linux-kernel - Re: [PATCH] media: Fix compilation error

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Date:   Wed, 7 Apr 2021 16:45:34 +0300
From:   Mikko Perttunen <mperttunen@...dia.com>
To:     Hans Verkuil <hverkuil@...all.nl>,
        Bixuan Cui <cuibixuan@...wei.com>,
        <linux-kernel@...r.kernel.org>, <linux-media@...r.kernel.org>
CC:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <skomatineni@...dia.com>, <mchehab@...nel.org>,
        <treding@...dia.com>, <john.wanghui@...wei.com>
Subject: Re: [PATCH] media: Fix compilation error

On 7.4.2021 16.29, Hans Verkuil wrote:
> On 02/04/2021 09:40, Bixuan Cui wrote:
>> Fix the error:
>>
>> drivers/staging/media/tegra-video/vi.c:1180:4:
>> error: implicit declaration of function 'host1x_syncpt_free' [-Werror,-Wimplicit-function-declaration]
> 
> Against what tree is this being built? The mainline kernel doesn't have
> host1x_syncpt_put, only host1x_syncpt_free.

This change was done only very recently, it's in linux-next and 
submitted for 5.13. I missed this one host1x_syncpt_free call in vi.c, 
but Thierry has already applied an equivalent patch on his end so the 
issue should be resolved.

Thanks,
Mikko

> 
> Also, the subject line is very vague, something like this is much more descriptive:
> 
> [PATCH] media: tegra-video: replace host1x_syncpt_free by host1x_syncpt_put
> 
> Regards,
> 
> 	Hans
> 
>>
>> Fixes: 3028a00c55bf ('gpu: host1x: Cleanup and refcounting for syncpoints')
>> Reported-by: Hulk Robot <hulkci@...wei.com>
>> Signed-off-by: Bixuan Cui <cuibixuan@...wei.com>
>> ---
>>   drivers/staging/media/tegra-video/vi.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
>> index 7e0cb5529b49..df5ca3596470 100644
>> --- a/drivers/staging/media/tegra-video/vi.c
>> +++ b/drivers/staging/media/tegra-video/vi.c
>> @@ -1177,7 +1177,7 @@ static int tegra_channel_host1x_syncpt_init(struct tegra_vi_channel *chan)
>>   		mw_sp = host1x_syncpt_request(&vi->client, flags);
>>   		if (!mw_sp) {
>>   			dev_err(vi->dev, "failed to request memory ack syncpoint\n");
>> -			host1x_syncpt_free(fs_sp);
>> +			host1x_syncpt_put(fs_sp);
>>   			ret = -ENOMEM;
>>   			goto free_syncpts;
>>   		}
>>
>