[Cluster-devel] [PATCH v2] gfs2: Fix oversight in gfs2_ail1_flush

[Bob Peterson <rpeterso@redhat.com>]

Here is a revised version of the patch that is much simpler.

Hi,

Ordinarily, function gfs2_ail1_start_one issues a write request
for one item on the ail1 list, then returns -EBUSY. This makes the
caller, gfs2_ail1_flush, loop around and start another. However,
it was not clearing the -EBUSY return code each time through the loop.
So on rare occasions, like when the wbc runs out of nr_to_write, it
remained set to -EBUSY, which triggered an error and withdraw.

This patch sets the return code to 0 each time through the restart
loop so this won't happen anymore.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
---
 fs/gfs2/log.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index 82f356f57045..3a75843ae580 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -188,13 +188,14 @@ void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc)
 	struct list_head *head = &sdp->sd_ail1_list;
 	struct gfs2_trans *tr;
 	struct blk_plug plug;
-	int ret = 0;
+	int ret;
 	unsigned long flush_start = jiffies;
 
 	trace_gfs2_ail_flush(sdp, wbc, 1);
 	blk_start_plug(&plug);
 	spin_lock(&sdp->sd_ail_lock);
 restart:
+	ret = 0;
 	if (time_after(jiffies, flush_start + (HZ * 600))) {
 		dump_ail_list(sdp);
 		goto out;