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Michael S. Tsirkin 4678d6f970 virtio_blk: fix config handler race 
Fix a theoretical race related to config work
handler: a config interrupt might happen
after we flush config work but before we
reset the device. It will then cause the
config work to run during or after reset.

Two problems with this:
- if this runs after device is gone we will get use after free
- access of config while reset is in progress is racy
(as layout is changing).

As a solution
1. flush after reset when we know there will be no more interrupts
2. add a flag to disable config access before reset

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 		2012-01-12 15:44:44 +10:30
..
aoe switch device_get_devnode() and ->devnode() to umode_t * 2012-01-03 22:54:55 -05:00
drbd Merge branch 'for-3.2/core' of git://git.kernel.dk/linux-block 2011-11-04 17:06:58 -07:00
paride paride: fix potential information leak in pg_read() 2011-11-16 09:21:50 +01:00
xen-blkback Merge branch 'stable/for-linus-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2012-01-10 10:09:59 -08:00
DAC960.c block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe drivers 2011-04-21 21:33:05 +02:00
DAC960.h Fix DAC960 driver on machines which don't support 64-bit DMA 2007-09-11 17:21:19 -07:00
Kconfig Merge branch 'stable/for-jens' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-linus 2011-08-09 20:43:26 +02:00
Makefile xen/blkback: Move it from drivers/xen to drivers/block 2011-04-18 14:30:26 -04:00
amiflop.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
ataflop.c block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe drivers 2011-04-21 21:33:05 +02:00
brd.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
cciss.c cciss: fix flush cache transfer length 2011-11-28 20:12:05 +01:00
cciss.h cciss: Adds simple mode functionality 2011-08-08 11:40:15 +02:00
cciss_cmd.h cciss: use new doorbell-bit-5 reset method 2011-05-06 08:23:55 -06:00
cciss_scsi.c cciss: auto engage SCSI mid layer at driver load time 2011-11-16 09:21:49 +01:00
cciss_scsi.h cciss: add cciss_tape_cmds module paramter 2011-05-06 08:23:59 -06:00
cpqarray.c drivers/block/cpqarray.c: use pci_dev->revision 2011-09-21 10:02:13 +02:00
cpqarray.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cryptoloop.c drivers: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:32 -04:00
floppy.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
hd.c i8253: Create linux/i8253.h and use it in all 8253 related files 2011-06-09 15:01:37 +02:00
ida_cmd.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ida_ioctl.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
loop.c fs: move code out of buffer.c 2012-01-03 22:54:07 -05:00
mg_disk.c block: switch s390 tape_block and mg_disk to elevator_change() 2010-08-23 14:02:44 +02:00
nbd.c nbd-replace-some-printk-with-dev_warn-and-dev_info-checkpatch-fixes 2011-08-19 14:48:28 +02:00
osdblk.c block: remove spurious uses of REQ_HARDBARRIER 2010-09-10 12:35:36 +02:00
pktcdvd.c switch device_get_devnode() and ->devnode() to umode_t * 2012-01-03 22:54:55 -05:00
ps3disk.c block: Fix files that are modules and hence need module.h 2011-10-31 19:31:13 -04:00
ps3vram.c Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
rbd.c rbd: remove buggy rollback functionality 2011-12-07 10:46:19 -08:00
rbd_types.h rbd: introduce rados block device (rbd), based on libceph 2010-10-20 15:38:13 -07:00
smart1,2.h fix typos 'comamnd' -> 'command' in comments 2011-02-02 11:31:21 +01:00
sunvdc.c block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
swim.c m68k/mac: cleanup forward declarations 2011-12-10 19:52:46 +01:00
swim3.c block/swim3: Locking fixes 2011-12-12 12:42:12 +01:00
swim_asm.S m68k: mac - Add SWIM floppy support 2009-03-26 21:15:27 +01:00
sx8.c block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
ub.c block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe drivers 2011-04-21 21:33:05 +02:00
umem.c block: remove support for bio remapping from ->make_request 2011-09-12 12:12:01 +02:00
umem.h drivers/block/umem: trim trailing whitespace 2007-10-10 09:25:59 +02:00
viodasd.c Fix common misspellings 2011-03-31 11:26:23 -03:00
virtio_blk.c virtio_blk: fix config handler race 2012-01-12 15:44:44 +10:30
xd.c block: autoconvert trivial BKL users to private mutex 2010-10-05 15:01:10 +02:00
xd.h [PATCH] switch xd 2008-10-21 07:48:11 -04:00
xen-blkfront.c Xen: consolidate and simplify struct xenbus_driver instantiation 2012-01-04 17:01:17 -05:00
xsysace.c block: xsysace: Don't use NO_IRQ 2012-01-05 08:34:29 +01:00
z2ram.c drivers/block/z2ram.c: correct printing of sector_t 2010-10-28 06:15:26 -06:00