2018-09-20 10:05:33

by zhong jiang

[permalink] [raw]
Subject: [PATCH] RDMA/cxgb4: remove redundant null pointer check before kfree_skb

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 <[email protected]>
---
drivers/infiniband/hw/cxgb4/cm.c | 3 +--
drivers/infiniband/hw/cxgb4/qp.c | 3 +--
2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 0f83cbe..615413b 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -403,8 +403,7 @@ 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);
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index 347fe18..e78dd9a 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -2813,8 +2813,7 @@ struct ib_srq *c4iw_create_srq(struct ib_pd *pd, struct ib_srq_init_attr *attrs,
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:
--
1.7.12.4



2018-09-20 14:32:03

by Steve Wise

[permalink] [raw]
Subject: Re: [PATCH] RDMA/cxgb4: remove redundant null pointer check before kfree_skb



On 9/20/2018 4:52 AM, zhong jiang wrote:
> 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 <[email protected]>
> ---
> drivers/infiniband/hw/cxgb4/cm.c | 3 +--
> drivers/infiniband/hw/cxgb4/qp.c | 3 +--
> 2 files changed, 2 insertions(+), 4 deletions(-)

Acked-by: Steve Wise <[email protected]>

2018-09-21 16:06:19

by Doug Ledford

[permalink] [raw]
Subject: Re: [PATCH] RDMA/cxgb4: remove redundant null pointer check before kfree_skb

On Thu, 2018-09-20 at 17:52 +0800, zhong jiang wrote:
> 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 <[email protected]>

Applied to for-next, thanks.

--
Doug Ledford <[email protected]>
GPG KeyID: B826A3330E572FDD
Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD


Attachments:
signature.asc (849.00 B)
This is a digitally signed message part