diff options
| author |   Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2015-02-27 05:50:41 +0900 |
|---|---|---|
| committer |   Kukjin Kim <kgene@kernel.org> | 2015-02-27 05:50:52 +0900 |
| commit | ca489c58ef0b81cc9c9252fd92e6c9bb38d3c408 (patch) | |
| tree | 0990ef777d9e882e193e92b93273b53bf715dc2e /arch/arm/mach-exynos/platsmp.c | |
| parent | Linux 4.0-rc1 (diff) | |
| download | linux-dev-ca489c58ef0b81cc9c9252fd92e6c9bb38d3c408.tar.xz linux-dev-ca489c58ef0b81cc9c9252fd92e6c9bb38d3c408.zip | |
ARM: EXYNOS: Don't use LDREX and STREX after disabling cache coherency
During CPU shutdown the exynos_cpu_power_down() is called after
disabling cache coherency and it uses LDREX and STREX instructions (by
calling of_machine_is_compatible() -> kobject_get() -> kref_get()).
The LDREX and STREX should not be used after disabling the cache
coherency so just use soc_is_exynos().
Fixes: adc548d77c22 ("ARM: EXYNOS: Use MCPM call-backs to support S2R
on exynos5420")
Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Diffstat (limited to 'arch/arm/mach-exynos/platsmp.c')
| -rw-r--r-- | arch/arm/mach-exynos/platsmp.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c index 3f32c47a6d74..d2e9f12d12f1 100644 --- a/arch/arm/mach-exynos/platsmp.c +++ b/arch/arm/mach-exynos/platsmp.c @@ -126,8 +126,7 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious) */ void exynos_cpu_power_down(int cpu) { - if (cpu == 0 && (of_machine_is_compatible("samsung,exynos5420") || - of_machine_is_compatible("samsung,exynos5800"))) { + if (cpu == 0 && (soc_is_exynos5420() || soc_is_exynos5800())) { /* * Bypass power down for CPU0 during suspend. Check for * the SYS_PWR_REG value to decide if we are suspending |