drm/xe/gt: Synchronize GT reset with device unbind

When unbinding wait for any GT reset in progress to complete. Unbinding
will release the mmio mapping but mmio operations are performed during
GT reset causing Kernel panic.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patch.msgid.link/20251103123144.3231829-5-balasubramani.vivekanandan@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

Author: baluvivek

drivers/gpu/drm/xe/xe_gt.c

@@ -607,6 +607,13 @@ static void xe_gt_fini(void *arg)
 	struct xe_gt *gt = arg;
 	int i;
 
+	if (disable_work_sync(&gt->reset.worker))
+		/*
+		 * If gt_reset_worker was halted from executing, take care of
+		 * releasing the rpm reference here.
+		 */
+		xe_pm_runtime_put(gt_to_xe(gt));
+
 	for (i = 0; i < XE_ENGINE_CLASS_MAX; ++i)
 		xe_hw_fence_irq_finish(&gt->fence_irq[i]);