drm/xe/debugfs: Get a runtime_pm reference when setting wedged mode

This function is another entry point where it must be ensured that
the device resumes before operating on the GuC, so grab a runtime_pm
reference. This fixes inner xe_pm_runtime_get_noresume calls which
were previously failing.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503082450.268335-1-francois.dugast@intel.comSigned-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_debugfs.c

@@ -153,6 +153,7 @@ static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf,
 
 	xe->wedged.mode = wedged_mode;
 
+	xe_pm_runtime_get(xe);
 	for_each_gt(gt, xe, id) {
 		ret = xe_guc_ads_scheduler_policy_toggle_reset(&gt->uc.guc.ads);
 		if (ret) {
@@ -160,6 +161,7 @@ static ssize_t wedged_mode_set(struct file *f, const char __user *ubuf,
 			return -EIO;
 		}
 	}
+	xe_pm_runtime_put(xe);
 
 	return size;
 }