summaryrefslogtreecommitdiffstats
path: root/net
diff options
context:
space:
mode:
authorLi Dongyang <lidongyang@novell.com>2011-09-14 14:02:40 +0800
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-10-13 09:48:32 -0400
commit69ef68cef961a934c35308843a04b26d91cad4a8 (patch)
treebf7bebecdcd53aa75f80fb1e066f2293a2483916 /net
parented30bf317c5ceb25166cdbce3e0b35e33c82b509 (diff)
downloadblackbird-op-linux-69ef68cef961a934c35308843a04b26d91cad4a8.tar.gz
blackbird-op-linux-69ef68cef961a934c35308843a04b26d91cad4a8.zip
xen-blkfront: fix a deadlock while handling discard response
When we get -EOPNOTSUPP response for a discard request, we will clear the discard flag on the request queue so we won't attempt to send discard requests to backend again, and this should be protected under rq->queue_lock. However, when we setup the request queue, we pass blkif_io_lock to blk_init_queue so rq->queue_lock is blkif_io_lock indeed, and this lock is already taken when we are in blkif_interrpt, so remove the spin_lock/spin_unlock when we clear the discard flag or we will end up with deadlock here Signed-off-by: Li Dongyang <lidongyang@novell.com> [v1: Updated description a bit and removed comment from source] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud