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Nicholas Piggin 25b6ee378d powerpc/powernv: Fix OPAL NVRAM driver OPAL_BUSY loops 
commit 3b8070335f upstream.

The OPAL NVRAM driver does not sleep in case it gets OPAL_BUSY or
OPAL_BUSY_EVENT from firmware, which causes large scheduling
latencies, and various lockup errors to trigger (again, BMC reboot
can cause it).

Fix this by converting it to the standard form OPAL_BUSY loop that
sleeps.

Fixes: 628daa8d5a ("powerpc/powernv: Add RTC and NVRAM support plus RTAS fallbacks")
Depends-on: 34dd25de9f ("powerpc/powernv: define a standard delay for OPAL_BUSY type retry loops")
Cc: stable@vger.kernel.org # v3.2+
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-04-24 09:36:28 +02:00
..
alpha vgacon: Set VGA struct resource types 2018-03-24 11:01:25 +01:00
arc .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2018-02-13 10:19:46 +01:00
arm ARM: dts: at91: sama5d4: fix pinctrl compatible string 2018-04-24 09:36:24 +02:00
arm64 ARM64: dts: meson: reduce odroid-c2 eMMC maximum rate 2018-04-24 09:36:23 +02:00
blackfin pinctrl: adi2: Fix Kconfig build problem 2017-12-20 10:10:34 +01:00
c6x License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
cris License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
frv License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
h8300 h8300: remove extraneous __BIG_ENDIAN definition 2018-03-28 18:24:38 +02:00
hexagon License cleanup: add SPDX license identifier to uapi header files with a license 2017-11-02 11:20:11 +01:00
ia64 ia64, sched/cputime: Fix build error if CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y 2018-03-03 10:24:35 +01:00
m32r m32r: fix endianness constraints 2018-02-28 10:19:44 +01:00
m68k m68k: add missing SOFTIRQENTRY_TEXT linker section 2018-02-25 11:07:58 +01:00
metag .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2018-02-13 10:19:46 +01:00
microblaze microblaze: fix endian handling 2018-02-28 10:19:45 +01:00
mips MIPS: lantiq: ase: Enable MFD_SYSCON 2018-03-28 18:24:28 +02:00
mn10300 mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy 2018-02-16 20:23:11 +01:00
nios2 .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2018-02-13 10:19:46 +01:00
openrisc kmemcheck: remove annotations 2018-02-22 15:42:23 +01:00
parisc parisc: Fix HPMC handler by increasing size to multiple of 16 bytes 2018-04-19 08:56:16 +02:00
powerpc powerpc/powernv: Fix OPAL NVRAM driver OPAL_BUSY loops 2018-04-24 09:36:28 +02:00
s390 s390/ipl: ensure loadparm valid flag is set 2018-04-19 08:56:19 +02:00
score License cleanup: add SPDX license identifier to uapi header files with no license 2017-11-02 11:19:54 +01:00
sh SolutionEngine771x: fix Ether platform data 2018-03-03 10:24:36 +01:00
sparc kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2018-02-22 15:42:23 +01:00
tile fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall 2017-12-17 15:07:59 +01:00
um arch, mm: Allow arch_dup_mmap() to fail 2017-12-29 17:53:43 +01:00
unicore32 kmemcheck: stop using GFP_NOTRACK and SLAB_NOTRACK 2018-02-22 15:42:23 +01:00
x86 x86/xen: Delay get_cpu_cap until stack canary is established 2018-04-24 09:36:25 +02:00
xtensa xtensa: fix high memory/reserved memory collision 2018-02-28 10:19:38 +01:00
.gitignore
…
Kconfig kprobes: Use synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y 2017-12-10 13:40:40 +01:00