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| author | Paul Durrant <Paul.Durrant@citrix.com> | 2016-05-18 15:55:42 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-20 17:41:18 -0400 |
| commit | c0fcded2e6879d817cec822b8513a2f6b6e4dfe9 (patch) | |
| tree | c7e993fac1aeaeac1b1f0f55f7ed88d2d4fdf667 /drivers | |
| parent | e6790fd861100a01838077b9b59bc339a80ee462 (diff) | |
| download | linux-c0fcded2e6879d817cec822b8513a2f6b6e4dfe9.tar.bz2 | |
xen-netback: only deinitialized hash if it was initialized
A domain with a frontend that does not implement a control ring has been
seen to cause a crash during domain save. This was apparently because
the call to xenvif_deinit_hash() in xenvif_disconnect_ctrl() is made
regardless of whether a control ring was connected, and hence
xenvif_hash_init() was called.
This patch brings the call to xenvif_deinit_hash() in
xenvif_disconnect_ctrl() inside the if clause that checks whether the
control ring event channel was connected. This is sufficient to ensure
it is only called if xenvif_init_hash() was called previously.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reported-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/xen-netback/interface.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index 1c7f49b5acc1..83deeebfc2d1 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -780,9 +780,8 @@ void xenvif_disconnect_ctrl(struct xenvif *vif) vif->ctrl_task = NULL; } - xenvif_deinit_hash(vif); - if (vif->ctrl_irq) { + xenvif_deinit_hash(vif); unbind_from_irqhandler(vif->ctrl_irq, vif); vif->ctrl_irq = 0; } |