Ming Lei aa0818c6ee virtio_blk: fix race between start and stop queue ... When there isn't enough vring descriptor for adding to vq, blk-mq will be put as stopped state until some of pending descriptors are completed & freed. Unfortunately, the vq's interrupt may come just before blk-mq's BLK_MQ_S_STOPPED flag is set, so the blk-mq will still be kept as stopped even though lots of descriptors are completed and freed in the interrupt handler. The worst case is that all pending descriptors are freed in the interrupt handler, and the queue is kept as stopped forever. This patch fixes the problem by starting/stopping blk-mq with holding vq_lock. Cc: Jens Axboe <axboe@kernel.dk> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ming Lei <tom.leiming@gmail.com> Cc: stable@kernel.org Signed-off-by: Jens Axboe <axboe@fb.com> Conflicts: drivers/block/virtio_blk.c		2014-05-27 08:41:10 -06:00
..
aoe	mm: close PageTail race	2014-03-04 07:55:47 -08:00
drbd	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-04-12 14:49:50 -07:00
mtip32xx	Merge branch 'for-3.15/drivers' of git://git.kernel.dk/linux-block	2014-04-01 19:43:53 -07:00
paride	drivers/block/paride/pg.c: underflow bug in pg_write()	2014-01-21 20:16:56 -08:00
rsxx	block: Convert bio_for_each_segment() to bvec_iter	2013-11-23 22:33:49 -08:00
xen-blkback	xen-blkback: init persistent_purge_work work_struct	2014-02-11 20:34:03 -07:00
zram	zram: support REQ_DISCARD	2014-04-07 16:36:02 -07:00
amiflop.c	tree-wide: use reinit_completion instead of INIT_COMPLETION	2013-11-15 09:32:21 +09:00
ataflop.c	ataflop: fix sleep_on races	2014-03-13 14:56:38 -06:00
brd.c	block: Convert bio_for_each_segment() to bvec_iter	2013-11-23 22:33:49 -08:00
cciss_cmd.h
cciss_scsi.c	cciss: switch to ->show_info()	2013-04-09 14:13:19 -04:00
cciss_scsi.h
cciss.c	cciss: Fallback to MSI rather than to INTx if MSI-X failed	2014-03-13 14:56:39 -06:00
cciss.h
cpqarray.c	cpqarray: fix info leak in ida_locked_ioctl()	2013-09-24 17:00:26 -07:00
cpqarray.h
cryptoloop.c	move linux/loop.h to drivers/block	2013-06-29 12:46:45 +04:00
DAC960.c	DAC960: remove sleep_on usage	2014-03-13 14:56:38 -06:00
DAC960.h
floppy.c	floppy: don't write kernel-only members to FDRAWCMD ioctl output	2014-05-05 07:46:56 -07:00
hd.c
ida_cmd.h
ida_ioctl.h
Kconfig	zram: promote zram from staging	2014-01-30 16:56:55 -08:00
loop.c	drivers/block/loop.c: ratelimit error messages	2014-04-08 14:44:35 -06:00
loop.h	move linux/loop.h to drivers/block	2013-06-29 12:46:45 +04:00
Makefile	zram: promote zram from staging	2014-01-30 16:56:55 -08:00
mg_disk.c	mg_disk: Spelling s/finised/finished/	2014-01-21 20:34:58 -08:00
nbd.c	switch nbd to sockfd_lookup/sockfd_put	2014-04-01 23:19:10 -04:00
null_blk.c	null_blk: use blk_complete_request and blk_mq_complete_request	2014-02-10 09:27:31 -07:00
nvme-core.c	Merge git://git.infradead.org/users/willy/linux-nvme	2014-04-11 16:45:59 -07:00
nvme-scsi.c	NVMe: Retry failed commands with non-fatal errors	2014-04-10 17:11:59 -04:00
osdblk.c	block: replace strict_strtoul() with kstrtoul()	2013-09-11 15:56:56 -07:00
pktcdvd.c	pktcdvd: fix error return code	2014-01-03 10:05:34 +01:00
ps3disk.c	block: Kill bio_segments()/bi_vcnt usage	2013-11-23 22:33:51 -08:00
ps3vram.c	block: Convert bio_for_each_segment() to bvec_iter	2013-11-23 22:33:49 -08:00
rbd_types.h
rbd.c	rbd: prefix rbd writes with CEPH_OSD_OP_SETALLOCHINT osd op	2014-04-03 10:33:52 +08:00
skd_main.c	skd: Use pci_enable_msix_range() instead of pci_enable_msix()	2014-02-21 15:45:26 -08:00
skd_s1120.h	skd: fix formatting in skd_s1120.h	2013-11-08 09:10:30 -07:00
smart1,2.h
sunvdc.c
swim3.c	swim3: fix interruptible_sleep_on race	2014-03-13 14:56:38 -06:00
swim_asm.S
swim.c	drivers/block/swim.c: remove unnecessary platform_set_drvdata()	2013-09-11 15:56:59 -07:00
sx8.c	drivers/block/sx8.c: remove unnecessary pci_set_drvdata()	2014-01-21 20:16:56 -08:00
umem.c	block: Convert drivers to immutable biovecs	2013-11-23 22:33:51 -08:00
umem.h
virtio_blk.c	virtio_blk: fix race between start and stop queue	2014-05-27 08:41:10 -06:00
xen-blkfront.c	Merge branch 'stable/for-jens-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip into for-linus	2014-02-10 12:52:34 -07:00
xsysace.c	xilinx systemace: Fix sparse warnings	2013-07-10 07:47:12 +02:00
z2ram.c	block/z2ram: Remove duplicate external declarations	2013-11-26 11:09:10 +01:00