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for-5.6-rc4-tag

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Merge tag 'for-5.6-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fix from David Sterba:
 "One fixup for DIO when in use with the new checksums, a missed case
  where the checksum size was still assuming u32"

* tag 'for-5.6-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: fix RAID direct I/O reads with alternate csums
This commit is contained in:
Linus Torvalds 2020-03-06 14:56:46 -06:00
commit 30fe0d07fd
1 changed files with 3 additions and 1 deletions
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4
fs/btrfs/inode.c
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@ -7783,6 +7783,7 @@ static inline blk_status_t btrfs_lookup_and_bind_dio_csum(struct inode *inode,
{
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
struct btrfs_io_bio *orig_io_bio = btrfs_io_bio(dip->orig_bio);
u16 csum_size;
blk_status_t ret;
/*
@ -7802,7 +7803,8 @@ static inline blk_status_t btrfs_lookup_and_bind_dio_csum(struct inode *inode,
file_offset -= dip->logical_offset;
file_offset >>= inode->i_sb->s_blocksize_bits;
io_bio->csum = (u8 *)(((u32 *)orig_io_bio->csum) + file_offset);
csum_size = btrfs_super_csum_size(btrfs_sb(inode->i_sb)->super_copy);
io_bio->csum = orig_io_bio->csum + csum_size * file_offset;
return 0;
}