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Commit c5540a01 authored by Bart Van Assche's avatar Bart Van Assche Committed by Doug Ledford
Browse files

IB/rxe: Fix an skb leak 



Additionally, make it easier to detect skb leaks by issuing a warning
if a leak occurs.

Signed-off-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Cc: Andrew Boyer <andrew.boyer@dell.com>
Cc: Moni Shoua <monis@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 839f5ac0

drivers/infiniband/sw/rxe/rxe_comp.c

+14 −1
Original line number Diff line number Diff line
@@ -630,6 +630,7 @@ int rxe_completer(void *arg) 
			if (pkt) {

				rxe_drop_ref(pkt->qp);

				kfree_skb(skb);

				skb = NULL;

			}

			goto done;
@@ -653,6 +654,7 @@ int rxe_completer(void *arg) 
			    qp->qp_timeout_jiffies)

				mod_timer(&qp->retrans_timer,

					  jiffies + qp->qp_timeout_jiffies);

			WARN_ON_ONCE(skb);

			goto exit;



		case COMPST_ERROR_RETRY:
@@ -665,8 +667,10 @@ int rxe_completer(void *arg) 
			 */



			/* there is nothing to retry in this case */

			if (!wqe || (wqe->state == wqe_state_posted))

			if (!wqe || (wqe->state == wqe_state_posted)) {

				WARN_ON_ONCE(skb);

				goto exit;

			}



			if (qp->comp.retry_cnt > 0) {

				if (qp->comp.retry_cnt != 7)
@@ -688,8 +692,10 @@ int rxe_completer(void *arg) 
				if (pkt) {

					rxe_drop_ref(pkt->qp);

					kfree_skb(skb);

					skb = NULL;

				}



				WARN_ON_ONCE(skb);

				goto exit;



			} else {
@@ -709,6 +715,9 @@ int rxe_completer(void *arg) 
				mod_timer(&qp->rnr_nak_timer,

					  jiffies + rnrnak_jiffies(aeth_syn(pkt)

						& ~AETH_TYPE_MASK));

				rxe_drop_ref(pkt->qp);

				kfree_skb(skb);

				skb = NULL;

				goto exit;

			} else {

				wqe->status = IB_WC_RNR_RETRY_EXC_ERR;
@@ -724,8 +733,10 @@ int rxe_completer(void *arg) 
			if (pkt) {

				rxe_drop_ref(pkt->qp);

				kfree_skb(skb);

				skb = NULL;

			}



			WARN_ON_ONCE(skb);

			goto exit;

		}

	}
@@ -734,6 +745,7 @@ int rxe_completer(void *arg) 
	/* we come here if we are done with processing and want the task to

	 * exit from the loop calling us

	 */

	WARN_ON_ONCE(skb);

	rxe_drop_ref(qp);

	return -EAGAIN;
@@ -741,6 +753,7 @@ int rxe_completer(void *arg) 
	/* we come here if we have processed a packet we want the task to call

	 * us again to see if there is anything else to do

	 */

	WARN_ON_ONCE(skb);

	rxe_drop_ref(qp);

	return 0;

}