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| author | Artur Paszkiewicz <artur.paszkiewicz@intel.com> | 2017-05-08 11:56:55 +0200 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-05-08 19:32:59 +0200 |
| commit | 2214c260c72b0bd94e6c1c19bf451686212025d3 (patch) | |
| tree | 829a3494857d6bd61c38171a39e2e207de585e38 /drivers/md/raid1.c | |
| parent | md/raid5: make use of spin_lock_irq over local_irq_disable + spin_lock (diff) | |
| download | linux-2214c260c72b0bd94e6c1c19bf451686212025d3.tar.xz linux-2214c260c72b0bd94e6c1c19bf451686212025d3.zip | |
md: don't return -EAGAIN in md_allow_write for external metadata arrays
This essentially reverts commit b5470dc5fc18 ("md: resolve external
metadata handling deadlock in md_allow_write") with some adjustments.
Since commit 6791875e2e53 ("md: make reconfig_mutex optional for writes
to md sysfs files.") changing array_state to 'active' does not use
mddev_lock() and will not cause a deadlock with md_allow_write(). This
revert simplifies userspace tools that write to sysfs attributes like
"stripe_cache_size" or "consistency_policy" because it removes the need
for special handling for external metadata arrays, checking for EAGAIN
and retrying the write.
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 7ed59351fe97..7c1f73398800 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -3197,7 +3197,7 @@ static int raid1_reshape(struct mddev *mddev) struct r1conf *conf = mddev->private; int cnt, raid_disks; unsigned long flags; - int d, d2, err; + int d, d2; /* Cannot change chunk_size, layout, or level */ if (mddev->chunk_sectors != mddev->new_chunk_sectors || @@ -3209,11 +3209,8 @@ static int raid1_reshape(struct mddev *mddev) return -EINVAL; } - if (!mddev_is_clustered(mddev)) { - err = md_allow_write(mddev); - if (err) - return err; - } + if (!mddev_is_clustered(mddev)) + md_allow_write(mddev); raid_disks = mddev->raid_disks + mddev->delta_disks; |