5d523 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -985,32 +985,19 @@ static void qeth_l2_setup_bridgeport_attrs(struct qeth_card *card)
* change notification' and thus can support the learning_sync bridgeport
* attribute
* @card: qeth_card structure pointer
- *
- * This is a destructive test and must be called before dev2br or
- * bridgeport address notification is enabled!
*/
static void qeth_l2_detect_dev2br_support(struct qeth_card *card)
{
struct qeth_priv *priv = netdev_priv(card->dev);
bool dev2br_supported;
- int rc;
QETH_CARD_TEXT(card, 2, "d2brsup");
if (!IS_IQD(card))
return;
/* dev2br requires valid cssid,iid,chid */
- if (!card->info.ids_valid) {
- dev2br_supported = false;
- } else if (css_general_characteristics.enarf) {
- dev2br_supported = true;
- } else {
- /* Old machines don't have the feature bit:
- * Probe by testing whether a disable succeeds
- */
- rc = qeth_l2_pnso(card, PNSO_OC_NET_ADDR_INFO, 0, NULL, NULL);
- dev2br_supported = !rc;
- }
+ dev2br_supported = card->info.ids_valid &&
+ css_general_characteristics.enarf;
QETH_CARD_TEXT_(card, 2, "D2Bsup%02x", dev2br_supported);
if (dev2br_supported)
@@ -2233,7 +2220,6 @@ static int qeth_l2_set_online(struct qeth_card *card, bool carrier_ok)
struct net_device *dev = card->dev;
int rc = 0;
- /* query before bridgeport_notification may be enabled */
qeth_l2_detect_dev2br_support(card);
mutex_lock(&card->sbp_lock);