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>

diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c
index 60bac65c8b9d7567f7c6d5eb02f955e28b30c261..e008e3c1bf680b4645692209ebeb03f2faa40ab2 100644 (file)
--- a/drivers/gpu/drm/xe/xe_gt.c
+++ b/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]);