diff options
| author | David Vrabel <david.vrabel@citrix.com> | 2014-02-04 22:53:56 +0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-02-07 22:35:20 +0400 |
| commit | 3661371701e714f0cea4120f6a365340858fb4e4 (patch) | |
| tree | 2deb8e53086519edbb39bc0525eaa286a83fbff1 /drivers/block | |
| parent | 80bfa2f6e2e81049fc6cd3bfaeedcb64db3a9ba6 (diff) | |
| download | linux-3661371701e714f0cea4120f6a365340858fb4e4.tar.xz | |
xen-blkfront: handle backend CLOSED without CLOSING
Backend drivers shouldn't transistion to CLOSED unless the frontend is
CLOSED. If a backend does transition to CLOSED too soon then the
frontend may not see the CLOSING state and will not properly shutdown.
So, treat an unexpected backend CLOSED state the same as CLOSING.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/xen-blkfront.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 7d09dfc9735c..76e5c0b265b1 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -1904,13 +1904,16 @@ static void blkback_changed(struct xenbus_device *dev, case XenbusStateReconfiguring: case XenbusStateReconfigured: case XenbusStateUnknown: - case XenbusStateClosed: break; case XenbusStateConnected: blkfront_connect(info); break; + case XenbusStateClosed: + if (dev->state == XenbusStateClosed) + break; + /* Missed the backend's Closing state -- fallthrough */ case XenbusStateClosing: blkfront_closing(info); break; |