[PATCH] i40iw: Avoid writing to freed memory

From: Mustafa Ismail <redacted>

iwpbl->iwmr points to the structure that contains iwpbl, 
which is iwmr. Setting this to NULL would result in 
writing to freed memory. So just free iwmr, and return. 

Fixes: d37498417947 ("i40iw: add files for iwarp interface")

Reported-by: Stefan Assmann <redacted>
Signed-off-by: Mustafa Ismail <redacted>
Signed-off-by: Shiraz Saleem <redacted>
---
 drivers/infiniband/hw/i40iw/i40iw_verbs.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index e8a6e91..567cb48 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c

@@ -1926,8 +1926,7 @@ static int i40iw_dereg_mr(struct ib_mr *ib_mr)
 		}
 		if (iwpbl->pbl_allocated)
 			i40iw_free_pble(iwdev->pble_rsrc, palloc);
-		kfree(iwpbl->iwmr);
-		iwpbl->iwmr = NULL;
+		kfree(iwmr);
 		return 0;
 	}
 

-- 
2.8.0

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