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
494 	handle = kzalloc(sizeof *handle, GFP_KERNEL);  in uvc_v4l2_open()
495 	if (handle == NULL) {  in uvc_v4l2_open()
506 			kfree(handle);  in uvc_v4l2_open()
514 	v4l2_fh_init(&handle->vfh, &stream->vdev);  in uvc_v4l2_open()
515 	v4l2_fh_add(&handle->vfh);  in uvc_v4l2_open()
516 	handle->chain = stream->chain;  in uvc_v4l2_open()
517 	handle->stream = stream;  in uvc_v4l2_open()
518 	handle->state = UVC_HANDLE_PASSIVE;  in uvc_v4l2_open()
519 	file->private_data = handle;  in uvc_v4l2_open()
526 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_release()  local
527 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_release()
532 	if (uvc_has_privileges(handle))  in uvc_v4l2_release()
536 	uvc_dismiss_privileges(handle);  in uvc_v4l2_release()
537 	v4l2_fh_del(&handle->vfh);  in uvc_v4l2_release()
538 	v4l2_fh_exit(&handle->vfh);  in uvc_v4l2_release()
539 	kfree(handle);  in uvc_v4l2_release()
555 	struct uvc_fh *handle = file->private_data;  in uvc_ioctl_querycap()  local
556 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_querycap()
557 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_querycap()
599 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_fmt_vid_cap()  local
600 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_fmt_vid_cap()
608 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_fmt_vid_out()  local
609 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_fmt_vid_out()
617 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_fmt_vid_cap()  local
618 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_fmt_vid_cap()
626 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_fmt_vid_out()  local
627 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_fmt_vid_out()
635 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_fmt_vid_cap()  local
636 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_s_fmt_vid_cap()
639 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_fmt_vid_cap()
649 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_fmt_vid_out()  local
650 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_s_fmt_vid_out()
653 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_fmt_vid_out()
663 	struct uvc_fh *handle = fh;  in uvc_ioctl_try_fmt_vid_cap()  local
664 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_try_fmt_vid_cap()
673 	struct uvc_fh *handle = fh;  in uvc_ioctl_try_fmt_vid_out()  local
674 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_try_fmt_vid_out()
683 	struct uvc_fh *handle = fh;  in uvc_ioctl_reqbufs()  local
684 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_reqbufs()
687 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_reqbufs()
698 		uvc_dismiss_privileges(handle);  in uvc_ioctl_reqbufs()
706 	struct uvc_fh *handle = fh;  in uvc_ioctl_querybuf()  local
707 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_querybuf()
709 	if (!uvc_has_privileges(handle))  in uvc_ioctl_querybuf()
717 	struct uvc_fh *handle = fh;  in uvc_ioctl_qbuf()  local
718 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_qbuf()
720 	if (!uvc_has_privileges(handle))  in uvc_ioctl_qbuf()
728 	struct uvc_fh *handle = fh;  in uvc_ioctl_dqbuf()  local
729 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_dqbuf()
731 	if (!uvc_has_privileges(handle))  in uvc_ioctl_dqbuf()
741 	struct uvc_fh *handle = fh;  in uvc_ioctl_create_bufs()  local
742 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_create_bufs()
745 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_create_bufs()
755 	struct uvc_fh *handle = fh;  in uvc_ioctl_streamon()  local
756 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_streamon()
759 	if (!uvc_has_privileges(handle))  in uvc_ioctl_streamon()
772 	struct uvc_fh *handle = fh;  in uvc_ioctl_streamoff()  local
773 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_streamoff()
775 	if (!uvc_has_privileges(handle))  in uvc_ioctl_streamoff()
788 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_input()  local
789 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_enum_input()
828 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_input()  local
829 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_g_input()
851 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_input()  local
852 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_s_input()
856 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_input()
879 	struct uvc_fh *handle = fh;  in uvc_ioctl_queryctrl()  local
880 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_queryctrl()
888 	struct uvc_fh *handle = fh;  in uvc_ioctl_query_ext_ctrl()  local
889 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_query_ext_ctrl()
917 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_ctrl()  local
918 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_g_ctrl()
930 	uvc_ctrl_rollback(handle);  in uvc_ioctl_g_ctrl()
941 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_ctrl()  local
942 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_s_ctrl()
956 		uvc_ctrl_rollback(handle);  in uvc_ioctl_s_ctrl()
960 	ret = uvc_ctrl_commit(handle, &xctrl, 1);  in uvc_ioctl_s_ctrl()
971 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_ext_ctrls()  local
972 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_g_ext_ctrls()
984 			uvc_ctrl_rollback(handle);  in uvc_ioctl_g_ext_ctrls()
992 	return uvc_ctrl_rollback(handle);  in uvc_ioctl_g_ext_ctrls()
995 static int uvc_ioctl_s_try_ext_ctrls(struct uvc_fh *handle,  in uvc_ioctl_s_try_ext_ctrls()  argument
1000 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_s_try_ext_ctrls()
1011 			uvc_ctrl_rollback(handle);  in uvc_ioctl_s_try_ext_ctrls()
1020 		return uvc_ctrl_commit(handle, ctrls->controls, ctrls->count);  in uvc_ioctl_s_try_ext_ctrls()
1022 		return uvc_ctrl_rollback(handle);  in uvc_ioctl_s_try_ext_ctrls()
1028 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_ext_ctrls()  local
1030 	return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, true);  in uvc_ioctl_s_ext_ctrls()
1036 	struct uvc_fh *handle = fh;  in uvc_ioctl_try_ext_ctrls()  local
1038 	return uvc_ioctl_s_try_ext_ctrls(handle, ctrls, false);  in uvc_ioctl_try_ext_ctrls()
1044 	struct uvc_fh *handle = fh;  in uvc_ioctl_querymenu()  local
1045 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_querymenu()
1053 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_selection()  local
1054 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_selection()
1087 	struct uvc_fh *handle = fh;  in uvc_ioctl_g_parm()  local
1088 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_g_parm()
1096 	struct uvc_fh *handle = fh;  in uvc_ioctl_s_parm()  local
1097 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_s_parm()
1100 	ret = uvc_acquire_privileges(handle);  in uvc_ioctl_s_parm()
1110 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_framesizes()  local
1111 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_framesizes()
1139 	struct uvc_fh *handle = fh;  in uvc_ioctl_enum_frameintervals()  local
1140 	struct uvc_streaming *stream = handle->stream;  in uvc_ioctl_enum_frameintervals()
1211 	struct uvc_fh *handle = fh;  in uvc_ioctl_default()  local
1212 	struct uvc_video_chain *chain = handle->chain;  in uvc_ioctl_default()
1382 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_compat_ioctl32()  local
1395 		ret = uvc_ioctl_ctrl_map(handle->chain, &karg.xmap);  in uvc_v4l2_compat_ioctl32()
1408 		ret = uvc_xu_ctrl_query(handle->chain, &karg.xqry);  in uvc_v4l2_compat_ioctl32()
1433 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_mmap()  local
1434 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_mmap()
1443 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_poll()  local
1444 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_poll()
1456 	struct uvc_fh *handle = file->private_data;  in uvc_v4l2_get_unmapped_area()  local
1457 	struct uvc_streaming *stream = handle->stream;  in uvc_v4l2_get_unmapped_area()