From: Miroslav Franc mfranc@suse.cz
[ Upstream commit 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: c020d722b110 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/s390/block/dasd.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index 0eac1ae4f4acb..0eea5afe9e9ea 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -3530,12 +3530,11 @@ int dasd_generic_set_online(struct ccw_device *cdev, dasd_delete_device(device); return -EINVAL; } + device->base_discipline = base_discipline; if (!try_module_get(discipline->owner)) { - module_put(base_discipline->owner); dasd_delete_device(device); return -EINVAL; } - device->base_discipline = base_discipline; device->discipline = discipline;
/* check_device will allocate block device if necessary */ @@ -3543,8 +3542,6 @@ int dasd_generic_set_online(struct ccw_device *cdev, if (rc) { dev_warn(dev, "Setting the DASD online with discipline %s failed with rc=%i\n", discipline->name, rc); - module_put(discipline->owner); - module_put(base_discipline->owner); dasd_delete_device(device); return rc; }