From: zhong jiang <zhongjiang@huawei.com>
Date: Thu, 20 Sep 2018 17:52:42 +0800
Subject: RDMA/cxgb4: remove redundant null pointer check before kfree_skb
Patch-mainline: v4.20-rc1
Git-commit: 26f91da29650177364564d8183907d0229e9afbc
References: bsc#1104276 FATE#325935

kfree_skb has taken the null pointer into account. hence it is safe
to remove the redundant null pointer check before kfree_skb.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Acked-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/cxgb4/cm.c |    3 +--
 drivers/infiniband/hw/cxgb4/qp.c |    3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -405,8 +405,7 @@ void _c4iw_free_ep(struct kref *kref)
 				 ep->com.local_addr.ss_family);
 		dst_release(ep->dst);
 		cxgb4_l2t_release(ep->l2t);
-		if (ep->mpa_skb)
-			kfree_skb(ep->mpa_skb);
+		kfree_skb(ep->mpa_skb);
 	}
 	if (!skb_queue_empty(&ep->com.ep_skb_list))
 		skb_queue_purge(&ep->com.ep_skb_list);
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -2814,8 +2814,7 @@ err_free_queue:
 	free_srq_queue(srq, ucontext ? &ucontext->uctx : &rhp->rdev.uctx,
 		       srq->wr_waitp);
 err_free_skb:
-	if (srq->destroy_skb)
-		kfree_skb(srq->destroy_skb);
+	kfree_skb(srq->destroy_skb);
 err_free_srq_idx:
 	c4iw_free_srq_idx(&rhp->rdev, srq->idx);
 err_free_wr_wait: