199 	if (q->read_buf) {  in videobuf_queue_is_busy()
797 	q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_zerocopy()
798 	if (NULL == q->read_buf)  in videobuf_read_zerocopy()
801 	q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_zerocopy()
802 	q->read_buf->baddr  = (unsigned long)data;  in videobuf_read_zerocopy()
803 	q->read_buf->bsize  = count;  in videobuf_read_zerocopy()
806 	retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_zerocopy()
812 	q->ops->buf_queue(q, q->read_buf);  in videobuf_read_zerocopy()
814 	retval = videobuf_waiton(q, q->read_buf, 0, 0);  in videobuf_read_zerocopy()
816 		CALL(q, sync, q, q->read_buf);  in videobuf_read_zerocopy()
817 		if (VIDEOBUF_ERROR == q->read_buf->state)  in videobuf_read_zerocopy()
820 			retval = q->read_buf->size;  in videobuf_read_zerocopy()
825 	q->ops->buf_release(q, q->read_buf);  in videobuf_read_zerocopy()
826 	kfree(q->read_buf);  in videobuf_read_zerocopy()
827 	q->read_buf = NULL;  in videobuf_read_zerocopy()
889 	if (NULL == q->read_buf  &&  in videobuf_read_one()
899 	if (NULL == q->read_buf) {  in videobuf_read_one()
902 		q->read_buf = videobuf_alloc_vb(q);  in videobuf_read_one()
904 		dprintk(1, "video alloc=0x%p\n", q->read_buf);  in videobuf_read_one()
905 		if (NULL == q->read_buf)  in videobuf_read_one()
907 		q->read_buf->memory = V4L2_MEMORY_USERPTR;  in videobuf_read_one()
908 		q->read_buf->bsize = count; /* preferred size */  in videobuf_read_one()
910 		retval = q->ops->buf_prepare(q, q->read_buf, field);  in videobuf_read_one()
913 			kfree(q->read_buf);  in videobuf_read_one()
914 			q->read_buf = NULL;  in videobuf_read_one()
919 		q->ops->buf_queue(q, q->read_buf);  in videobuf_read_one()
926 	retval = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_one()
930 	CALL(q, sync, q, q->read_buf);  in videobuf_read_one()
932 	if (VIDEOBUF_ERROR == q->read_buf->state) {  in videobuf_read_one()
934 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
935 		kfree(q->read_buf);  in videobuf_read_one()
936 		q->read_buf = NULL;  in videobuf_read_one()
942 	retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking);  in videobuf_read_one()
947 	if (q->read_off == q->read_buf->size) {  in videobuf_read_one()
949 		q->ops->buf_release(q, q->read_buf);  in videobuf_read_one()
950 		kfree(q->read_buf);  in videobuf_read_one()
951 		q->read_buf = NULL;  in videobuf_read_one()
1009 	q->read_buf = NULL;  in __videobuf_read_stop()
1069 		if (NULL == q->read_buf) {  in videobuf_read_stream()
1070 			q->read_buf = list_entry(q->stream.next,  in videobuf_read_stream()
1073 			list_del(&q->read_buf->stream);  in videobuf_read_stream()
1076 		rc = videobuf_waiton(q, q->read_buf, nonblocking, 1);  in videobuf_read_stream()
1083 		if (q->read_buf->state == VIDEOBUF_DONE) {  in videobuf_read_stream()
1084 			rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count,  in videobuf_read_stream()
1095 			q->read_off = q->read_buf->size;  in videobuf_read_stream()
1101 		if (q->read_off == q->read_buf->size) {  in videobuf_read_stream()
1102 			list_add_tail(&q->read_buf->stream,  in videobuf_read_stream()
1105 			q->ops->buf_queue(q, q->read_buf);  in videobuf_read_stream()
1107 			q->read_buf = NULL;  in videobuf_read_stream()
1137 		} else if (NULL == q->read_buf) {  in videobuf_poll_stream()
1138 			q->read_buf = list_entry(q->stream.next,  in videobuf_poll_stream()
1141 			list_del(&q->read_buf->stream);  in videobuf_poll_stream()
1144 		buf = q->read_buf;  in videobuf_poll_stream()