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0c29e93eae
linux/drivers/block
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Ming Lei 0c29e93eae 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>
Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-16 09:40:31 -06:00
..
aoe mm: close PageTail race 2014-03-04 07:55:47 -08:00
drbd drbd: use list_first_entry_or_null in first_peer_device/first_connection 2014-04-30 13:46:56 -06:00
mtip32xx mtip32xx: stop block hardware queues before quiescing IO 2014-05-14 08:22:56 -06:00
paride block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
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 block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
ataflop.c block: remove struct request buffer member 2014-04-15 14:03:02 -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: Use pci_enable_msix_exact() instead of pci_enable_msix() 2014-04-21 19:02:08 -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 block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
hd.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
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 block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
nbd.c switch nbd to sockfd_lookup/sockfd_put 2014-04-01 23:19:10 -04:00
null_blk.c block: null_blk: fix use after free 2014-05-01 09:17:41 -06:00
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: get rid of RBD_MAX_SEG_NAME_LEN 2012-12-17 08:37:29 -06:00
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_exact() instead of pci_enable_msix_range() 2014-04-21 19:02:05 -06:00
skd_s1120.h skd: fix formatting in skd_s1120.h 2013-11-08 09:10:30 -07:00
smart1,2.h
sunvdc.c sunvdc: Fix off-by-one in generic_request(). 2013-02-14 11:49:01 -08:00
swim3.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
swim_asm.S
swim.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
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 2014-05-16 09:40:31 -06:00
xen-blkfront.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
xsysace.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00
z2ram.c block: remove struct request buffer member 2014-04-15 14:03:02 -06:00