21 /* Internal temporary helper struct, one for each v4l2_ext_control */
35  * Helper functions to copy control payload data from kernel space to
39 /* Helper function: copy the given control value back to the caller */
69 /* Helper function: copy the current control value back to the caller */
75 /* Helper function: copy the new control value back to the caller */
82 /* Helper function: copy the request value back to the caller */
89 /* Helper function: copy the initial control value back to the caller */
97 /* Helper function: copy the caller-provider value as the new control value */
313 		 * control in this helper array belonging to the same  in prepare_ext_ctrls()
334 	/* First zero the helper field in the master control references */  in prepare_ext_ctrls()
336 		helpers[i].mref->helper = NULL;  in prepare_ext_ctrls()
341 		 * If the mref->helper is set, then it points to an earlier  in prepare_ext_ctrls()
342 		 * helper that belongs to the same cluster.  in prepare_ext_ctrls()
344 		if (mref->helper) {  in prepare_ext_ctrls()
346 			 * Set the next field of mref->helper to the current  in prepare_ext_ctrls()
347 			 * index: this means that the earlier helper now  in prepare_ext_ctrls()
348 			 * points to the next helper in the same cluster.  in prepare_ext_ctrls()
350 			mref->helper->next = i;  in prepare_ext_ctrls()
352 			 * mref should be set only for the first helper in the  in prepare_ext_ctrls()
357 		/* Point the mref helper to the current helper struct. */  in prepare_ext_ctrls()
358 		mref->helper = h;  in prepare_ext_ctrls()
388 	struct v4l2_ctrl_helper helper[4];  in v4l2_g_ext_ctrls_common()  local
389 	struct v4l2_ctrl_helper *helpers = helper;  in v4l2_g_ext_ctrls_common()
406 	if (cs->count > ARRAY_SIZE(helper)) {  in v4l2_g_ext_ctrls_common()
407 		helpers = kvmalloc_array(cs->count, sizeof(helper[0]),  in v4l2_g_ext_ctrls_common()
480 	if (cs->count > ARRAY_SIZE(helper))  in v4l2_g_ext_ctrls_common()
560 	struct v4l2_ctrl_helper helper[4];  in try_set_ext_ctrls_common()  local
561 	struct v4l2_ctrl_helper *helpers = helper;  in try_set_ext_ctrls_common()
585 	if (cs->count > ARRAY_SIZE(helper)) {  in try_set_ext_ctrls_common()
586 		helpers = kvmalloc_array(cs->count, sizeof(helper[0]),  in try_set_ext_ctrls_common()
685 	if (cs->count > ARRAY_SIZE(helper))  in try_set_ext_ctrls_common()
733 /* Helper function to get a single control */
782 /* Helper function for VIDIOC_S_CTRL compatibility */
811 /* Helper function for VIDIOC_S_CTRL compatibility */
848  * Helper functions for drivers to get/set controls.
1304  * poll helper