md: factor do_md_run to separate accesses to ->gendisk
As part of relaxing the binding between an mddev and gendisk,
we separate do_md_run into two functions.
md_run does all the work internal to md
do_md_run calls md_run and makes and changes to gendisk
that are required.
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/md.c b/drivers/md/md.c
index f2b3001..e752332 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4297,11 +4297,10 @@
static int start_dirty_degraded;
-static int do_md_run(mddev_t * mddev)
+static int md_run(mddev_t *mddev)
{
int err;
mdk_rdev_t *rdev;
- struct gendisk *disk;
struct mdk_personality *pers;
if (list_empty(&mddev->disks))
@@ -4366,8 +4365,6 @@
sysfs_notify_dirent(rdev->sysfs_state);
}
- disk = mddev->gendisk;
-
spin_lock(&pers_lock);
pers = find_pers(mddev->level, mddev->clevel);
if (!pers || !try_module_get(pers->owner)) {
@@ -4495,21 +4492,32 @@
if (mddev->flags)
md_update_sb(mddev, 0);
- set_capacity(disk, mddev->array_sectors);
-
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
- revalidate_disk(mddev->gendisk);
md_new_event(mddev);
sysfs_notify_dirent(mddev->sysfs_state);
if (mddev->sysfs_action)
sysfs_notify_dirent(mddev->sysfs_action);
sysfs_notify(&mddev->kobj, NULL, "degraded");
- kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
return 0;
}
+static int do_md_run(mddev_t *mddev)
+{
+ int err;
+
+ err = md_run(mddev);
+ if (err)
+ goto out;
+
+ set_capacity(mddev->gendisk, mddev->array_sectors);
+ revalidate_disk(mddev->gendisk);
+ kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
+out:
+ return err;
+}
+
static int restart_array(mddev_t *mddev)
{
struct gendisk *disk = mddev->gendisk;