linux-stable/arch
Andrew Donnellan f74dcbfd27 powerpc/pseries: Fix handling of PLPKS object flushing timeout
plpks_confirm_object_flushed() uses the H_PKS_CONFIRM_OBJECT_FLUSHED hcall
to check whether changes to an object in the Platform KeyStore have been
flushed to non-volatile storage.

The hcall returns two output values, the return code and the flush status.
plpks_confirm_object_flushed() polls the hcall until either the flush
status has updated, the return code is an error, or a timeout has been
exceeded.

While we're still polling, the hcall is returning H_SUCCESS (0) as the
return code. In the timeout case, this means that upon exiting the polling
loop, rc is 0, and therefore 0 is returned to the user.

Handle the timeout case separately and return ETIMEDOUT if triggered.

Fixes: 2454a7af0f ("powerpc/pseries: define driver for Platform KeyStore")
Reported-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Tested-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Russell Currey <ruscur@russell.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230210080401.345462-2-ajd@linux.ibm.com
2023-02-12 22:12:36 +11:00
..
alpha MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
arc MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
arm ARM: SoC fixes for 6.2 2022-12-19 16:07:59 -06:00
arm64 remoteproc updates for v6.2 2022-12-21 09:37:14 -08:00
csky arch/csky patches for 6.2-rc1 2022-12-19 07:51:30 -06:00
hexagon MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
ia64 - Add the call depth tracking mitigation for Retbleed which has 2022-12-14 15:03:00 -08:00
loongarch LoongArch changes for v6.2 2022-12-19 08:23:27 -06:00
m68k m68k: remove broken strcmp implementation 2022-12-21 08:56:43 -08:00
microblaze MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
mips Fixes due to DT changes 2022-12-23 10:49:45 -08:00
nios2 MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
openrisc MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
parisc parisc architecture fixes for kernel v6.2-rc1: 2022-12-20 08:43:53 -06:00
powerpc powerpc/pseries: Fix handling of PLPKS object flushing timeout 2023-02-12 22:12:36 +11:00
riscv KVM/riscv changes for 6.2 2022-12-21 18:52:15 -08:00
s390 random: do not include <asm/archrandom.h> from random.h 2022-12-20 03:13:45 +01:00
sh treewide: Convert del_timer*() to timer_shutdown*() 2022-12-25 13:38:09 -08:00
sparc MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
um New Feature: 2022-12-17 14:06:53 -06:00
x86 - Pass only an initialized perf event attribute to the LSM hook 2023-01-01 11:27:00 -08:00
xtensa MM patches for 6.2-rc1. 2022-12-13 19:29:45 -08:00
.gitignore
Kconfig arm64 fixes for -rc1 2022-12-16 13:46:41 -06:00