user/sven/linux.git/drivers/infiniband, branch v3.2.44

IPoIB: Fix send lockup due to missed TX completion

2013-04-10T02:20:02Z

commit 1ee9e2aa7b31427303466776f455d43e5e3c9275 upstream. Commit f0dc117abdfa ("IPoIB: Fix TX queue lockup with mixed UD/CM traffic") attempts to solve an issue where unprocessed UD send completions can deadlock the netdev. The patch doesn't fully resolve the issue because if more than half the tx_outstanding's were UD and all of the destinations are RC reachable, arming the CQ doesn't solve the issue. This patch uses the IB_CQ_REPORT_MISSED_EVENTS on the ib_req_notify_cq(). If the rc is above 0, the UD send cq completion callback is called directly to re-arm the send completion timer. This issue is seen in very large parallel filesystem deployments and the patch has been shown to correct the issue. Reviewed-by: Dean Luick Signed-off-by: Mike Marciniszyn Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

RDMA/nes: Fix for terminate timer crash

2013-01-16T01:13:28Z

commit 7bfcfa51c35cdd2d37e0d70fc11790642dd11fb3 upstream. The terminate timer needs to be initialized just once. Signed-off-by: Tatyana Nikolova Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

RDMA/nes: Fix for crash when registering zero length MR for CQ

2013-01-16T01:13:28Z

commit 7d9c199a55200c9b9fcad08e150470d02fb385be upstream. Signed-off-by: Tatyana Nikolova Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

IB/srp: Avoid having aborted requests hang

2012-10-17T02:49:19Z

commit d8536670916a685df116b5c2cb256573fd25e4e3 upstream. We need to call scsi_done() for commands after we abort them. Signed-off-by: Bart Van Assche Acked-by: David Dillow Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

IB/srp: Fix use-after-free in srp_reset_req()

2012-10-17T02:49:18Z

commit 9b796d06d5d1b1e85ae2316a283ea11dd739ef96 upstream. srp_free_req() uses the scsi_cmnd structure contents to unmap buffers, so we must invoke srp_free_req() before we release ownership of that structure. Signed-off-by: Bart Van Assche Acked-by: David Dillow Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

IPoIB: Fix use-after-free of multicast object

2012-10-17T02:49:17Z

commit bea1e22df494a729978e7f2c54f7bda328f74bc3 upstream. Fix a crash in ipoib_mcast_join_task(). (with help from Or Gerlitz) Commit c8c2afe360b7 ("IPoIB: Use rtnl lock/unlock when changing device flags") added a call to rtnl_lock() in ipoib_mcast_join_task(), which is run from the ipoib_workqueue, and hence the workqueue can't be flushed from the context of ipoib_stop(). In the current code, ipoib_stop() (which doesn't flush the workqueue) calls ipoib_mcast_dev_flush(), which goes and deletes all the multicast entries. This takes place without any synchronization with a possible running instance of ipoib_mcast_join_task() for the same ipoib device, leading to a crash due to NULL pointer dereference. Fix this by making sure that the workqueue is flushed before ipoib_mcast_dev_flush() is called. To make that possible, we move the RTNL-lock wrapped code to ipoib_mcast_join_finish(). Signed-off-by: Patrick McHardy Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

IB/srp: Fix a race condition

2012-09-12T02:37:04Z

commit 220329916c72ee3d54ae7262b215a050f04a18fc upstream. Avoid a crash caused by the scmnd->scsi_done(scmnd) call in srp_process_rsp() being invoked with scsi_done == NULL. This can happen if a reply is received during or after a command abort. Reported-by: Joseph Glanville Reference: http://marc.info/?l=linux-rdma&m=134314367801595 Acked-by: David Dillow Signed-off-by: Bart Van Assche Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

RDMA/cxgb4: Drop peer_abort when no endpoint found

2012-05-30T23:43:27Z

commit 14b9222808bb8bfefc71f72bc0dbdcf3b2f0140f upstream. Log a warning and drop the abort message. Otherwise we will do a bogus wake_up() and crash. Signed-off-by: Steve Wise Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

RDMA/cxgb4: Always wake up waiters in c4iw_peer_abort_intr()

2012-05-30T23:43:27Z

commit 0f1dcfae6bc5563424346ad3a03282b8235a4c33 upstream. This fixes a race where an ingress abort fails to wake up the thread blocked in rdma_init() causing the app to hang. Signed-off-by: Steve Wise Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings

IB/core: Fix mismatch between locked and pinned pages

2012-05-30T23:43:25Z

commit c4870eb874ac16dccef40e1bc7a002c7e9156adc upstream. Commit bc3e53f682d9 ("mm: distinguish between mlocked and pinned pages") introduced a separate counter for pinned pages and used it in the IB stack. However, in ib_umem_get() the pinned counter is incremented, but ib_umem_release() wrongly decrements the locked counter. Fix this. Signed-off-by: Yishai Hadas Reviewed-by: Christoph Lameter Signed-off-by: Roland Dreier Signed-off-by: Ben Hutchings