On Thu, 2012-08-23 at 11:05 +0200, ludovic.desroches wrote:
>
> Tested-by: Ludovic Desroches <[email protected]>
Thanks, pushed to l2-mtd.git tree a bit modified patch. Will ping dwmw2
about merging it to Linus.
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]>
Tested-by: Ludovic Desroches <[email protected]>
---
fs/jffs2/super.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 61ea413..1224d6b 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -100,6 +100,10 @@ static int jffs2_sync_fs(struct super_block *sb, int wait)
{
struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
+#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
+ cancel_delayed_work_sync(&c->wbuf_dwork);
+#endif
+
mutex_lock(&c->alloc_sem);
jffs2_flush_wbuf_pad(c);
mutex_unlock(&c->alloc_sem);
--
1.7.10.4
--
Best Regards,
Artem Bityutskiy