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-rw-r--r--drivers/xen/pvcalls-front.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 40caa92bff33..afa3f1b5d807 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -1128,6 +1128,8 @@ static int pvcalls_front_probe(struct xenbus_device *dev,
}
versions = xenbus_read(XBT_NIL, dev->otherend, "versions", &len);
+ if (IS_ERR(versions))
+ return PTR_ERR(versions);
if (!len)
return -EINVAL;
if (strcmp(versions, "1")) {

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