[Intel-gfx] [PATCH v2 3/6] drm/i915 Implement LMEM backup and restore for suspend / resume

[Thomas Hellström]

Hi, Matt,

Thanks for reviewing.

On 9/7/21 7:37 PM, Matthew Auld wrote:
>
>> +    i915_gem_ww_unlock_single(backup);
>> +    i915_gem_object_put(backup);
>
> I assume we need to set ttm.backup = NULL somewhere here on the 
> failure path, or don't drop the ref? Or at least it looks like 
> potential uaf later?

Yes, I think on failure, we just don't drop the ref here in case 
something at some point decides to retry.

I'll fix up this and other comments.

/Thomas


>
>> +
>> +    return err;
>> +}
>> +