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Commit 46a5d61d authored by Raghavendra Kakarla's avatar Raghavendra Kakarla Committed by Gerrit - the friendly Code Review server
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drivers: lpm-levels: Use cpu_do_idle for shallower LPM entry 



dsb should be invoked before wfi instruction without which
core can get stuck or do not respond to IPIs. Use cpu_do_idle
that invokes both dsb and wfi instructions for shallower mode
entry.

Change-Id: I2e9d2317048781590a626a0b3d93f23bbf9eb496
Signed-off-by: default avatarRaghavendra Kakarla <rkakarla@codeaurora.org>
parent 4d796e79

drivers/cpuidle/lpm-levels.c

+2 −2
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only



/* Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.

/* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.

 * Copyright (C) 2006-2007 Adam Belay <abelay@novell.com>

 * Copyright (C) 2009 Intel Corporation

 */
@@ -1118,7 +1118,7 @@ static bool psci_enter_sleep(struct lpm_cpu *cpu, int idx, bool from_idle) 


	if (!idx) {

		stop_critical_timings();

		wfi();

		cpu_do_idle();

		start_critical_timings();

		return true;

	}