linux

iv/linux

History

Jan Höppner ccc45cb4e7 s390/dasd: Use correct lock while counting channel queue length

The lock around counting the channel queue length in the BIODASDINFO
ioctl was incorrectly changed to the dasd_block->queue_lock with commit
583d6535cb9d ("dasd: remove dead code"). This can lead to endless list
iterations and a subsequent crash.

The queue_lock is supposed to be used only for queue lists belonging to
dasd_block. For dasd_device related queue lists the ccwdev lock must be
used.

Fix the mentioned issues by correctly using the ccwdev lock instead of
the queue lock.

Fixes: 583d6535cb9d ("dasd: remove dead code")
Cc: stable@vger.kernel.org # v5.0+
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20230609153750.1258763-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

2023-06-09 11:35:52 -06:00

dasd_3990_erp.c

s390/dasd: sort out physical vs virtual pointers usage

2023-02-09 17:05:43 -07:00

dasd_alias.c

s390/dasd: sort out physical vs virtual pointers usage

2023-02-09 17:05:43 -07:00

dasd_devmap.c

s390/dasd: add aq_timeouts autoquiesce trigger

2023-04-11 19:53:08 -06:00

dasd_diag.c

s390/dasd: use blk_mq_alloc_disk