leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
c1207c049b
linux/drivers/scsi/device_handler
History
Joe Lawrence a492f07545 block,scsi: fixup blk_get_request dead queue scenarios 
The blk_get_request function may fail in low-memory conditions or during
device removal (even if __GFP_WAIT is set). To distinguish between these
errors, modify the blk_get_request call stack to return the appropriate
ERR_PTR. Verify that all callers check the return status and consider
IS_ERR instead of a simple NULL pointer check.

For consistency, make a similar change to the blk_mq_alloc_request leg
of blk_get_request.  It may fail if the queue is dead, or the caller was
unwilling to wait.

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Jiri Kosina <jkosina@suse.cz> [for pktdvd]
Acked-by: Boaz Harrosh <bharrosh@panasas.com> [for osd]
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-08-28 10:03:46 -06:00
..
Kconfig drivers/scsi/device_handler: remove depends on CONFIG_EXPERIMENTAL 2013-01-21 14:52:45 -08:00
Makefile
scsi_dh_alua.c block,scsi: fixup blk_get_request dead queue scenarios 2014-08-28 10:03:46 -06:00
scsi_dh_emc.c block,scsi: fixup blk_get_request dead queue scenarios 2014-08-28 10:03:46 -06:00
scsi_dh_hp_sw.c block,scsi: fixup blk_get_request dead queue scenarios 2014-08-28 10:03:46 -06:00
scsi_dh_rdac.c block,scsi: fixup blk_get_request dead queue scenarios 2014-08-28 10:03:46 -06:00
scsi_dh.c