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ext4: fix trimming of a single group

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commit ca6e909f9bebe709bc65a3ee605ce32969db0452 upstream.

When ext4_trim_fs() is called to trim a part of a single group, the
logic will wrongly set last block of the interval to 'len' instead
of 'first_block + len'. Thus a shorter interval is possibly trimmed.
Fix it.

CC: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jan Kara 2011-01-10 12:30:39 -05:00 committed by Greg Kroah-Hartman
parent 3d8874cb34
commit 3d597eb5d4
1 changed files with 1 additions and 1 deletions
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2
fs/ext4/mballoc.c
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@ -4851,7 +4851,7 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range)
if (len >= EXT4_BLOCKS_PER_GROUP(sb))
len -= (EXT4_BLOCKS_PER_GROUP(sb) - first_block);
else
last_block = len;
last_block = first_block + len;
if (e4b.bd_info->bb_free >= minlen) {
cnt = ext4_trim_all_free(sb, &e4b, first_block,