Re: [PATCH 24/61] net/9p: Prefer IS_ERR_OR_NULL over manual NULL check

[Christian Schoenebeck <linux_oss@crudebyte.com>]

On Tuesday, 10 March 2026 12:48:50 CET Philipp Hahn wrote:
> Prefer using IS_ERR_OR_NULL() over using IS_ERR() and a manual NULL
> check.
> 
> Change generated with coccinelle.
> 
> To: Eric Van Hensbergen <ericvh@kernel.org>
> To: Latchesar Ionkov <lucho@ionkov.net>
> To: Dominique Martinet <asmadeus@codewreck.org>
> To: Christian Schoenebeck <linux_oss@crudebyte.com>
> To: "David S. Miller" <davem@davemloft.net>
> To: Eric Dumazet <edumazet@google.com>
> To: Jakub Kicinski <kuba@kernel.org>
> To: Paolo Abeni <pabeni@redhat.com>
> To: Simon Horman <horms@kernel.org>
> Cc: v9fs@lists.linux.dev
> Cc: netdev@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Philipp Hahn <phahn-oss@avm.de>
> ---
>  include/net/9p/client.h | 2 +-
>  net/9p/trans_rdma.c     | 8 ++++----
>  2 files changed, 5 insertions(+), 5 deletions(-)

Reviewed-by: Christian Schoenebeck <linux_oss@crudebyte.com>
 
> diff --git a/include/net/9p/client.h b/include/net/9p/client.h
> index
> 838a94218b593f3fb19e6827c472753380193461..4bde6bd716f323c819745e64c7aac0dea
> 7beb72f 100644 --- a/include/net/9p/client.h
> +++ b/include/net/9p/client.h
> @@ -364,7 +364,7 @@ static inline struct p9_fid *p9_fid_get(struct p9_fid
> *fid)
> 
>  static inline int p9_fid_put(struct p9_fid *fid)
>  {
> -	if (!fid || IS_ERR(fid))
> +	if (IS_ERR_OR_NULL(fid))
>  		return 0;
> 
>  	if (tracepoint_enabled(9p_fid_ref))
> diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c
> index
> aa5bd74d333f3b5e6fd1e4344d26bc0201ff7f7f..60461344b536bcb6e94112aace75a88b6
> a99ad86 100644 --- a/net/9p/trans_rdma.c
> +++ b/net/9p/trans_rdma.c
> @@ -252,16 +252,16 @@ static void rdma_destroy_trans(struct p9_trans_rdma
> *rdma) if (!rdma)
>  		return;
> 
> -	if (rdma->qp && !IS_ERR(rdma->qp))
> +	if (!IS_ERR_OR_NULL(rdma->qp))
>  		ib_destroy_qp(rdma->qp);
> 
> -	if (rdma->pd && !IS_ERR(rdma->pd))
> +	if (!IS_ERR_OR_NULL(rdma->pd))
>  		ib_dealloc_pd(rdma->pd);
> 
> -	if (rdma->cq && !IS_ERR(rdma->cq))
> +	if (!IS_ERR_OR_NULL(rdma->cq))
>  		ib_free_cq(rdma->cq);
> 
> -	if (rdma->cm_id && !IS_ERR(rdma->cm_id))
> +	if (!IS_ERR_OR_NULL(rdma->cm_id))
>  		rdma_destroy_id(rdma->cm_id);
> 
>  	kfree(rdma);