CHROMIUM: power: sbs-battery: Prevent CAPACITY_MODE races
A subset of smart battery commands return charge or energy depending on
the CAPACITY_MODE bit setting of BatteryMode(). In order to
unambiguously read a charge or energy value, it is necessary to ensure
that CAPACITY_MODE is set as desired, and not changed for the duration
of the attribute read.
BUG=chromium:686942
TEST=On kevin, spam reads to charge_full battery sysfs attribute while
performing suspend_stress_test, verify that the same value is always
returned.
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: Ic39e8d7f982d7045a2da6bf6fe835c2c3434815c
Reviewed-on: https://chromium-review.googlesource.com/531760
Commit-Ready: Shawn N <shawnn@chromium.org>
Tested-by: Shawn N <shawnn@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
1 file changed
