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| author |   Logan Gunthorpe <logang@deltatee.com> | 2022-09-08 10:15:15 -0600 |
|---|---|---|
| committer |   Song Liu <song@kernel.org> | 2022-09-22 00:05:04 -0700 |
| commit | 3bfc3bcd787c48aa31e4fde4a6dfcef4cd7ee2c2 (patch) | |
| tree | 3cd0f9504dd11972a378238e770f4e158d3ec624 /drivers/md | |
| parent | md/raid5: Remove unnecessary bio_put() in raid5_read_one_chunk() (diff) | |
| download | linux-dev-3bfc3bcd787c48aa31e4fde4a6dfcef4cd7ee2c2.tar.xz linux-dev-3bfc3bcd787c48aa31e4fde4a6dfcef4cd7ee2c2.zip | |
md: Remove extra mddev_get() in md_seq_start()
A regression is seen where mddev devices stay permanently after they
are stopped due to an elevated reference count.
This was tracked down to an extra mddev_get() in md_seq_start().
It only happened rarely because most of the time the md_seq_start()
is called with a zero offset. The path with an extra mddev_get() only
happens when it starts with a non-zero offset.
The commit noted below changed an mddev_get() to check its success
but inadvertently left the original call in. Remove the extra call.
Fixes: 12a6caf27324 ("md: only delete entries from all_mddevs when the disk is freed")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Guoqing Jiang <Guoqing.jiang@linux.dev>
Signed-off-by: Song Liu <song@kernel.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/md.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index afaf36b2f6ab..9dc0175280b4 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -8154,7 +8154,6 @@ static void *md_seq_start(struct seq_file *seq, loff_t *pos) list_for_each(tmp,&all_mddevs) if (!l--) { mddev = list_entry(tmp, struct mddev, all_mddevs); - mddev_get(mddev); if (!mddev_get(mddev)) continue; spin_unlock(&all_mddevs_lock); |