[PATCH] drm/xe: Restore EIO errno return when GuC PC start fails

[Rodrigo Vivi]

On Mon, Mar 31, 2025 at 09:59:47AM -0500, Lucas De Marchi wrote:
> On Fri, Mar 28, 2025 at 02:17:52PM -0400, Rodrigo Vivi wrote:
> > Commit b4b05e53b550 ("drm/xe/guc_pc: Retry and wait longer for GuC PC
> > start") from Mar 7, 2025 (linux-next), leads to the following Smatch
> 
> 	^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> these are not needed as the commit referenced is simply in our
> drm-xe-next branch (and if it wasn't, then this fix would probably not
> go through drm-xe).

doh! copy and paste without paying attention.

Removed this date/branch part while pushing, thank you!

> 
> > static checker warning:
> > 
> >        drivers/gpu/drm/xe/xe_guc_pc.c:1073 xe_guc_pc_start()
> >        warn: missing error code here? '_dev_err()' failed. 'ret' = '0'
> > 
> > Fixes: b4b05e53b550 ("drm/xe/guc_pc: Retry and wait longer for GuC PC start")
> > Reported-by: Dan Carpenter <dan.carpenter at linaro.org>
> > Closes: https://lore.kernel.org/intel-xe/1454a5f1-ee18-4df1-a6b2-a4a3dddcd1cb@stanley.mountain/
> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> 
> 
> Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>
> 
> Lucas De Marchi
> 
> > ---
> > drivers/gpu/drm/xe/xe_guc_pc.c | 1 +
> > 1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/gpu/drm/xe/xe_guc_pc.c b/drivers/gpu/drm/xe/xe_guc_pc.c
> > index 85215313976c..43b1192ba61c 100644
> > --- a/drivers/gpu/drm/xe/xe_guc_pc.c
> > +++ b/drivers/gpu/drm/xe/xe_guc_pc.c
> > @@ -1070,6 +1070,7 @@ int xe_guc_pc_start(struct xe_guc_pc *pc)
> > 		if (wait_for_pc_state(pc, SLPC_GLOBAL_STATE_RUNNING,
> > 				      SLPC_RESET_EXTENDED_TIMEOUT_MS)) {
> > 			xe_gt_err(gt, "GuC PC Start failed: Dynamic GT frequency control and GT sleep states are now disabled.\n");
> > +			ret = -EIO;
> > 			goto out;
> > 		}
> > 
> > -- 
> > 2.49.0
> >