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| author |   David Vrabel <david.vrabel@citrix.com> | 2012-10-18 11:03:37 +0100 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-10-30 09:28:17 -0400 |
| commit | 01bc825f6311ba2878ae353418eee575d3051594 (patch) | |
| tree | 2c060623dcaccc6a3b7f86408470abd375b8248a /drivers/video/xen-fbfront.c | |
| parent | xen/gntdev: don't leak memory from IOCTL_GNTDEV_MAP_GRANT_REF (diff) | |
| download | linux-dev-01bc825f6311ba2878ae353418eee575d3051594.tar.xz linux-dev-01bc825f6311ba2878ae353418eee575d3051594.zip | |
xen-fbfront: 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.
Acked-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/video/xen-fbfront.c')
| -rw-r--r-- | drivers/video/xen-fbfront.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/video/xen-fbfront.c b/drivers/video/xen-fbfront.c index b7f5173ff9e9..917bb5681684 100644 --- a/drivers/video/xen-fbfront.c +++ b/drivers/video/xen-fbfront.c @@ -641,7 +641,6 @@ static void xenfb_backend_changed(struct xenbus_device *dev, case XenbusStateReconfiguring: case XenbusStateReconfigured: case XenbusStateUnknown: - case XenbusStateClosed: break; case XenbusStateInitWait: @@ -670,6 +669,10 @@ InitWait: info->feature_resize = val; break; + case XenbusStateClosed: + if (dev->state == XenbusStateClosed) + break; + /* Missed the backend's CLOSING state -- fallthrough */ case XenbusStateClosing: xenbus_frontend_closed(dev); break; |