[PATCH][V2] IB/hns: fix memory leak on ah on error return path

[Colin King]

From: Colin Ian King <colin.k...@canonical.com>

When dmac is NULL, ah is not being freed on the error return path. Fix
this by kfree'ing it.

Detected by CoverityScan, CID#1452636 ("Resource Leak")

Fixes: d8966fcd4c25 ("IB/core: Use rdma_ah_attr accessor functions")
Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/infiniband/hw/hns/hns_roce_ah.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_ah.c 
b/drivers/infiniband/hw/hns/hns_roce_ah.c
index f78a733a63ec..d545302b8ef8 100644
--- a/drivers/infiniband/hw/hns/hns_roce_ah.c
+++ b/drivers/infiniband/hw/hns/hns_roce_ah.c
@@ -64,8 +64,10 @@ struct ib_ah *hns_roce_create_ah(struct ib_pd *ibpd,
        } else {
                u8 *dmac = rdma_ah_retrieve_dmac(ah_attr);
 
-               if (!dmac)
+               if (!dmac) {
+                       kfree(ah);
                        return ERR_PTR(-EINVAL);
+               }
                memcpy(ah->av.mac, dmac, ETH_ALEN);
        }
 
-- 
2.11.0