[Mesa-stable] [Mesa-dev] [PATCH] i965/miptree: Fail gracefully when make_surface returns NULL

[Ian Romanick]

On 03/27/2018 04:49 AM, Juan A. Suarez Romero wrote:
> On Thu, 2018-01-04 at 11:38 -0800, Ian Romanick wrote:
>> On 01/03/2018 01:27 PM, Jason Ekstrand wrote:
>>> This patch looks good in isolation and you can have my rb.  However,
>>> this all a bit concerning and it makes me wonder if we're papering over
>>> the real bug.
>>
>> It may be a bit of both.  There's also some debate in the bugzilla about
>> whether or not this fixes the original bug or if there are actually two
>> problems or ...  I'm going to wait a bit to push this, and I'm going to
>> try to investigate the other crash that has been observed.
> 
> What happened at the end with this patch? Still waiting to push, or has it been
> superseded?

The original bug was fixed a different way, so this patch was abandoned.

> Asking because it was nominated for 17.3, but didn't land in master.
> 
> Thanks in advance.
> 
> 
> 	J.A.
> 
>>> On January 3, 2018 12:41:56 "Ian Romanick" <idr at freedesktop.org> wrote:
>>>
>>>> From: Ian Romanick <ian.d.romanick at intel.com>
>>>>
>>>> Every other caller of make_surface does something sensible when NULL is
>>>> returned.
>>>>
>>>> Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
>>>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104214
>>>> Tested-by: Cyril <cyril.duez at gmail.com>
>>>> Cc: "17.3" <mesa-stable at lists.freedesktop.org>
>>>> ---
>>>>  src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 3 +++
>>>>  1 file changed, 3 insertions(+)
>>>>
>>>> diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
>>>> b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
>>>> index ead0c35..0079a08 100644
>>>> --- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
>>>> +++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
>>>> @@ -719,6 +719,9 @@ miptree_create(struct brw_context *brw,
>>>>           ISL_SURF_USAGE_DEPTH_BIT | ISL_SURF_USAGE_TEXTURE_BIT,
>>>>           BO_ALLOC_BUSY, 0, NULL);
>>>>
>>>> +      if (mt == NULL)
>>>> +         return NULL;
>>>> +
>>>>        if (needs_separate_stencil(brw, mt, format) &&
>>>>            !make_separate_stencil_surface(brw, mt)) {
>>>>           intel_miptree_release(&mt);
>>>> -- 
>>>> 2.9.5
>>>>
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