linux-kernel - Re: [PATCH] drm: replace IS_ERR and PTR_ERR with PTR_ERR_OR

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Date:   Tue, 7 Jan 2020 08:47:40 +0200
From:   Tomi Valkeinen <tomi.valkeinen@...com>
To:     yu kuai <yukuai3@...wei.com>
CC:     Maxime Ripard <mripard@...nel.org>, <airlied@...ux.ie>,
        <daniel@...ll.ch>, <wens@...e.org>, <jernej.skrabec@...l.net>,
        <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-tegra@...r.kernel.org>, <zhengbin13@...wei.com>,
        <yi.zhang@...wei.com>
Subject: Re: [PATCH] drm: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO

On 27/12/2019 13:54, Maxime Ripard wrote:
> On Wed, Dec 25, 2019 at 09:20:42PM +0800, yu kuai wrote:
>> no functional change, just to make the code simpler
>>
>> Signed-off-by: yu kuai <yukuai3@...wei.com>
>> ---
>>   drivers/gpu/drm/omapdrm/dss/hdmi4.c         | 5 +----
>>   drivers/gpu/drm/omapdrm/dss/hdmi4_core.c    | 6 ++----
>>   drivers/gpu/drm/omapdrm/dss/hdmi5_core.c    | 4 +---
>>   drivers/gpu/drm/omapdrm/dss/hdmi_phy.c      | 4 +---
>>   drivers/gpu/drm/sun4i/sun4i_dotclock.c      | 4 +---
>>   drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c      | 4 +---
>>   drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c | 4 +---
>>   drivers/gpu/drm/sun4i/sun8i_hdmi_phy_clk.c  | 5 +----
>>   drivers/gpu/drm/tegra/drm.c                 | 4 +---
>>   drivers/gpu/drm/tegra/gem.c                 | 4 +---
>>   10 files changed, 11 insertions(+), 33 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4.c b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
>> index 0f557fad4513..eb71baedf19e 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/hdmi4.c
>> +++ b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
>> @@ -587,10 +587,7 @@ static int hdmi_audio_register(struct omap_hdmi *hdmi)
>>   		&hdmi->pdev->dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO,
>>   		&pdata, sizeof(pdata));
>>
>> -	if (IS_ERR(hdmi->audio_pdev))
>> -		return PTR_ERR(hdmi->audio_pdev);
>> -
>> -	return 0;
>> +	return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
>>   }
>>
>>   /* -----------------------------------------------------------------------------
>> diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c b/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
>> index ea5d5c228534..fdd73fb73653 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
>> +++ b/drivers/gpu/drm/omapdrm/dss/hdmi4_core.c
>> @@ -924,8 +924,6 @@ int hdmi4_core_init(struct platform_device *pdev, struct hdmi_core_data *core)
>>
>>   	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
>>   	core->base = devm_ioremap_resource(&pdev->dev, res);
>> -	if (IS_ERR(core->base))
>> -		return PTR_ERR(core->base);
>> -
>> -	return 0;
>> +
>> +	return PTR_ERR_OR_ZERO(core->base);
>>   }
>> diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi5_core.c b/drivers/gpu/drm/omapdrm/dss/hdmi5_core.c
>> index ff4d35c8771f..30454bc9de78 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/hdmi5_core.c
>> +++ b/drivers/gpu/drm/omapdrm/dss/hdmi5_core.c
>> @@ -908,8 +908,6 @@ int hdmi5_core_init(struct platform_device *pdev, struct hdmi_core_data *core)
>>
>>   	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
>>   	core->base = devm_ioremap_resource(&pdev->dev, res);
>> -	if (IS_ERR(core->base))
>> -		return PTR_ERR(core->base);
>>
>> -	return 0;
>> +	return PTR_ERR_OR_ZERO(core->base);
>>   }
>> diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi_phy.c b/drivers/gpu/drm/omapdrm/dss/hdmi_phy.c
>> index 00bbf24488c1..bbc02d5aa8fb 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/hdmi_phy.c
>> +++ b/drivers/gpu/drm/omapdrm/dss/hdmi_phy.c
>> @@ -191,8 +191,6 @@ int hdmi_phy_init(struct platform_device *pdev, struct hdmi_phy_data *phy,
>>
>>   	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy");
>>   	phy->base = devm_ioremap_resource(&pdev->dev, res);
>> -	if (IS_ERR(phy->base))
>> -		return PTR_ERR(phy->base);
>>
>> -	return 0;
>> +	return PTR_ERR_OR_ZERO(phy->base);
>>   }
>> diff --git a/drivers/gpu/drm/sun4i/sun4i_dotclock.c b/drivers/gpu/drm/sun4i/sun4i_dotclock.c
>> index 417ade3d2565..84c04d8192b3 100644
>> --- a/drivers/gpu/drm/sun4i/sun4i_dotclock.c
>> +++ b/drivers/gpu/drm/sun4i/sun4i_dotclock.c
>> @@ -191,10 +191,8 @@ int sun4i_dclk_create(struct device *dev, struct sun4i_tcon *tcon)
>>   	dclk->hw.init = &init;
>>
>>   	tcon->dclk = clk_register(dev, &dclk->hw);
>> -	if (IS_ERR(tcon->dclk))
>> -		return PTR_ERR(tcon->dclk);
>>
>> -	return 0;
>> +	return PTR_ERR_OR_ZERO(tcon->dclk);
> 
> This has been submitted a couple of times already. It's harder to
> maintain and not easier to read.
> 
> Please remove sun4i from your patch

Nack for the omapdrm parts too, for the same reasons.

  Tomi

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