[SRU][Bionic][PATCH 0/2] Fixes for LP:1777857

[Joseph Salisbury]

== SRU Justification ==
IBM is seeing kernel traces during testing.  This is due to a missing 
backport of some kernel fixes in the RTC driver, which is commit
682e6b4da5cb.  Commit 682e6b4da5cb was also cc'd to upstream stable, but
it has not landed in Bionic as of yet.  It is also a fix to upstream
commit 628daa8d5abf.

Commit 34dd25de9fe3 is also needed as a prereq to define
OPAL_BUSY_DELAY_MS.

== Fixes ==
34dd25de9fe3 ("powerpc/powernv: define a standard delay for OPAL_BUSY type retry loops")
682e6b4da5cb ("rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops")

== Regression Potential ==
Low.  Limited to powerpc.  Fixes a current regression.

== Test Case ==
A test kernel was built with these patches and tested by the original bug reporter.
The bug reporter states the test kernel resolved the bug.

Nicholas Piggin (2):
  powerpc/powernv: define a standard delay for OPAL_BUSY type retry
    loops
  rtc: opal: Fix OPAL RTC driver OPAL_BUSY loops

 arch/powerpc/include/asm/opal.h           |  3 +++
 arch/powerpc/platforms/powernv/opal-rtc.c |  8 ++++---
 drivers/rtc/rtc-opal.c                    | 37 +++++++++++++++++++------------
 3 files changed, 31 insertions(+), 17 deletions(-)

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2.7.4