kernel/cpu_pm: Fix uninitted local in cpu_pm
authorDouglas Anderson <dianders@chromium.org>
Mon, 4 May 2020 17:50:17 +0000 (10:50 -0700)
committerBjorn Andersson <bjorn.andersson@linaro.org>
Fri, 15 May 2020 18:44:34 +0000 (11:44 -0700)
commitb5945214b76a1f22929481724ffd448000ede914
tree2e7fbfed30f30e0e94cced42d419262c0989707f
parentc45def5d804abaa48c205f8ba5cd52bfbeeae70c
kernel/cpu_pm: Fix uninitted local in cpu_pm

cpu_pm_notify() is basically a wrapper of notifier_call_chain().
notifier_call_chain() doesn't initialize *nr_calls to 0 before it
starts incrementing it--presumably it's up to the callers to do this.

Unfortunately the callers of cpu_pm_notify() don't init *nr_calls.
This potentially means you could get too many or two few calls to
CPU_PM_ENTER_FAILED or CPU_CLUSTER_PM_ENTER_FAILED depending on the
luck of the stack.

Let's fix this.

Fixes: ab10023e0088 ("cpu_pm: Add cpu power management notifiers")
Cc: stable@vger.kernel.org
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200504104917.v6.3.I2d44fc0053d019f239527a4e5829416714b7e299@changeid
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
kernel/cpu_pm.c