[Intel-gfx] [PATCH 3/4] drm/i915/guc: Inject probe errors for MMIO send

[Matthew Brost]

On Mon, Oct 11, 2021 at 08:51:05PM +0530, Thanneeru Srinivasulu wrote:
> Injecting probe errors -ENXIO for MMIO send.
> 
> Signed-off-by: Thanneeru Srinivasulu <thanneeru.srinivasulu at intel.com>

Reviewed-by: Matthew Brost <matthew.brost at intel.com>

> ---
>  drivers/gpu/drm/i915/gt/uc/intel_guc.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> index 8f8182bf7c11..490d66712afc 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> @@ -403,6 +403,10 @@ int intel_guc_send_mmio(struct intel_guc *guc, const u32 *request, u32 len,
>  	int i;
>  	int ret;
>  
> +	ret = i915_inject_probe_error(i915, -ENXIO);
> +	if (ret)
> +		return ret;
> +
>  	GEM_BUG_ON(!len);
>  	GEM_BUG_ON(len > guc->send_regs.count);
>  
> -- 
> 2.25.1
>