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btrfs: use bi_size

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Instead of using bi_vcnt to calculate it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Christoph Hellwig 2016-11-25 09:07:50 +01:00 committed by David Sterba
parent 6cd7ce4935
commit 81381053d0
1 changed files with 2 additions and 5 deletions
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7
fs/btrfs/compression.c
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@ -562,7 +562,6 @@ next:
*
* bio->bi_iter.bi_sector points to the compressed extent on disk
* bio->bi_io_vec points to all of the inode pages
* bio->bi_vcnt is a count of pages
*
* After the compressed pages are read, we copy the bytes into the
* bio we were passed and then call the bio end_io calls
@ -574,7 +573,6 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
struct extent_map_tree *em_tree;
struct compressed_bio *cb;
struct btrfs_root *root = BTRFS_I(inode)->root;
unsigned long uncompressed_len = bio->bi_vcnt * PAGE_SIZE;
unsigned long compressed_len;
unsigned long nr_pages;
unsigned long pg_index;
@ -619,7 +617,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
free_extent_map(em);
em = NULL;
cb->len = uncompressed_len;
cb->len = bio->bi_iter.bi_size;
cb->compressed_len = compressed_len;
cb->compress_type = extent_compress_type(bio_flags);
cb->orig_bio = bio;
@ -647,8 +645,7 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
add_ra_bio_pages(inode, em_start + em_len, cb);
/* include any pages we added in add_ra-bio_pages */
uncompressed_len = bio->bi_vcnt * PAGE_SIZE;
cb->len = uncompressed_len;
cb->len = bio->bi_iter.bi_size;
comp_bio = compressed_bio_alloc(bdev, cur_disk_byte, GFP_NOFS);
if (!comp_bio)