[Intel-gfx] [PATCH][next] drm/i915/selftest: fix an error return path where err is not being set

[Chris Wilson]

Quoting Colin King (2020-07-13 15:25:51)
> From: Colin Ian King <colin.king at canonical.com>
> 
> There is an error condition where err is not being set and an uninitialized
> garbage value in err is being returned.  Fix this by assigning err to an
> appropriate error return value before taking the error exit path.
> 
> Addresses-Coverity: ("Uninitialized scalar value")
> Fixes: ed2690a9ca89 ("drm/i915/selftest: Check that GPR are restored across noa_wait")
> Signed-off-by: Colin Ian King <colin.king at canonical.com>

Thanks, pushed.
-Chris