linux-kernel - Re: [PATCH] drm/omap: dmm_tiler: fix return error code in omap_dmm

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Message-ID: <5b671522-1a98-3935-33e6-bfa307debb53@ti.com>
Date:   Thu, 26 Nov 2020 08:19:34 +0200
From:   Tomi Valkeinen <tomi.valkeinen@...com>
To:     Thomas Zimmermann <tzimmermann@...e.de>,
        Yang Yingliang <yangyingliang@...wei.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
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 <hulkci@...wei.com>
>> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
>> ---
>>  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 <tzimmermann@...e.de>
> 
> 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

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