[PATCH] ib/ehca: fix in_wc handling in process_mad()

[Alexander Schmidt]

If the caller does not pass a valid in_wc to process_mad(),
return MAD failure as it is not possible to generate a valid
MAD redirect response.

Signed-off-by: Alexander Schmidt <alexs@xxxxxxxxxxxxxxxxxx>
---

Hi Roland,

this is another patch we would like to get in your next tree for
2.6.34.

 drivers/infiniband/hw/ehca/ehca_sqp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-2.6.orig/drivers/infiniband/hw/ehca/ehca_sqp.c
+++ linux-2.6/drivers/infiniband/hw/ehca/ehca_sqp.c
@@ -222,7 +222,7 @@ int ehca_process_mad(struct ib_device *i
 {
 	int ret;
 
-	if (!port_num || port_num > ibdev->phys_port_cnt)
+	if (!port_num || port_num > ibdev->phys_port_cnt || !in_wc)
 		return IB_MAD_RESULT_FAILURE;
 
 	/* accept only pma request */
--
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