[Intel-gfx] [PATCH] drm/i915: Don't show the blank process name for internal/simulated errors

[Mika Kuoppala]

Chris Wilson <chris at chris-wilson.co.uk> writes:

> For a simulated preemption reset, we don't populate the request and so
> do not fill in the guilty context name.
>
> [   79.991294] i915 0000:00:02.0: GPU HANG: ecode 9:1:e757fefe, in  [0]
>
> Just don't mention the empty string in the logs!
>
> Fixes: 742379c0c400 ("drm/i915: Start chopping up the GPU error capture")
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_gpu_error.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
> index 4c1836f0a991..594341e27a47 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -1681,7 +1681,7 @@ static const char *error_msg(struct i915_gpu_coredump *error)
>  			"GPU HANG: ecode %d:%x:%08x",
>  			INTEL_GEN(error->i915), engines,
>  			generate_ecode(first));
> -	if (first) {
> +	if (first && first->context.pid) {

The dmesg line included saved me the trouble of seeing how the context
is primed, so:

Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

>  		/* Just show the first executing process, more is confusing */
>  		len += scnprintf(error->error_msg + len,
>  				 sizeof(error->error_msg) - len,
> -- 
> 2.25.0