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path: root/drivers/xen/pvcalls-front.c
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Diffstat (limited to 'drivers/xen/pvcalls-front.c')
-rw-r--r--drivers/xen/pvcalls-front.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index 40caa92bff33..d1e1d8d2b9d5 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -1103,7 +1103,7 @@ static int pvcalls_front_remove(struct xenbus_device *dev)
kfree(map);
}
}
- if (bedata->ref >= 0)
+ if (bedata->ref != -1)
gnttab_end_foreign_access(bedata->ref, 0, 0);
kfree(bedata->ring.sring);
kfree(bedata);
@@ -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")) {