s390/dasd: fix double module refcount decrement

mainline inclusion
from mainline-v6.9-rc1
commit c3116e62ddeff79cae342147753ce596f01fcf06
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9L9NF
CVE: CVE-2024-27054

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c3116e62ddeff79cae342147753ce596f01fcf06



--------------------------------

Once the discipline is associated with the device, deleting the device
takes care of decrementing the module's refcount.  Doing it manually on
this error path causes refcount to artificially decrease on each error
while it should just stay the same.

Fixes: c020d722 ("s390/dasd: fix panic during offline processing")
Signed-off-by: Miroslav Franc <mfranc@suse.cz>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20240209124522.3697827-3-sth@linux.ibm.com


Signed-off-by: Jens Axboe <axboe@kernel.dk>
Conflicts:
	drivers/s390/block/dasd.c
[fix context conflicts]
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>