3.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Krzysztof Kozlowski <k.kozlow...@samsung.com>
commit ca489c58ef0b81cc9c9252fd92e6c9bb38d3c408 upstream.
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 <sb...@codeaurora.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlow...@samsung.com>
Reviewed-by: Stephen Boyd <sb...@codeaurora.org>
Signed-off-by: Kukjin Kim <kg...@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/arm/mach-exynos/platsmp.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -126,8 +126,7 @@ static inline void platform_do_lowpower(
*/
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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
