2020-11-17 06:15:05

by Yang Yingliang

Subject: [PATCH] drm/omap: dmm_tiler: fix return error code in omap_dmm_probe()

Return -ENOMEM when allocating refill memory failed.

Fixes: 71e8831f6407 ("drm/omap: DMM/TILER support for OMAP4+ platform")
Reported-by: Hulk Robot <[email protected]>
Signed-off-by: Yang Yingliang <[email protected]>
---
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
index 42ec51bb7b1b..7f4317248812 100644
--- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
+++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
@@ -889,6 +889,7 @@ static int omap_dmm_probe(struct platform_device *dev)
&omap_dmm->refill_pa, GFP_KERNEL);
if (!omap_dmm->refill_va) {
dev_err(&dev->dev, "could not allocate refill memory\n");
+ ret = -ENOMEM;
goto fail;
}

--
2.25.1

2020-11-17 13:46:34

by Thomas Zimmermann

Subject: Re: [PATCH] drm/omap: dmm_tiler: fix return error code in omap_dmm_probe()

Hi

Am 17.11.20 um 07:10 schrieb Yang Yingliang:
> Return -ENOMEM when allocating refill memory failed.
>
> Fixes: 71e8831f6407 ("drm/omap: DMM/TILER support for OMAP4+ platform")
> Reported-by: Hulk Robot <[email protected]>
> Signed-off-by: Yang Yingliang <[email protected]>
> ---
> drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
> index 42ec51bb7b1b..7f4317248812 100644
> --- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
> +++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
> @@ -889,6 +889,7 @@ static int omap_dmm_probe(struct platform_device *dev)
> &omap_dmm->refill_pa, GFP_KERNEL);
> if (!omap_dmm->refill_va) {
> dev_err(&dev->dev, "could not allocate refill memory\n");
> + ret = -ENOMEM;

Reviewed-by: Thomas Zimmermann <[email protected]>

Thanks for the patch. I'll add it to drm-misc-next. There are more such
errors here. If the very first allocation fails, the function returns
-EFAULT, which makes no sense.

Best regards
Thomas

> goto fail;
> }
>
>

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

2020-11-26 09:49:56

by Tomi Valkeinen

Subject: Re: [PATCH] drm/omap: dmm_tiler: fix return error code in omap_dmm_probe()

On 17/11/2020 15:41, Thomas Zimmermann wrote:
> Hi
>
> Am 17.11.20 um 07:10 schrieb Yang Yingliang:
>> Return -ENOMEM when allocating refill memory failed.
>>
>> Fixes: 71e8831f6407 ("drm/omap: DMM/TILER support for OMAP4+ platform")
>> Reported-by: Hulk Robot <[email protected]>
>> Signed-off-by: Yang Yingliang <[email protected]>
>> ---
>> drivers/gpu/drm/omapdrm/omap_dmm_tiler.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
>> index 42ec51bb7b1b..7f4317248812 100644
>> --- a/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
>> +++ b/drivers/gpu/drm/omapdrm/omap_dmm_tiler.c
>> @@ -889,6 +889,7 @@ static int omap_dmm_probe(struct platform_device *dev)
>> &omap_dmm->refill_pa, GFP_KERNEL);
>> if (!omap_dmm->refill_va) {
>> dev_err(&dev->dev, "could not allocate refill memory\n");
>> + ret = -ENOMEM;
>
> Reviewed-by: Thomas Zimmermann <[email protected]>
>
> Thanks for the patch. I'll add it to drm-misc-next. There are more such
> errors here. If the very first allocation fails, the function returns
> -EFAULT, which makes no sense.

Indeed. -EFAULT is quite an odd default value for ret... I'll drop the default and assign a real
error value where needed.

Tomi

--
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki