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* [PATCH v2] media: platform: mtk-mdp3: Fix return value check in mdp_probe()
@ 2022-12-01  2:35 Qiheng Lin
  2022-12-01  9:45 ` AngeloGioacchino Del Regno
  2022-12-02  8:42 ` Hans Verkuil
  0 siblings, 2 replies; 3+ messages in thread
From: Qiheng Lin @ 2022-12-01  2:35 UTC (permalink / raw)
  To: mchehab, matthias.bgg
  Cc: angelogioacchino.delregno, linux-media, linux-arm-kernel,
	linux-mediatek, linux-kernel, Qiheng Lin

In case of error, the function mtk_mutex_get()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().
And also fix the err_return case.

Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
Signed-off-by: Qiheng Lin <linqiheng@huawei.com>
---

v2:
 - Add fix the err_return case.

 drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
index c413e59d4286..48f3e32fe54e 100644
--- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
+++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
@@ -207,8 +207,8 @@ static int mdp_probe(struct platform_device *pdev)
 	}
 	for (i = 0; i < MDP_PIPE_MAX; i++) {
 		mdp->mdp_mutex[i] = mtk_mutex_get(&mm_pdev->dev);
-		if (!mdp->mdp_mutex[i]) {
-			ret = -ENODEV;
+		if (IS_ERR(mdp->mdp_mutex[i])) {
+			ret = PTR_ERR(mdp->mdp_mutex[i]);
 			goto err_return;
 		}
 	}
@@ -288,9 +288,10 @@ static int mdp_probe(struct platform_device *pdev)
 err_deinit_comp:
 	mdp_comp_destroy(mdp);
 err_return:
-	for (i = 0; i < MDP_PIPE_MAX; i++)
-		if (mdp)
-			mtk_mutex_put(mdp->mdp_mutex[i]);
+	if (mdp)
+		for (i = 0; i < MDP_PIPE_MAX; i++)
+			if (!IS_ERR_OR_NULL(mdp->mdp_mutex[i]))
+				mtk_mutex_put(mdp->mdp_mutex[i]);
 	kfree(mdp);
 	dev_dbg(dev, "Errno %d\n", ret);
 	return ret;
-- 
2.32.0


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^ permalink raw reply related	[flat|nested] 3+ messages in thread
* Re: [PATCH v2] media: platform: mtk-mdp3: Fix return value check in mdp_probe()
  2022-12-01  2:35 [PATCH v2] media: platform: mtk-mdp3: Fix return value check in mdp_probe() Qiheng Lin
@ 2022-12-01  9:45 ` AngeloGioacchino Del Regno
  2022-12-02  8:42 ` Hans Verkuil
  1 sibling, 0 replies; 3+ messages in thread
From: AngeloGioacchino Del Regno @ 2022-12-01  9:45 UTC (permalink / raw)
  To: Qiheng Lin, mchehab, matthias.bgg
  Cc: linux-media, linux-arm-kernel, linux-mediatek, linux-kernel

Il 01/12/22 03:35, Qiheng Lin ha scritto:
> In case of error, the function mtk_mutex_get()
> returns ERR_PTR() and never returns NULL. The NULL test in the
> return value check should be replaced with IS_ERR().
> And also fix the err_return case.
> 
> Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
> Signed-off-by: Qiheng Lin <linqiheng@huawei.com>

Thanks!

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>



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^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [PATCH v2] media: platform: mtk-mdp3: Fix return value check in mdp_probe()
  2022-12-01  2:35 [PATCH v2] media: platform: mtk-mdp3: Fix return value check in mdp_probe() Qiheng Lin
  2022-12-01  9:45 ` AngeloGioacchino Del Regno
@ 2022-12-02  8:42 ` Hans Verkuil
  1 sibling, 0 replies; 3+ messages in thread
From: Hans Verkuil @ 2022-12-02  8:42 UTC (permalink / raw)
  To: Qiheng Lin, mchehab, matthias.bgg
  Cc: angelogioacchino.delregno, linux-media, linux-arm-kernel,
	linux-mediatek, linux-kernel

Hi Qiheng,

Can you rebase on top of the latest staging tree? (https://git.linuxtv.org/media_stage.git/)

This patch no longer applies.

Thanks!

	Hans

On 01/12/2022 03:35, Qiheng Lin wrote:
> In case of error, the function mtk_mutex_get()
> returns ERR_PTR() and never returns NULL. The NULL test in the
> return value check should be replaced with IS_ERR().
> And also fix the err_return case.
> 
> Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver")
> Signed-off-by: Qiheng Lin <linqiheng@huawei.com>
> ---
> 
> v2:
>  - Add fix the err_return case.
> 
>  drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> index c413e59d4286..48f3e32fe54e 100644
> --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c
> @@ -207,8 +207,8 @@ static int mdp_probe(struct platform_device *pdev)
>  	}
>  	for (i = 0; i < MDP_PIPE_MAX; i++) {
>  		mdp->mdp_mutex[i] = mtk_mutex_get(&mm_pdev->dev);
> -		if (!mdp->mdp_mutex[i]) {
> -			ret = -ENODEV;
> +		if (IS_ERR(mdp->mdp_mutex[i])) {
> +			ret = PTR_ERR(mdp->mdp_mutex[i]);
>  			goto err_return;
>  		}
>  	}
> @@ -288,9 +288,10 @@ static int mdp_probe(struct platform_device *pdev)
>  err_deinit_comp:
>  	mdp_comp_destroy(mdp);
>  err_return:
> -	for (i = 0; i < MDP_PIPE_MAX; i++)
> -		if (mdp)
> -			mtk_mutex_put(mdp->mdp_mutex[i]);
> +	if (mdp)
> +		for (i = 0; i < MDP_PIPE_MAX; i++)
> +			if (!IS_ERR_OR_NULL(mdp->mdp_mutex[i]))
> +				mtk_mutex_put(mdp->mdp_mutex[i]);
>  	kfree(mdp);
>  	dev_dbg(dev, "Errno %d\n", ret);
>  	return ret;


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^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-12-02  8:44 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-12-01  2:35 [PATCH v2] media: platform: mtk-mdp3: Fix return value check in mdp_probe() Qiheng Lin
2022-12-01  9:45 ` AngeloGioacchino Del Regno
2022-12-02  8:42 ` Hans Verkuil

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