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authorTheodore Ts'o <tytso@mit.edu>2008-10-06 21:35:40 -0400
committerTheodore Ts'o <tytso@mit.edu>2008-10-06 21:35:40 -0400
commit914258bf2cb22bf4336a1b1d90c551b4b11ca5aa (patch)
tree66a3068b53059154b4584166c4b2ce90ae833b42 /fs/ext4/super.c
parent730c213c79a638137b47a90624e4bac252f07ae7 (diff)
downloadlinux-914258bf2cb22bf4336a1b1d90c551b4b11ca5aa.tar.bz2
ext4/jbd2: Avoid WARN() messages when failing to write to the superblock
This fixes some very common warnings reported by kerneloops.org Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/super.c')
-rw-r--r--fs/ext4/super.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8175318abd84..fb5766e2bffe 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2810,13 +2810,34 @@ static void ext4_commit_super(struct super_block *sb,
if (!sbh)
return;
+ 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.
+ */
+ printk(KERN_ERR "ext4: previous I/O error to "
+ "superblock detected for %s.\n", sb->s_id);
+ clear_buffer_write_io_error(sbh);
+ set_buffer_uptodate(sbh);
+ }
es->s_wtime = cpu_to_le32(get_seconds());
ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb));
es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb));
BUFFER_TRACE(sbh, "marking dirty");
mark_buffer_dirty(sbh);
- if (sync)
+ if (sync) {
sync_dirty_buffer(sbh);
+ if (buffer_write_io_error(sbh)) {
+ printk(KERN_ERR "ext4: I/O error while writing "
+ "superblock for %s.\n", sb->s_id);
+ clear_buffer_write_io_error(sbh);
+ set_buffer_uptodate(sbh);
+ }
+ }
}