linux-kernel - Re: [PATCH v1] drm/tegra: Fix gpiod_get_from_of

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Date:   Wed, 10 Jul 2019 00:04:15 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Jon Hunter <jonathanh@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] drm/tegra: Fix gpiod_get_from_of_node() regression

09.07.2019 19:27, Jon Hunter пишет:
> 
> On 05/07/2019 16:11, Dmitry Osipenko wrote:
>> That function now returns ERR_PTR instead of NULL if "hpd-gpio" is not
>> present in device-tree. The offending patch missed to adapt the Tegra's
>> DRM driver for the API change.
>>
>> Fixes: 025bf37725f1 ("gpio: Fix return value mismatch of function gpiod_get_from_of_node()")
>> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>> ---
>>  drivers/gpu/drm/tegra/output.c | 8 ++++++--
>>  1 file changed, 6 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
>> index 274cb955e2e1..471d33809cd4 100644
>> --- a/drivers/gpu/drm/tegra/output.c
>> +++ b/drivers/gpu/drm/tegra/output.c
>> @@ -126,8 +126,12 @@ int tegra_output_probe(struct tegra_output *output)
>>  						       "nvidia,hpd-gpio", 0,
>>  						       GPIOD_IN,
>>  						       "HDMI hotplug detect");
>> -	if (IS_ERR(output->hpd_gpio))
>> -		return PTR_ERR(output->hpd_gpio);
>> +	if (IS_ERR(output->hpd_gpio)) {
>> +		if (PTR_ERR(output->hpd_gpio) == -ENOENT)
>> +			output->hpd_gpio = NULL;
>> +		else
>> +			return PTR_ERR(output->hpd_gpio);
>> +	}
>>  
>>  	if (output->hpd_gpio) {
>>  		err = gpiod_to_irq(output->hpd_gpio);
>>
> 
> Acked-by: Jon Hunter <jonathanh@...dia.com>

Thanks!