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md: extend disks_mutex coverage

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disks_mutex is intended to serialize md_alloc.  Extended it to also cover
the kobject_uevent call and getting the sysfs dirent to help reducing
error handling complexity.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2021-09-01 13:38:32 +02:00
committed by Jens Axboe
parent 51238e7fbd
commit 94f3cd7d83
1 changed files with 1 additions and 1 deletions
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2
drivers/md/md.c
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@@ -5725,12 +5725,12 @@ static int md_alloc(dev_t dev, char *name)
error = 0; error = 0;
} }
abort: abort:
mutex_unlock(&disks_mutex);
if (!error && mddev->kobj.sd) { if (!error && mddev->kobj.sd) {
kobject_uevent(&mddev->kobj, KOBJ_ADD); kobject_uevent(&mddev->kobj, KOBJ_ADD);
mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state"); mddev->sysfs_state = sysfs_get_dirent_safe(mddev->kobj.sd, "array_state");
mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level"); mddev->sysfs_level = sysfs_get_dirent_safe(mddev->kobj.sd, "level");
} }
mutex_unlock(&disks_mutex);
mddev_put(mddev); mddev_put(mddev);
return error; return error;
} }