V4L/DVB (7507): saa7134: add analog support for Avermedia A700 cards

[linux-2.6] / block / blk-map.c

diff --git a/block/blk-map.c b/block/blk-map.c
index ab43533ba641be51a8ed02129054d4d8530d684f..3c942bd6422a2ba639597ace2ad9f3768ccf1456 100644 (file)
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -141,25 +141,8 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq,
                ubuf += ret;
        }
 
-       /*
-        * __blk_rq_map_user() copies the buffers if starting address
-        * or length isn't aligned to dma_pad_mask.  As the copied
-        * buffer is always page aligned, we know that there's enough
-        * room for padding.  Extend the last bio and update
-        * rq->data_len accordingly.
-        *
-        * On unmap, bio_uncopy_user() will use unmodified
-        * bio_map_data pointed to by bio->bi_private.
-        */
-       if (len & q->dma_pad_mask) {
-               unsigned int pad_len = (q->dma_pad_mask & ~len) + 1;
-               struct bio *tail = rq->biotail;
-
-               tail->bi_io_vec[tail->bi_vcnt - 1].bv_len += pad_len;
-               tail->bi_size += pad_len;
-
-               rq->extra_len += pad_len;
-       }
+       if (!bio_flagged(bio, BIO_USER_MAPPED))
+               rq->cmd_flags |= REQ_COPY_USER;
 
        rq->buffer = rq->data = NULL;
        return 0;
@@ -224,6 +207,9 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
                return -EINVAL;
        }
 
+       if (!bio_flagged(bio, BIO_USER_MAPPED))
+               rq->cmd_flags |= REQ_COPY_USER;
+
        bio_get(bio);
        blk_rq_bio_prep(q, rq, bio);
        rq->buffer = rq->data = NULL;