drm/xe/mmio: grab mem_access in xe_mmio_ioctl

Any kind of device memory access should first ensure the device is not
suspended, mmio included.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/xe_mmio.c

@@ -483,6 +483,7 @@ int xe_mmio_ioctl(struct drm_device *dev, void *data,
 	 */
 	reg = XE_REG(args->addr);
 
+	xe_device_mem_access_get(xe);
 	xe_force_wake_get(gt_to_fw(gt), XE_FORCEWAKE_ALL);
 
 	if (args->flags & DRM_XE_MMIO_WRITE) {
@@ -526,6 +527,7 @@ int xe_mmio_ioctl(struct drm_device *dev, void *data,
 
 exit:
 	xe_force_wake_put(gt_to_fw(gt), XE_FORCEWAKE_ALL);
+	xe_device_mem_access_put(xe);
 
 	return ret;
 }