Re: [PATCH] drm/i915/selftest: Fix dma_buf_vmap error handling

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Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:

> On Wed, May 17, 2017 at 03:41:49PM +0300, Mika Kuoppala wrote:
>> The dma_buf_vmap in itself warns on error and then downgrades
>> the return value from error ptr to NULL. Don't try to decode error
>> value from the return in our test.
>> 
>
> Actually dma_buf_vmap shouldn't be WARNing here, so go fix that
> instead.

Regarless of warn, we have mixed use of null and errptr checks
in the test. So eventually it might be best to return errptr
from dma_buf_vmap along of fixing the WARN.

But as discussed in irc, this might not bring much value.
-Mika
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