[PATCH v4 09/23] drm/xe: Skip L2 / TDF cache flushes if primary GT is disabled

[Matt Roper <matthew.d.roper@intel.com>]

If the primary GT is disabled via configfs, GT-side L2 and TD cache
flushes are unnecessary since nothing is using/filling these caches.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 drivers/gpu/drm/xe/xe_device.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_device.c b/drivers/gpu/drm/xe/xe_device.c
index 386940323630..d42d03b8ab3a 100644
--- a/drivers/gpu/drm/xe/xe_device.c
+++ b/drivers/gpu/drm/xe/xe_device.c
@@ -1062,6 +1062,8 @@ void xe_device_l2_flush(struct xe_device *xe)
 	unsigned int fw_ref;
 
 	gt = xe_root_mmio_gt(xe);
+	if (!gt)
+		return;
 
 	if (!XE_GT_WA(gt, 16023588340))
 		return;
@@ -1107,6 +1109,9 @@ void xe_device_td_flush(struct xe_device *xe)
 		return;
 
 	root_gt = xe_root_mmio_gt(xe);
+	if (!root_gt)
+		return;
+
 	if (XE_GT_WA(root_gt, 16023588340)) {
 		/* A transient flush is not sufficient: flush the L2 */
 		xe_device_l2_flush(xe);
-- 
2.51.0