linux-kernel - Re: [PATCH] dma-buf: actually set signaling bit for private sub fences

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Date:   Wed, 1 Feb 2023 11:34:00 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Christian König <christian.koenig@....com>,
        Danilo Krummrich <dakr@...hat.com>, Arvind.Yadav@....com,
        sumit.semwal@...aro.org, gustavo@...ovan.org
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-media@...r.kernel.org
Subject: Re: [PATCH] dma-buf: actually set signaling bit for private sub
 fences



Am 27.01.23 um 08:49 schrieb Christian König:
> Am 26.01.23 um 23:25 schrieb Danilo Krummrich:
>> On 1/26/23 07:58, Christian König wrote:
>>> Am 26.01.23 um 01:28 schrieb Danilo Krummrich:
>>>> In dma_fence_allocate_private_stub() set the signaling bit of the newly
>>>> allocated private stub fence rather than the signaling bit of the
>>>> shared dma_fence_stub.
>>>>
>>>> Fixes: c85d00d4fd8b ("dma-buf: set signaling bit for the stub fence")
>>>> Signed-off-by: Danilo Krummrich <dakr@...hat.com>
>>>
>>> Good catch, Reviewed-by: Christian König <christian.koenig@....com>
>>>
>>> Should I push it upstream as well or do you have commit access?
>>
>> Thanks, I can push it to drm-misc-next.
> 
> This is clearly a bug fix so better push this to drm-misc-fixes and 
> maybe even add a CC:stable tag.

I have cherry-picked the patch into drm-misc-next-fixes.

> 
> Christian.
> 
>>
>>>
>>>> ---
>>>>   drivers/dma-buf/dma-fence.c | 2 +-
>>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/dma-buf/dma-fence.c b/drivers/dma-buf/dma-fence.c
>>>> index 406b4e26f538..0de0482cd36e 100644
>>>> --- a/drivers/dma-buf/dma-fence.c
>>>> +++ b/drivers/dma-buf/dma-fence.c
>>>> @@ -167,7 +167,7 @@ struct dma_fence 
>>>> *dma_fence_allocate_private_stub(void)
>>>>                  0, 0);
>>>>       set_bit(DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
>>>> -        &dma_fence_stub.flags);
>>>> +        &fence->flags);
>>>>       dma_fence_signal(fence);
>>>
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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