cpuidle: fix fallback mechanism for suspend to idle in absence of enter_freeze
Commit 51164251 "sched / idle: Drop default_idle_call() fallback from call_cpuidle()" made find_deepest_state() return non-negative value and check all the states with index > 0. Also as a result, find_deepest_state() returns 0 even when enter_freeze callbacks are not implemented and enter_freeze_proper() is called which ends up crashing the kernel. This patch updates the check for index > 0 in cpuidle_enter_freeze and cpuidle_idle_call(when idle_should_freeze is true) to restore the suspend-to-idle functionality in absence of enter_freeze callback. Fixes: 51164251 "sched / idle: Drop default_idle_call() fallback from call_cpuidle()" Signed-off-by: NSudeep Holla <sudeep.holla@arm.com> Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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