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

backend_connect() can fail, so switch the device to connected only if no error occurred. Fixes: 0a9c75c ("xen/pvcalls: xenbus state handling") Cc: [email protected] Signed-off-by: Juergen Gross <[email protected]> Link: https://lore.kernel.org/r/[email protected] Reviewed-by: Stefano Stabellini <[email protected]> Signed-off-by: Boris Ostrovsky <[email protected]>
zandrey · May 21, 2020 · c8d70a2 · c8d70a2
1 parent b9bbe6e
commit c8d70a2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
@@ -1088,7 +1088,8 @@ 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: