[PATCH] dma-buf/resv: fix exclusive fence get

[Koenig, Christian]

Hi Qiang,

oh, good point. Yes it certainly should.

Looks like I accidentally pushed it to the wrong branch.

Thanks,
Christian.

Am 10.10.19 um 16:27 schrieb Qiang Yu:
> Hi Chris,
>
> This fix has been pushed to drm-misc-next for a while. But Linux
> 5.4-rc kernels still does not have this fix.
> Should it be also pushed to drm-misc-fixes?
>
> Thanks,
> Qiang
>
>
> On Sun, Sep 22, 2019 at 8:50 PM Chris Wilson <chris at chris-wilson.co.uk> wrote:
>> Quoting Chris Wilson (2019-09-22 13:17:19)
>>> Quoting Qiang Yu (2019-09-22 08:49:00)
>>>> This causes kernel crash when testing lima driver.
>>>>
>>>> Cc: Christian König <christian.koenig at amd.com>
>>>> Fixes: b8c036dfc66f ("dma-buf: simplify reservation_object_get_fences_rcu a bit")
>>>> Signed-off-by: Qiang Yu <yuq825 at gmail.com>
>>>> ---
>>>>   drivers/dma-buf/dma-resv.c | 2 +-
>>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c
>>>> index 42a8f3f11681..709002515550 100644
>>>> --- a/drivers/dma-buf/dma-resv.c
>>>> +++ b/drivers/dma-buf/dma-resv.c
>>>> @@ -471,7 +471,7 @@ int dma_resv_get_fences_rcu(struct dma_resv *obj,
>>>>          if (pfence_excl)
>>>>                  *pfence_excl = fence_excl;
>>>>          else if (fence_excl)
>>>> -               shared[++shared_count] = fence_excl;
>>>> +               shared[shared_count++] = fence_excl;
>>> Oops.
>>>
>>> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
>> Applied, thanks for the fix.
>> -Chris