linux-kernel - Re: [PATCH] drm: xlnx: zynqmp_dpsub: Add missing check for dma_set

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Message-ID: <70a188a2-7d56-9798-ecc9-700c9e8fd57f@ideasonboard.com>
Date:   Wed, 7 Jun 2023 12:38:14 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jiasheng Jiang <jiasheng@...as.ac.cn>
Cc:     hyun.kwon@...inx.com, airlied@...il.com, daniel@...ll.ch,
        michal.simek@....com, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: xlnx: zynqmp_dpsub: Add missing check for
 dma_set_mask

On 07/06/2023 08:07, Laurent Pinchart wrote:
> Hello Jiasheng,
> 
> Thank you for the patch.
> 
> On Wed, Jun 07, 2023 at 10:05:29AM +0800, Jiasheng Jiang wrote:
>> Add check for dma_set_mask() and return the error if it fails.
>>
>> Fixes: d76271d22694 ("drm: xlnx: DRM/KMS driver for Xilinx ZynqMP DisplayPort Subsystem")
>> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
>> ---
>>   drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 4 +++-
>>   1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
>> index bab862484d42..068413be6527 100644
>> --- a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
>> +++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
>> @@ -227,7 +227,9 @@ static int zynqmp_dpsub_probe(struct platform_device *pdev)
>>   	dpsub->dev = &pdev->dev;
>>   	platform_set_drvdata(pdev, dpsub);
>>   
>> -	dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));
>> +	ret = dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));
>> +	if (ret)
>> +		return ret;
> 
> This seems reasonable.
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> 
> Tomi, would you be able to quickly test this ?

Works for me.

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>

  Tomi