[PATCH v6] drm/xe: Add a null pointer check

[Karthik Poosa]

Add a missing null pointer check.

v2: Release resources before returning error. (Riana)

v3: Update commit message. (Badal)

v4: Change drm_err to XE_WARN_ON. (Anshuman)

v5: Fix XE_WARN_ON check. (Riana)

v6: Update commit message. (Jani)

Fixes: 09d88e3beb64 ("drm/xe/pm: Init pcode and restore vram on power lost")
Signed-off-by: Karthik Poosa <karthik.poosa at intel.com>
Reviewed-by: Riana Tauro <riana.tauro at intel.com>
---
 drivers/gpu/drm/xe/xe_pm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
index cc650a92c2fc..f6837bd6f9a3 100644
--- a/drivers/gpu/drm/xe/xe_pm.c
+++ b/drivers/gpu/drm/xe/xe_pm.c
@@ -383,6 +383,11 @@ int xe_pm_runtime_resume(struct xe_device *xe)
 	 * really lost power. Detecting primary Gt power is sufficient.
 	 */
 	gt = xe_device_get_gt(xe, 0);
+	if (XE_WARN_ON(!gt)) {
+		err = -ENXIO;
+		goto out;
+	}
+
 	xe->d3cold.power_lost = xe_guc_in_reset(&gt->uc.guc);
 
 	if (xe->d3cold.allowed && xe->d3cold.power_lost) {
-- 
2.25.1