From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Osipenko Subject: [PATCH v9 08/17] ARM: tegra: Make outer_disable() open-coded Date: Thu, 13 Feb 2020 02:51:25 +0300 Message-ID: <20200212235134.12638-9-digetx@gmail.com> References: <20200212235134.12638-1-digetx@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200212235134.12638-1-digetx@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Thierry Reding , Jonathan Hunter , Peter De Schrijver , "Rafael J. Wysocki" , Daniel Lezcano , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Jasper Korten , David Heidelberg , Peter Geis Cc: linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-tegra@vger.kernel.org The outer_disable() of Tegra's suspend code is open-coded now since that helper produces spurious warning message about secondary CPUs being online when CPU enters into LP2 from cpuidle. The secondaries are actually halted by the cpuidle driver on entering into LP2 idle-state, but the online status is not touched by the cpuidle. This fixes a storm of warnings once LP2 idling state is enabled on Tegra30. The outer_disable() helper has sanity checks for interrupts and secondary CPUs being disabled and we are pretty confident about the interrupts state during of CPU idling / system suspend. The rail-off status check is added in this patch as equivalent for the "num_online_cpus() > 1". Acked-by: Peter De Schrijver Tested-by: Peter Geis Tested-by: Jasper Korten Tested-by: David Heidelberg Signed-off-by: Dmitry Osipenko --- arch/arm/mach-tegra/pm.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c index 7d9ef26e52a7..d1e1a61b12cf 100644 --- a/arch/arm/mach-tegra/pm.c +++ b/arch/arm/mach-tegra/pm.c @@ -138,6 +138,10 @@ void tegra_pm_set_cpu_in_lp2(void) static int tegra_sleep_cpu(unsigned long v2p) { + if (tegra_cpu_car_ops->rail_off_ready && + WARN_ON(!tegra_cpu_rail_off_ready())) + return -EBUSY; + /* * L2 cache disabling using kernel API only allowed when all * secondary CPU's are offline. Cache have to be disabled with @@ -146,9 +150,10 @@ static int tegra_sleep_cpu(unsigned long v2p) * if any of secondary CPU's is online and this is the LP2-idle * code-path only for Tegra20/30. */ - if (trusted_foundations_registered()) - outer_disable(); - +#ifdef CONFIG_OUTER_CACHE + if (trusted_foundations_registered() && outer_cache.disable) + outer_cache.disable(); +#endif /* * Note that besides of setting up CPU reset vector this firmware * call may also do the following, depending on the FW version: -- 2.24.0