diff options
| author | Miroslav Franc <mfranc@suse.cz> | 2024-02-09 13:45:22 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-02-09 07:33:06 -0700 |
| commit | c3116e62ddeff79cae342147753ce596f01fcf06 (patch) | |
| tree | e8737fb92f84f17d39b7352bd890398602b6335c /drivers/s390/block | |
| parent | 1df0f512faa71f1e106f36529ceff52f48209e30 (diff) | |
| download | lwn-c3116e62ddeff79cae342147753ce596f01fcf06.tar.gz lwn-c3116e62ddeff79cae342147753ce596f01fcf06.zip | |
s390/dasd: fix double module refcount decrement
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>
Diffstat (limited to 'drivers/s390/block')
| -rw-r--r-- | drivers/s390/block/dasd.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index fdb6cb8d8abf..2f3adf5d8fee 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -3503,12 +3503,11 @@ 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 */ @@ -3516,8 +3515,6 @@ 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; } |