qedr: Fix possible memory leak in qedr_create_qp()

'qp' is malloced in qedr_create_qp() and should be freed before leaving
from the error handling cases, otherwise it will cause memory leak.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Ram Amrani <Ram.Amrani@cavium.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/qedr/verbs.c

@@ -1479,6 +1479,7 @@ struct ib_qp *qedr_create_qp(struct ib_pd *ibpd,
 	struct qedr_ucontext *ctx = NULL;
 	struct qedr_create_qp_ureq ureq;
 	struct qedr_qp *qp;
+	struct ib_qp *ibqp;
 	int rc = 0;
 
 	DP_DEBUG(dev, QEDR_MSG_QP, "create qp: called from %s, pd=%p\n",
@@ -1488,13 +1489,13 @@ struct ib_qp *qedr_create_qp(struct ib_pd *ibpd,
 	if (rc)
 		return ERR_PTR(rc);
 
+	if (attrs->srq)
+		return ERR_PTR(-EINVAL);
+
 	qp = kzalloc(sizeof(*qp), GFP_KERNEL);
 	if (!qp)
 		return ERR_PTR(-ENOMEM);
 
-	if (attrs->srq)
-		return ERR_PTR(-EINVAL);
-
 	DP_DEBUG(dev, QEDR_MSG_QP,
 		 "create qp: sq_cq=%p, sq_icid=%d, rq_cq=%p, rq_icid=%d\n",
 		 get_qedr_cq(attrs->send_cq),
@@ -1510,7 +1511,10 @@ struct ib_qp *qedr_create_qp(struct ib_pd *ibpd,
 			       "create qp: unexpected udata when creating GSI QP\n");
 			goto err0;
 		}
-		return qedr_create_gsi_qp(dev, attrs, qp);
+		ibqp = qedr_create_gsi_qp(dev, attrs, qp);
+		if (IS_ERR(ibqp))
+			kfree(qp);
+		return ibqp;
 	}
 
 	memset(&in_params, 0, sizeof(in_params));