Re: [Nouveau] [PATCH -next] drm/nouveau:disp: Remove set but not used variable 'ret'

From: "libaokun (A)" <libaokun1@huawei.com>
To: <bskeggs@redhat.com>, <airlied@linux.ie>, <daniel@ffwll.ch>,
	<lyude@redhat.com>, <airlied@redhat.com>, <jajones@nvidia.com>,
	<dri-devel@lists.freedesktop.org>,
	<nouveau@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>
Cc: yuehaibing@huawei.com, weiyongjun1@huawei.com,
	yukuai3@huawei.com, yangjihong1@huawei.com
Subject: Re: [Nouveau] [PATCH -next] drm/nouveau:disp: Remove set but not used variable 'ret'
Date: Tue, 15 Jun 2021 10:01:22 +0800	[thread overview]
Message-ID: <caf4d2ad-f8ff-d014-360b-0945ee374304@huawei.com> (raw)
In-Reply-To: <20210515090155.186083-1-libaokun1@huawei.com>

ping

在 2021/5/15 17:01, Baokun Li 写道:
> From: "libaokun1@huawei.com" <libaokun1@huawei.com>
>
> Fixes gcc '-Wunused-but-set-variable' warning:
>
> drivers/gpu/drm/nouveau/dispnv50/disp.c: In function 'nv50_mstm_cleanup':
> drivers/gpu/drm/nouveau/dispnv50/disp.c:1389:6: warning:
>   variable ‘ret’ set but not used [-Wunused-but-set-variable]
>
> drivers/gpu/drm/nouveau/dispnv50/disp.c: In function 'nv50_mstm_prepare':
> drivers/gpu/drm/nouveau/dispnv50/disp.c:1413:6: warning:
>   variable ‘ret’ set but not used [-Wunused-but-set-variable]
>
> It never used since introduction.
>
> Signed-off-by: Baokun Li <libaokun1@huawei.com>
> ---
>   drivers/gpu/drm/nouveau/dispnv50/disp.c | 9 +++------
>   1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index 1c9c0cdf85db..5ee3f1fc76d7 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -1386,12 +1386,10 @@ nv50_mstm_cleanup(struct nv50_mstm *mstm)
>   {
>   	struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
>   	struct drm_encoder *encoder;
> -	int ret;
>   
>   	NV_ATOMIC(drm, "%s: mstm cleanup\n", mstm->outp->base.base.name);
> -	ret = drm_dp_check_act_status(&mstm->mgr);
> -
> -	ret = drm_dp_update_payload_part2(&mstm->mgr);
> +	drm_dp_check_act_status(&mstm->mgr);
> +	drm_dp_update_payload_part2(&mstm->mgr);
>   
>   	drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
>   		if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
> @@ -1410,10 +1408,9 @@ nv50_mstm_prepare(struct nv50_mstm *mstm)
>   {
>   	struct nouveau_drm *drm = nouveau_drm(mstm->outp->base.base.dev);
>   	struct drm_encoder *encoder;
> -	int ret;
>   
>   	NV_ATOMIC(drm, "%s: mstm prepare\n", mstm->outp->base.base.name);
> -	ret = drm_dp_update_payload_part1(&mstm->mgr);
> +	drm_dp_update_payload_part1(&mstm->mgr);
>   
>   	drm_for_each_encoder(encoder, mstm->outp->base.base.dev) {
>   		if (encoder->encoder_type == DRM_MODE_ENCODER_DPMST) {
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