[PATCH 3.16 020/129] IB/usnic: Fix out of bounds index check in query pkey

[Ben Hutchings]

3.16.70-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Gal Pressman <galpress@xxxxxxxxxx>

commit 4959d5da5737dd804255c75b8cea0a2929ce279a upstream.

The pkey table size is one element, index should be tested for > 0 instead
of > 1.

Fixes: e3cf00d0a87f ("IB/usnic: Add Cisco VIC low-level hardware driver")
Signed-off-by: Gal Pressman <galpress@xxxxxxxxxx>
Acked-by: Parvi Kaustubhi <pkaustub@xxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
@@ -410,7 +410,7 @@ int usnic_ib_query_gid(struct ib_device
 int usnic_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
 				u16 *pkey)
 {
-	if (index > 1)
+	if (index > 0)
 		return -EINVAL;
 
 	*pkey = 0xffff;