Re:Re: [PATCH] drm/exynos: remove no need devm_kfree in probe [re-send, welcome any comments]

[Bernard]

From: Sam Ravnborg <sam at ravnborg.org>
Date: 2020-05-08 15:52:10
To:  Bernard <bernard at vivo.com>
Cc:  Inki Dae <inki.dae at samsung.com>,Joonyoung Shim <jy0922.shim at samsung.com>,Seung-Woo Kim <sw0312.kim at samsung.com>,Kyungmin Park <kyungmin.park at samsung.com>,David Airlie <airlied at linux.ie>,Daniel Vetter <daniel at ffwll.ch>,Kukjin Kim <kgene at kernel.org>,Krzysztof Kozlowski <krzk at kernel.org>,dri-devel at lists.freedesktop.org,linux-arm-kernel at lists.infradead.org,linux-samsung-soc at vger.kernel.org,linux-kernel at vger.kernel.org,opensource.kernel at vivo.com
Subject: Re: [PATCH] drm/exynos: remove no need devm_kfree in probe [re-send, welcome any comments]>Hi Bernard.
>
>On Wed, May 06, 2020 at 08:49:03PM +0800, Bernard wrote:
>> Remove no need devm_kfree in probe.
>> The change is to make the code a bit more readable
>> 
>> Signed-off-by: Bernard Zhao <bernard at vivo.com>
>
>Could you take a closer look and fix similar patterns
>in the rest of the driver?
>For example in exynos_dpi_probe()
>
>Is would be nice to only have to review for this
>type of changes once, so one patch-set is preferred
>over single patches over time.
>
>You can add:
>Reviewed-by: Sam Ravnborg <sam at ravnborg.org>
>
>to this patch when you re-send a new series.
>
>Thanks,
>	Sam

Hi
Sure, this is also a good chance for me to learn this code.
I will re-check this part of the exynos driver code to see 
if there are similar patterns, and then re-send a patch series.

Regards,
Bernard

>> ---
>>  drivers/gpu/drm/exynos/exynos_drm_dpi.c | 10 +++-------
>>  1 file changed, 3 insertions(+), 7 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dpi.c b/drivers/gpu/drm/exynos/exynos_drm_dpi.c
>> index 43fa0f26c052..e06f7d7a6695 100644
>> --- a/drivers/gpu/drm/exynos/exynos_drm_dpi.c
>> +++ b/drivers/gpu/drm/exynos/exynos_drm_dpi.c
>> @@ -181,10 +181,8 @@ static int exynos_dpi_parse_dt(struct exynos_dpi *ctx)
>>  			return -ENOMEM;
>>  
>>  		ret = of_get_videomode(dn, vm, 0);
>> -		if (ret < 0) {
>> -			devm_kfree(dev, vm);
>> +		if (ret < 0)
>>  			return ret;
>> -		}
>>  
>>  		ctx->vm = vm;
>>  
>> @@ -233,10 +231,8 @@ struct drm_encoder *exynos_dpi_probe(struct device *dev)
>>  	ctx->dev = dev;
>>  
>>  	ret = exynos_dpi_parse_dt(ctx);
>> -	if (ret < 0) {
>> -		devm_kfree(dev, ctx);
>> -		return NULL;
>> -	}
>> +	if (ret < 0)
>> +		return ERR_PTR(ret);
>>  
>>  	if (ctx->panel_node) {
>>  		ctx->panel = of_drm_find_panel(ctx->panel_node);
>> -- 
>> 2.26.2
>> 
>> 
>> [re-send, welcome any comments]
>> Regards,
>> Bernard
>> 
>> 
>> 
>> 
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