linux/arch
Alexandra Winter d2b59bd4b0 s390/qeth: fix deadlock during failing recovery
Commit 0b9902c1fc ("s390/qeth: fix deadlock during recovery") removed
taking discipline_mutex inside qeth_do_reset(), fixing potential
deadlocks. An error path was missed though, that still takes
discipline_mutex and thus has the original deadlock potential.

Intermittent deadlocks were seen when a qeth channel path is configured
offline, causing a race between qeth_do_reset and ccwgroup_remove.
Call qeth_set_offline() directly in the qeth_do_reset() error case and
then a new variant of ccwgroup_set_offline(), without taking
discipline_mutex.

Fixes: b41b554c1e ("s390/qeth: fix locking for discipline setup / removal")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-09-21 20:02:24 -07:00
..
alpha alpha: Declare virt_to_phys and virt_to_bus parameter as pointer to volatile 2021-09-16 11:27:32 -07:00
arc Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
arm ARM development updates for 5.15: 2021-09-09 13:25:49 -07:00
arm64 Merge branch 'gcc-min-version-5.1' (make gcc-5.1 the minimum version) 2021-09-13 10:43:04 -07:00
csky Tracing updates for 5.15: 2021-09-05 11:50:41 -07:00
h8300 Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
hexagon Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
ia64 Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
m68k m68k: mvme: Remove overdue #warnings in RTC handling 2021-09-13 11:19:05 +02:00
microblaze Microblaze patches for 5.15-rc1 2021-09-08 16:02:13 -07:00
mips Merge branch 'linus' into smp/urgent 2021-09-11 00:38:47 +02:00
nds32 nds32/setup: remove unused memblock_region variable in setup_memory() 2021-09-08 18:45:53 -07:00
nios2 Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
openrisc Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
parisc parisc: Use absolute_pointer() to define PAGE0 2021-09-16 08:35:42 +02:00
powerpc powerpc/boot: Fix build failure since GCC 4.9 removal 2021-09-14 08:33:32 -07:00
riscv Merge branch 'gcc-min-version-5.1' (make gcc-5.1 the minimum version) 2021-09-13 10:43:04 -07:00
s390 s390/qeth: fix deadlock during failing recovery 2021-09-21 20:02:24 -07:00
sh Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
sparc sparc: avoid stringop-overread errors 2021-09-15 13:42:33 -07:00
um This pull request contains the following changes for UML: 2021-09-09 13:45:26 -07:00
x86 hyperv-fixes for 5.15-rc2 2021-09-15 17:18:56 -07:00
xtensa Tracing updates for 5.15: 2021-09-05 11:50:41 -07:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kconfig Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00