From: Artem Bityutskiy <[email protected]>
Date: Thu, 23 Aug 2012 10:10:07 +0300
Subject: [PATCH] JFFS2: fix unmount regression
This patch fixes regression introduced by
"8bdc81c jffs2: get rid of jffs2_sync_super". We submit a delayed work in order
to make sure the write-buffer is synchronized at some point. But we do not
flush it when we unmount, which causes an oops when we unmount the file-system
and then the delayed work is executed.
This patch fixes the issue by adding a "cancel_delayed_work_sync()" infocation
in the '->sync_fs()' handler. This will make sure the delayed work is canceled
on sync, unmount and re-mount. And because VFS always callse 'sync_fs()' before
unmounting or remounting, this fixes the issue.
Reported-by: Ludovic Desroches <[email protected]>
Cc: [email protected] [3.5+]
Signed-off-by: Artem Bityutskiy <[email protected]>
---
Ludovic, would you please give this patch a test? Also attached.
fs/jffs2/super.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 61ea413..e385fa3 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -100,6 +100,9 @@ static int jffs2_sync_fs(struct super_block *sb, int wait)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
+ if (IS_ENABLED(CONFIG_JFFS2_FS_WRITEBUFFER))
+ cancel_delayed_work_sync(&c->wbuf_dwork);
+
mutex_lock(&c->alloc_sem);
jffs2_flush_wbuf_pad(c);
mutex_unlock(&c->alloc_sem);
--
1.7.10.4