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authorJens Axboe <axboe@suse.de>2006-05-11 08:20:16 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-11 12:38:59 -0700
commitdac07ec121de66b6be988b14ae2cd9ce45357b21 (patch)
tree95359f17d0857fd52f399cef072097523227d032 /drivers/scsi/lpfc/lpfc_mbox.c
parentf358166a9405e4f1d8e50d8f415c26d95505b6de (diff)
[BLOCK] limit request_fn recursion
Don't recurse back into the driver even if the unplug threshold is met, when the driver asks for a requeue. This is both silly from a logical point of view (requeues typically happen due to driver/hardware shortage), and also dangerous since we could hit an endless request_fn -> requeue -> unplug -> request_fn loop and crash on stack overrun. Also limit blk_run_queue() to one level of recursion, similar to how blk_start_queue() works. This patch fixed a real problem with SLES10 and lpfc, and it could hit any SCSI lld that returns non-zero from it's ->queuecommand() handler. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_mbox.c')
0 files changed, 0 insertions, 0 deletions