[PATCH 4/4] drm/i915/guc: Inject probe errors for CT send

[Matthew Brost]

On Mon, Oct 11, 2021 at 08:51:06PM +0530, Thanneeru Srinivasulu wrote:
> Inject probe errors -ENXIO, -EBUSY for CT send.
> 
> Signed-off-by: Thanneeru Srinivasulu <thanneeru.srinivasulu at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> index 83764db0fd6d..8ffef3abd3da 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> @@ -765,6 +765,14 @@ int intel_guc_ct_send(struct intel_guc_ct *ct, const u32 *action, u32 len,
>  	u32 status = ~0; /* undefined */
>  	int ret;
>  
> +	ret = i915_inject_probe_error(ct_to_i915(ct), -ENXIO);
> +	if (ret)
> +		return ret;
> +

I don't see where -ENXIO is returned during an error that we handle
unless I am missing something. If we don't return -ENXIO anywhere else I
don't think we need to inject this error.

Matt 

> +	ret = i915_inject_probe_error(ct_to_i915(ct), -EBUSY);
> +	if (ret)
> +		return ret;
> +
>  	if (unlikely(!ct->enabled)) {
>  		struct intel_guc *guc = ct_to_guc(ct);
>  		struct intel_uc *uc = container_of(guc, struct intel_uc, guc);
> -- 
> 2.25.1
>