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| author | Stephen Hemminger <shemminger@vyatta.com> | 2009-11-16 16:04:49 -0800 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2009-12-10 15:02:53 +0100 |
| commit | 2074abfeb8ea2904aeeaecc45e0dfea3f83a22b2 (patch) | |
| tree | 86ed2d0aef6d17dc071d6c29e9736ed62a1f01d0 | |
| parent | 2314b07cb47ef7d7da5779977f8c3bf1b65748d2 (diff) | |
| download | linux-2074abfeb8ea2904aeeaecc45e0dfea3f83a22b2.tar.bz2 | |
ext2: clear uptodate flag on super block I/O error
This fixes a WARN backtrace in mark_buffer_dirty() that occurs during
unmount when a USB or floppy device is removed. I reported this a kernel
regression, but looks like it might have been there for longer
than that.
The super block update from a previous operation has marked the buffer
as in error, and the flag has to be cleared before doing the update.
(Similar code already exists in ext4).
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Jan Kara <jack@suse.cz>
| -rw-r--r-- | fs/ext2/super.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 0faf770fb776..1388802b7803 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1137,8 +1137,24 @@ static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es) static int ext2_sync_fs(struct super_block *sb, int wait) { struct ext2_super_block *es = EXT2_SB(sb)->s_es; + struct buffer_head *sbh = EXT2_SB(sb)->s_sbh; lock_kernel(); + if (buffer_write_io_error(sbh)) { + /* + * Oh, dear. A previous attempt to write the + * superblock failed. This could happen because the + * USB device was yanked out. Or it could happen to + * be a transient write error and maybe the block will + * be remapped. Nothing we can do but to retry the + * write and hope for the best. + */ + ext2_msg(sb, KERN_ERR, + "previous I/O error to superblock detected\n"); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } + if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) { ext2_debug("setting valid to 0\n"); es->s_state &= cpu_to_le16(~EXT2_VALID_FS); |