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Commit 8c71fa88 authored by Dan Carpenter's avatar Dan Carpenter Committed by Boris Ostrovsky
Browse files

xen/pvcalls: check for xenbus_read() errors 



Smatch complains that "len" is uninitialized if xenbus_read() fails so
let's add some error handling.

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: default avatarJuergen Gross <jgross@suse.com>
Reviewed-by: default avatarStefano Stabellini <sstabellini@kernel.org>
Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent 646d944c

drivers/xen/pvcalls-front.c

+2 −0
Original line number Diff line number Diff line
@@ -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")) {