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xen/pvcalls-back: test for errors when calling backend_connect()

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commit c8d70a29d6bbc956013f3401f92a4431a9385a3c upstream.

backend_connect() can fail, so switch the device to connected only if
no error occurred.

Fixes: 0a9c75c2c7 ("xen/pvcalls: xenbus state handling")
Cc: stable@vger.kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20200511074231.19794-1-jgross@suse.com
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Juergen Gross 2020-05-11 09:42:31 +02:00 committed by Greg Kroah-Hartman
parent 29ed45653b
commit 85831981aa
1 changed files with 2 additions and 1 deletions
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3
drivers/xen/pvcalls-back.c
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@ -1087,7 +1087,8 @@ static void set_backend_state(struct xenbus_device *dev,
case XenbusStateInitialised:
switch (state) {
case XenbusStateConnected:
backend_connect(dev);
if (backend_connect(dev))
return;
xenbus_switch_state(dev, XenbusStateConnected);
break;
case XenbusStateClosing: