198 	if (q->read_buf) {  in videobuf_queue_is_busy()
796 	q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_zerocopy()
797 	if (NULL == q->read_buf)  in videobuf_read_zerocopy()
800 	q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_zerocopy()
801 	q->read_buf->baddr  = (unsigned long)data;  in videobuf_read_zerocopy()
802 	q->read_buf->bsize  = count;  in videobuf_read_zerocopy()
805 	retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_zerocopy()
811 	q->ops->buf_queue(q, q->read_buf);  in videobuf_read_zerocopy()
813 	retval = videobuf_waiton(q, q->read_buf, 0, 0);  in videobuf_read_zerocopy()
815 		CALL(q, sync, q, q->read_buf);  in videobuf_read_zerocopy()
816 		if (VIDEOBUF_ERROR == q->read_buf->state)  in videobuf_read_zerocopy()
819 			retval = q->read_buf->size;  in videobuf_read_zerocopy()
824 	q->ops->buf_release(q, q->read_buf);  in videobuf_read_zerocopy()
825 	kfree(q->read_buf);  in videobuf_read_zerocopy()
826 	q->read_buf = NULL;  in videobuf_read_zerocopy()
888 	if (NULL == q->read_buf  &&  in videobuf_read_one()
898 	if (NULL == q->read_buf) {  in videobuf_read_one()
901 		q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_one()
903 		dprintk(1, "video alloc=0x%p\n", q->read_buf);  in videobuf_read_one()
904 		if (NULL == q->read_buf)  in videobuf_read_one()
906 		q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_one()
907 		q->read_buf->bsize = count; /* preferred size */  in videobuf_read_one()
909 		retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_one()
912 			kfree(q->read_buf);  in videobuf_read_one()
913 			q->read_buf = NULL;  in videobuf_read_one()
918 		q->ops->buf_queue(q, q->read_buf);  in videobuf_read_one()
925 	retval = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_one()
929 	CALL(q, sync, q, q->read_buf);  in videobuf_read_one()
931 	if (VIDEOBUF_ERROR == q->read_buf->state) {  in videobuf_read_one()
933 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
934 		kfree(q->read_buf);  in videobuf_read_one()
935 		q->read_buf = NULL;  in videobuf_read_one()
941 	retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking);  in videobuf_read_one()
946 	if (q->read_off == q->read_buf->size) {  in videobuf_read_one()
948 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
949 		kfree(q->read_buf);  in videobuf_read_one()
950 		q->read_buf = NULL;  in videobuf_read_one()
1008 	q->read_buf = NULL;  in __videobuf_read_stop()
1068 		if (NULL == q->read_buf) {  in videobuf_read_stream()
1069 			q->read_buf = list_entry(q->stream.next,  in videobuf_read_stream()
1072 			list_del(&q->read_buf->stream);  in videobuf_read_stream()
1075 		rc = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_stream()
1082 		if (q->read_buf->state == VIDEOBUF_DONE) {  in videobuf_read_stream()
1083 			rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count,  in videobuf_read_stream()
1094 			q->read_off = q->read_buf->size;  in videobuf_read_stream()
1100 		if (q->read_off == q->read_buf->size) {  in videobuf_read_stream()
1101 			list_add_tail(&q->read_buf->stream,  in videobuf_read_stream()
1104 			q->ops->buf_queue(q, q->read_buf);  in videobuf_read_stream()
1106 			q->read_buf = NULL;  in videobuf_read_stream()
1136 		} else if (NULL == q->read_buf) {  in videobuf_poll_stream()
1137 			q->read_buf = list_entry(q->stream.next,  in videobuf_poll_stream()
1140 			list_del(&q->read_buf->stream);  in videobuf_poll_stream()
1143 		buf = q->read_buf;  in videobuf_poll_stream()