linux_dsm_epyc7002/drivers/s390/block
Stefan Haberland 41995342b4 s390/dasd: fix endless loop after read unit address configuration
After getting a storage server event that causes the DASD device driver
to update its unit address configuration during a device shutdown there is
the possibility of an endless loop in the device driver.

In the system log there will be ongoing DASD error messages with RC: -19.

The reason is that the loop starting the ruac request only terminates when
the retry counter is decreased to 0. But in the sleep_on function there are
early exit paths that do not decrease the retry counter.

Prevent an endless loop by handling those cases separately.

Remove the unnecessary do..while loop since the sleep_on function takes
care of retries by itself.

Fixes: 8e09f21574 ("[S390] dasd: add hyper PAV support to DASD device driver, part 1")
Cc: stable@vger.kernel.org # 2.6.25+
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-08-01 20:46:14 -06:00
..
dasd_3990_erp.c s390/dasd: configurable IFCC handling 2018-02-22 15:31:23 +01:00
dasd_alias.c s390/dasd: fix endless loop after read unit address configuration 2019-08-01 20:46:14 -06:00
dasd_devmap.c s390/dasd: Recognise data for ESE volumes 2019-07-11 20:39:53 +02:00
dasd_diag.c s390/dasd: Make dasd_setup_queue() a discipline function 2019-07-11 20:39:54 +02:00
dasd_diag.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dasd_eckd.c s390/dasd: Handle out-of-space constraint 2019-07-11 20:39:54 +02:00
dasd_eckd.h s390/dasd: Handle out-of-space constraint 2019-07-11 20:39:54 +02:00
dasd_eer.c s390/dasd: Handle out-of-space constraint 2019-07-11 20:39:54 +02:00
dasd_erp.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dasd_fba.c s390/dasd: Use ALIGN_DOWN macro 2019-07-11 20:39:54 +02:00
dasd_fba.h s390/dasd: Make dasd_setup_queue() a discipline function 2019-07-11 20:39:54 +02:00
dasd_genhd.c block: genhd: add 'groups' argument to device_add_disk 2018-09-28 08:30:28 -06:00
dasd_int.h s390/dasd: Handle out-of-space constraint 2019-07-11 20:39:54 +02:00
dasd_ioctl.c s390/dasd: Add new ioctl to release space 2019-07-11 20:39:54 +02:00
dasd_proc.c s390/drivers: fix proc/debugfs file permissions 2018-12-13 10:42:24 +01:00
dasd.c s390/dasd: Handle out-of-space constraint 2019-07-11 20:39:54 +02:00
dcssblk.c libnvdimm: add dax_dev sync flag 2019-07-05 15:19:10 -07:00
Kconfig s390/Kconfig: pedantic cleanups 2019-06-04 15:03:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
scm_blk.c block: genhd: add 'groups' argument to device_add_disk 2018-09-28 08:30:28 -06:00
scm_blk.h Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-11-13 11:47:01 -08:00
scm_drv.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xpram.c block: Use blk_queue_flag_*() in drivers instead of queue_flag_*() 2018-03-08 14:13:48 -07:00