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| author | Laszlo Ersek <lersek@redhat.com> | 2011-05-13 09:45:40 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2011-05-13 09:45:40 -0400 |
| commit | 496b318eb65558c1a3a4fe882cb9da6d1dc6493a (patch) | |
| tree | 090f1739245a42ef4c147d36e52c3aca557b4dcd /drivers/block | |
| parent | 5185432277ddf5bd91ad5af29cd1945f25ed10fc (diff) | |
| download | op-kernel-dev-496b318eb65558c1a3a4fe882cb9da6d1dc6493a.zip op-kernel-dev-496b318eb65558c1a3a4fe882cb9da6d1dc6493a.tar.gz | |
xen/blkback: fix xenbus_transaction_start() hang caused by double xenbus_transaction_end()
vbd_resize() up_read()'s xs_state.suspend_mutex twice in a row via double
xenbus_transaction_end() calls. The next down_read() in
xenbus_transaction_start() (at eg. the next resize attempt) hangs.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=618317
Acked-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/xen-blkback/blkback.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c index 9dee545..dba55e3 100644 --- a/drivers/block/xen-blkback/blkback.c +++ b/drivers/block/xen-blkback/blkback.c @@ -226,6 +226,7 @@ again: goto again; if (err) pr_warn(DRV_PFX "Error ending transaction"); + return; abort: xenbus_transaction_end(xbt, 1); } |
