drm/xe/guc: Ensure CT state transitions via STOP before DISABLED

The GuC CT state transition requires moving to the STOP state before
entering the DISABLED state. Update the driver teardown sequence to make
the proper state machine transitions.

Fixes: ee4b32220a6b ("drm/xe/guc: Add devm release action to safely tear down CT")
Cc: stable@vger.kernel.org
Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260310225039.1320161-6-zhanjun.dong@intel.com
(cherry picked from commit dace8cb0032f57ea67c87b3b92ad73c89dd2db44)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c
index d04589140b776f45fe63ab44ed38c83db79bbefd..c80082b4c876c731b4d5d4db2a5478e6f84cadff 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc_ct.c
+++ b/drivers/gpu/drm/xe/xe_guc_ct.c
@@ -345,6 +345,7 @@ static void guc_action_disable_ct(void *arg)
 {
        struct xe_guc_ct *ct = arg;
 
+       xe_guc_ct_stop(ct);
        guc_ct_change_state(ct, XE_GUC_CT_STATE_DISABLED);
 }