444 static int uvc_acquire_privileges(struct uvc_fh *handle)  in uvc_acquire_privileges()  argument
447 	if (handle->state == UVC_HANDLE_ACTIVE)  in uvc_acquire_privileges()
451 	if (atomic_inc_return(&handle->stream->active) != 1) {  in uvc_acquire_privileges()
452 		atomic_dec(&handle->stream->active);  in uvc_acquire_privileges()
456 	handle->state = UVC_HANDLE_ACTIVE;  in uvc_acquire_privileges()
460 static void uvc_dismiss_privileges(struct uvc_fh *handle)  in uvc_dismiss_privileges()  argument
462 	if (handle->state == UVC_HANDLE_ACTIVE)  in uvc_dismiss_privileges()
463 		atomic_dec(&handle->stream->active);  in uvc_dismiss_privileges()
465 	handle->state = UVC_HANDLE_PASSIVE;  in uvc_dismiss_privileges()
468 static int uvc_has_privileges(struct uvc_fh *handle)  in uvc_has_privileges()  argument
470 	return handle->state == UVC_HANDLE_ACTIVE;  in uvc_has_privileges()
480 	struct uvc_fh *handle;  in uvc_v4l2_open()  local
491 	handle = kzalloc(sizeof *handle, GFP_KERNEL);  in uvc_v4l2_open()
492 	if (handle == NULL) {  in uvc_v4l2_open()
503 			kfree(handle);  in uvc_v4l2_open()
511 	v4l2_fh_init(&handle->vfh, &stream->vdev);  in uvc_v4l2_open()
512 	v4l2_fh_add(&handle->vfh);  in uvc_v4l2_open()
513 	handle->chain = stream->chain;  in uvc_v4l2_open()
514 	handle->stream = stream;  in uvc_v4l2_open()
515 	handle->state = UVC_HANDLE_PASSIVE;  in uvc_v4l2_open()
516 	file->private_data = handle;  in uvc_v4l2_open()
523 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_release()  local
524 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_release()
529 	if (uvc_has_privileges(handle))  in uvc_v4l2_release()
533 	uvc_dismiss_privileges(handle);  in uvc_v4l2_release()
534 	v4l2_fh_del(&handle->vfh);  in uvc_v4l2_release()
535 	v4l2_fh_exit(&handle->vfh);  in uvc_v4l2_release()
536 	kfree(handle);  in uvc_v4l2_release()
552 	struct uvc_fh *handle = file->private_data;  in uvc_ioctl_querycap()  local
553 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_querycap()
554 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_querycap()
596 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_fmt_vid_cap()  local
597 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_fmt_vid_cap()
605 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_fmt_vid_out()  local
606 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_fmt_vid_out()
614 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_fmt_vid_cap()  local
615 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_fmt_vid_cap()
623 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_fmt_vid_out()  local
624 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_fmt_vid_out()
632 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_fmt_vid_cap()  local
633 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_s_fmt_vid_cap()
636 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_fmt_vid_cap()
646 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_fmt_vid_out()  local
647 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_s_fmt_vid_out()
650 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_fmt_vid_out()
660 	struct uvc_fh *handle = fh;  in uvc_ioctl_try_fmt_vid_cap()  local
661 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_try_fmt_vid_cap()
670 	struct uvc_fh *handle = fh;  in uvc_ioctl_try_fmt_vid_out()  local
671 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_try_fmt_vid_out()
680 	struct uvc_fh *handle = fh;  in uvc_ioctl_reqbufs()  local
681 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_reqbufs()
684 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_reqbufs()
695 		uvc_dismiss_privileges(handle);  in uvc_ioctl_reqbufs()
703 	struct uvc_fh *handle = fh;  in uvc_ioctl_querybuf()  local
704 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_querybuf()
706 	if (!uvc_has_privileges(handle))  in uvc_ioctl_querybuf()
714 	struct uvc_fh *handle = fh;  in uvc_ioctl_qbuf()  local
715 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_qbuf()
717 	if (!uvc_has_privileges(handle))  in uvc_ioctl_qbuf()
726 	struct uvc_fh *handle = fh;  in uvc_ioctl_expbuf()  local
727 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_expbuf()
729 	if (!uvc_has_privileges(handle))  in uvc_ioctl_expbuf()
737 	struct uvc_fh *handle = fh;  in uvc_ioctl_dqbuf()  local
738 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_dqbuf()
740 	if (!uvc_has_privileges(handle))  in uvc_ioctl_dqbuf()
750 	struct uvc_fh *handle = fh;  in uvc_ioctl_create_bufs()  local
751 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_create_bufs()
754 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_create_bufs()
764 	struct uvc_fh *handle = fh;  in uvc_ioctl_streamon()  local
765 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_streamon()
768 	if (!uvc_has_privileges(handle))  in uvc_ioctl_streamon()
781 	struct uvc_fh *handle = fh;  in uvc_ioctl_streamoff()  local
782 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_streamoff()
784 	if (!uvc_has_privileges(handle))  in uvc_ioctl_streamoff()
797 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_input()  local
798 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_enum_input()
837 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_input()  local
838 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_g_input()
860 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_input()  local
861 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_s_input()
865 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_input()
888 	struct uvc_fh *handle = fh;  in uvc_ioctl_queryctrl()  local
889 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_queryctrl()
897 	struct uvc_fh *handle = fh;  in uvc_ioctl_query_ext_ctrl()  local
898 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_query_ext_ctrl()
926 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_ctrl()  local
927 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_g_ctrl()
939 	uvc_ctrl_rollback(handle);  in uvc_ioctl_g_ctrl()
950 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_ctrl()  local
951 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_s_ctrl()
965 		uvc_ctrl_rollback(handle);  in uvc_ioctl_s_ctrl()
969 	ret = uvc_ctrl_commit(handle, &xctrl, 1);  in uvc_ioctl_s_ctrl()
980 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_ext_ctrls()  local
981 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_g_ext_ctrls()
993 			uvc_ctrl_rollback(handle);  in uvc_ioctl_g_ext_ctrls()
1001 	return uvc_ctrl_rollback(handle);  in uvc_ioctl_g_ext_ctrls()
1004 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,  in uvc_ioctl_s_try_ext_ctrls()  argument
1009 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_s_try_ext_ctrls()
1020 			uvc_ctrl_rollback(handle);  in uvc_ioctl_s_try_ext_ctrls()
1029 		return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);  in uvc_ioctl_s_try_ext_ctrls()
1031 		return uvc_ctrl_rollback(handle);  in uvc_ioctl_s_try_ext_ctrls()
1037 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_ext_ctrls()  local
1039 	return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);  in uvc_ioctl_s_ext_ctrls()
1045 	struct uvc_fh *handle = fh;  in uvc_ioctl_try_ext_ctrls()  local
1047 	return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);  in uvc_ioctl_try_ext_ctrls()
1053 	struct uvc_fh *handle = fh;  in uvc_ioctl_querymenu()  local
1054 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_querymenu()
1062 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_selection()  local
1063 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_selection()
1096 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_parm()  local
1097 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_parm()
1105 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_parm()  local
1106 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_s_parm()
1109 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_parm()
1119 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_framesizes()  local
1120 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_framesizes()
1148 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_frameintervals()  local
1149 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_frameintervals()
1220 	struct uvc_fh *handle = fh;  in uvc_ioctl_default()  local
1221 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_default()
1445 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_mmap()  local
1446 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_mmap()
1455 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_poll()  local
1456 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_poll()
1468 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_get_unmapped_area()  local
1469 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_get_unmapped_area()