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
..
partitions	partitions: aix.c: off by one bug	2014-08-05 13:13:24 -06:00
bio-integrity.c	bio-integrity: add "bip_max_vcnt" into struct bio_integrity_payload	2014-07-01 10:36:47 -06:00
bio.c	block: use kmalloc alignment for bio slab	2014-08-01 12:30:34 -04:00
blk-cgroup.c	Merge branch 'for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-08-04 10:11:28 -07:00
blk-cgroup.h	Revert "block: add __init to blkcg_policy_register"	2014-06-22 16:34:11 -06:00
blk-core.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00
blk-exec.c	block: blk-exec.c: Cleaning up local variable address returnd	2014-06-08 19:51:31 -06:00
blk-flush.c	block: remove elv_abort_queue and blk_abort_flushes	2014-06-11 15:31:21 -06:00
blk-integrity.c	bio-integrity: Convert to bvec_iter	2013-11-23 22:33:50 -08:00
blk-ioc.c	block: Substitute rcu_access_pointer() for rcu_dereference_raw()	2014-02-18 12:21:26 -08:00
blk-iopoll.c	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
blk-lib.c	block/blk-lib.c: make __blkdev_issue_zeroout static	2014-05-26 17:39:09 -06:00
blk-map.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
blk-merge.c	block: add support for limiting gaps in SG lists	2014-06-24 16:22:24 -06:00
blk-mq-cpu.c	blk-mq: add file comments and update copyright notices	2014-05-28 10:15:41 -06:00
blk-mq-cpumap.c	blk-mq: add file comments and update copyright notices	2014-05-28 10:15:41 -06:00
blk-mq-sysfs.c	blk-mq: blk_mq_unregister_hctx() can be static	2014-05-30 10:31:13 -06:00
blk-mq-tag.c	blk-mq: bitmap tag: fix races in bt_get() function	2014-06-17 22:13:08 -07:00
blk-mq-tag.h	blk-mq: bitmap tag: fix races on shared ::wake_index fields	2014-06-17 22:12:35 -07:00
blk-mq.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00
blk-mq.h	blk-mq: decouble blk-mq freezing from generic bypassing	2014-07-01 10:31:13 -06:00
blk-settings.c	block: ensure that bio_add_page() always accepts a page for an empty bio	2014-06-10 12:53:56 -06:00
blk-softirq.c	block: fix regression with block enabled tagging	2014-04-09 21:54:06 -06:00
blk-sysfs.c	block, blk-mq: draining can't be skipped even if bypass_depth was non-zero	2014-07-01 10:29:17 -06:00
blk-tag.c	block: don't assume last put of shared tags is for the host	2014-07-08 12:25:28 +02:00
blk-throttle.c	cgroup: remove sane_behavior support on non-default hierarchies	2014-07-09 10:08:08 -04:00
blk-timeout.c	block: ensure that the timer is always added	2014-05-30 15:41:39 -06:00
blk.h	block: remove elv_abort_queue and blk_abort_flushes	2014-06-11 15:31:21 -06:00
bounce.c	mm: convert some level-less printks to pr_*	2014-06-06 16:08:18 -07:00
bsg-lib.c	bsg: Remove unused function bsg_goose_queue()	2012-12-06 14:33:02 +01:00
bsg.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00
cfq-iosched.c	Merge branch 'for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-06-09 15:03:33 -07:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	Merge branch 'for-3.17/core' of git://git.kernel.dk/linux-block	2014-08-14 09:07:02 -06:00
deadline-iosched.c	block: Stop abusing csd.list for fifo_time	2014-02-24 14:46:32 -08:00
elevator.c	Revert "block: add __init to elv_register"	2014-06-22 16:34:11 -06:00
genhd.c	block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)	2013-09-11 13:22:03 -06:00
ioctl.c	block: fix BLKSECTGET ioctl when max_sectors is greater than USHRT_MAX	2014-07-01 10:43:07 -06:00
ioprio.c	block: move ioprio.c from fs/ to block/	2014-05-19 11:02:18 -06:00
Kconfig	block: change config option name for cmdline partition parsing	2013-09-30 14:31:02 -07:00
Kconfig.iosched	blkcg: make CONFIG_BLK_CGROUP bool	2012-03-06 21:27:21 +01:00
Makefile	block: move mm/bounce.c to block/	2014-05-19 20:01:52 -06:00
noop-iosched.c	elevator: Fix a race in elevator switching	2013-07-03 13:25:24 +02:00
partition-generic.c	Revert "loop: cleanup partitions when detaching loop device"	2013-04-08 10:12:11 +02:00
scsi_ioctl.c	block,scsi: fixup blk_get_request dead queue scenarios	2014-08-28 10:03:46 -06:00