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xen/9pfs: initialize len to 0 to detect xenbus_read errors

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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: [email protected]
CC: [email protected]
CC: [email protected]
CC: Eric Van Hensbergen <[email protected]>
CC: Ron Minnich <[email protected]>
CC: Latchesar Ionkov <[email protected]>
CC: [email protected]
Signed-off-by: Stefano Stabellini <[email protected]>
Reviewed-by: Juergen Gross <[email protected]>
Signed-off-by: Juergen Gross <[email protected]>
This commit is contained in:
Stefano Stabellini 2017-04-13 10:57:56 -07:00 • committed by Juergen Gross
commit 31d47266c6
1 changed files with 1 additions and 1 deletions
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2
net/9p/trans_xen.c
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@ -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)