[PATCH 0/3] Fix RTC and NVRAM OPAL_BUSY loops

[Nicholas Piggin <npiggin@gmail.com>]

This is a couple of important fixes broken out of the series
"first step of standardising OPAL_BUSY handling", that prevents
the kernel from locking up if the NVRAM or RTC hardware does not
respond.

Another one, the console driver, has a similar problem that has
also been hit in testing, but that requires larger fixes to the
opal console and hvc tty driver that won't make it for 4.17.

Thanks,
Nick

Nicholas Piggin (3):
  powerpc/powernv: define a standard delay for OPAL_BUSY type retry
    loops
  powerpc/powernv: Fix OPAL RTC driver OPAL_BUSY loops
  powerpc/powernv: Fix OPAL NVRAM driver OPAL_BUSY loops

 arch/powerpc/include/asm/opal.h             |  3 ++
 arch/powerpc/platforms/powernv/opal-nvram.c |  7 +++-
 arch/powerpc/platforms/powernv/opal-rtc.c   |  8 +++--
 drivers/rtc/rtc-opal.c                      | 37 +++++++++++++--------
 4 files changed, 37 insertions(+), 18 deletions(-)

-- 
2.17.0