[PATCH v2 net-next 04/15] qed: prevent possible double-frees of the chains

[Alexander Lobakin]

Zero-initialize chain on qed_chain_free(), so it couldn't be freed
twice and provoke undefined behaviour.

Signed-off-by: Alexander Lobakin <alobakin@xxxxxxxxxxx>
Signed-off-by: Igor Russkikh <irusskikh@xxxxxxxxxxx>
Signed-off-by: Michal Kalderon <michal.kalderon@xxxxxxxxxxx>
---
 drivers/net/ethernet/qlogic/qed/qed_chain.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_chain.c b/drivers/net/ethernet/qlogic/qed/qed_chain.c
index bab02ff32514..917b783433f7 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_chain.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_chain.c
@@ -92,8 +92,10 @@ void qed_chain_free(struct qed_dev *cdev, struct qed_chain *chain)
 		qed_chain_free_pbl(cdev, chain);
 		break;
 	default:
-		break;
+		return;
 	}
+
+	qed_chain_init_mem(chain, NULL, 0);
 }
 
 static int
-- 
2.25.1