788 	struct usbvision_frame *frame;  in vidioc_querybuf()  local
800 	frame = &usbvision->frame[vb->index];  in vidioc_querybuf()
801 	if(frame->grabstate >= FrameState_Ready)  in vidioc_querybuf()
803 	if(frame->grabstate >= FrameState_Done)  in vidioc_querybuf()
805 	if(frame->grabstate == FrameState_Unused)  in vidioc_querybuf()
816 	vb->timestamp = usbvision->frame[vb->index].timestamp;  in vidioc_querybuf()
817 	vb->sequence = usbvision->frame[vb->index].sequence;  in vidioc_querybuf()
824 	struct usbvision_frame *frame;  in vidioc_qbuf()  local
835 	frame = &usbvision->frame[vb->index];  in vidioc_qbuf()
837 	if (frame->grabstate != FrameState_Unused) {  in vidioc_qbuf()
842 	frame->grabstate = FrameState_Ready;  in vidioc_qbuf()
843 	frame->scanstate = ScanState_Scanning;  in vidioc_qbuf()
844 	frame->scanlength = 0;	/* Accumulated in usbvision_parse_data() */  in vidioc_qbuf()
849 	frame->v4l2_format = usbvision->palette;  in vidioc_qbuf()
852 	list_add_tail(&usbvision->frame[vb->index].frame, &usbvision->inqueue);  in vidioc_qbuf()
880 		       struct usbvision_frame, frame);  in vidioc_dqbuf()
1023 	struct usbvision_frame *frame;  in usbvision_v4l2_read()  local
1051 		frame = &usbvision->frame[i];  in usbvision_v4l2_read()
1052 		if(frame->grabstate == FrameState_Unused) {  in usbvision_v4l2_read()
1054 			frame->grabstate = FrameState_Ready;  in usbvision_v4l2_read()
1055 			frame->scanstate = ScanState_Scanning;  in usbvision_v4l2_read()
1057 			frame->scanlength = 0;  in usbvision_v4l2_read()
1060 			frame->v4l2_format = usbvision->palette;  in usbvision_v4l2_read()
1063 			list_add_tail(&frame->frame, &usbvision->inqueue);  in usbvision_v4l2_read()
1082 	frame = list_entry(usbvision->outqueue.next,  in usbvision_v4l2_read()
1083 			   struct usbvision_frame, frame);  in usbvision_v4l2_read()
1088 	if (frame->grabstate == FrameState_Error) {  in usbvision_v4l2_read()
1089 		frame->bytes_read = 0;  in usbvision_v4l2_read()
1095 	       frame->index, frame->bytes_read, frame->scanlength);  in usbvision_v4l2_read()
1098 	if ((count + frame->bytes_read) > (unsigned long)frame->scanlength)  in usbvision_v4l2_read()
1099 		count = frame->scanlength - frame->bytes_read;  in usbvision_v4l2_read()
1101 	if (copy_to_user(buf, frame->data + frame->bytes_read, count)) {  in usbvision_v4l2_read()
1105 	frame->bytes_read += count;  in usbvision_v4l2_read()
1108 	       (unsigned long)count, frame->bytes_read);  in usbvision_v4l2_read()
1112 		frame->bytes_read = 0;  in usbvision_v4l2_read()
1115 		frame->grabstate = FrameState_Unused;  in usbvision_v4l2_read()
1160 	pos = usbvision->frame[i].data;  in usbvision_v4l2_mmap()