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Diffstat (limited to 'block/blk-map.c')
-rw-r--r--block/blk-map.c27
1 files changed, 14 insertions, 13 deletions
diff --git a/block/blk-map.c b/block/blk-map.c
index 09f7fd0bcb7..c07d9c8317f 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -19,7 +19,6 @@ int blk_rq_append_bio(struct request_queue *q, struct request *rq,
rq->biotail->bi_next = bio;
rq->biotail = bio;
- rq->raw_data_len += bio->bi_size;
rq->data_len += bio->bi_size;
}
return 0;
@@ -44,6 +43,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
void __user *ubuf, unsigned int len)
{
unsigned long uaddr;
+ unsigned int alignment;
struct bio *bio, *orig_bio;
int reading, ret;
@@ -54,8 +54,8 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
* direct dma. else, set up kernel bounce buffers
*/
uaddr = (unsigned long) ubuf;
- if (!(uaddr & queue_dma_alignment(q)) &&
- !(len & queue_dma_alignment(q)))
+ alignment = queue_dma_alignment(q) | q->dma_pad_mask;
+ if (!(uaddr & alignment) && !(len & alignment))
bio = bio_map_user(q, NULL, uaddr, len, reading);
else
bio = bio_copy_user(q, uaddr, len, reading);
@@ -142,20 +142,22 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq,
/*
* __blk_rq_map_user() copies the buffers if starting address
- * or length isn't aligned. 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.
+ * 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 & queue_dma_alignment(q)) {
- unsigned int pad_len = (queue_dma_alignment(q) & ~len) + 1;
- struct bio *bio = rq->biotail;
+ if (len & q->dma_pad_mask) {
+ unsigned int pad_len = (q->dma_pad_mask & ~len) + 1;
+ struct bio *tail = rq->biotail;
- bio->bi_io_vec[bio->bi_vcnt - 1].bv_len += pad_len;
- bio->bi_size += pad_len;
- rq->data_len += pad_len;
+ tail->bi_io_vec[tail->bi_vcnt - 1].bv_len += pad_len;
+ tail->bi_size += pad_len;
+
+ rq->extra_len += pad_len;
}
rq->buffer = rq->data = NULL;
@@ -215,7 +217,6 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
rq->buffer = rq->data = NULL;
return 0;
}
-EXPORT_SYMBOL(blk_rq_map_user_iov);
/**
* blk_rq_unmap_user - unmap a request with user data