md: revert the recent addition of a call to the BLKRRPART ioctl.

It turns out that it is only safe to call blkdev_ioctl when the device
is actually open (as ->bd_disk is set to NULL on last close).  And it
is quite possible for do_md_stop to be called when the device is not
open.  So discard the call to blkdev_ioctl(BLKRRPART) which was
added in
   commit 934d9c23b4c7e31840a895ba4b7e88d6413c81f3

It is just as easy to call this ioctl from userspace when needed (on
mdadm -S) so leave it out of the kernel

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 0 insertions, 6 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9abf6ed16535..1b1d32694f6f 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3884,7 +3884,6 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
         if (mode == 0) {
                 mdk_rdev_t *rdev;
                 struct list_head *tmp;
-                struct block_device *bdev;
 
                 printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
 
@@ -3941,11 +3940,6 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
                 mddev->degraded = 0;
                 mddev->barriers_work = 0;
                 mddev->safemode = 0;
-                bdev = bdget_disk(mddev->gendisk, 0);
-                if (bdev) {
-                        blkdev_ioctl(bdev, 0, BLKRRPART, 0);
-                        bdput(bdev);
-                }
                 kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
 
         } else if (mddev->pers)