From 31d47266c6e599d76e84c9809f9ea2735d9cda5b Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Thu, 13 Apr 2017 10:57:56 -0700 Subject: [PATCH] xen/9pfs: initialize len to 0 to detect xenbus_read errors In order to use "len" to check for xenbus_read errors properly, we need to initialize len to 0 before passing it to xenbus_read. CC: dan.carpenter@oracle.com CC: jgross@suse.com CC: boris.ostrovsky@oracle.com CC: Eric Van Hensbergen CC: Ron Minnich CC: Latchesar Ionkov CC: v9fs-developer@lists.sourceforge.net Signed-off-by: Stefano Stabellini Reviewed-by: Juergen Gross Signed-off-by: Juergen Gross --- net/9p/trans_xen.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 47864245c0d4..71e85643b3f9 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -386,7 +386,7 @@ static int xen_9pfs_front_probe(struct xenbus_device *dev, struct xenbus_transaction xbt; struct xen_9pfs_front_priv *priv = NULL; char *versions; - unsigned int max_rings, max_ring_order, len; + unsigned int max_rings, max_ring_order, len = 0; versions = xenbus_read(XBT_NIL, dev->otherend, "versions", &len); if (!len) -- 2.30.2