Commit 687d4ad9 authored Nov 28, 2017 by Lina Iyer

drivers: cpuidle: lpm-levels: Do not set affinity level for 0 mode id



A PSCI ID of zero doesn't require any setting from the firmware. In this
case, incrementing the affinity level would be incorrect, especially for
a single core system where the CPU and Cluster states are linearized.
The Sleep driver in the kernel needs to different between CPU/Cluster
states to send System votes through before sleep.

Do not increment affinity level when PSCI ID is zero.

Change-Id: I4739ee1ac893d30e5ab5f24b1c388ef58acda06a
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
Signed-off-by: Lina Iyer <ilina@codeaurora.org>

parent 90950c75

drivers/cpuidle/lpm-levels.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1244,7 +1244,6 @@ int get_cluster_id(struct lpm_cluster cluster, int aff_lvl)

		state_id \|= (level->psci_id & cluster->psci_mode_mask)
		<< cluster->psci_mode_shift;
		(*aff_lvl)++;

		/*
		* We may have updated the broadcast timers, update
		@@ -1252,6 +1251,8 @@ int get_cluster_id(struct lpm_cluster cluster, int aff_lvl)
		*/
		if (level->notify_rpm)
		system_sleep_update_wakeup();
		if (level->psci_id)
		(*aff_lvl)++;
		}
		unlock_and_return:
		spin_unlock(&cluster->sync_lock);