From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Thu, 26 Feb 2015 20:50:41 +0000 (+0900)
Subject: ARM: EXYNOS: Don't use LDREX and STREX after disabling cache coherency
X-Git-Tag: omap-for-v4.1/wl12xx-dt~9^2~14^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ca489c58ef0b81cc9c9252fd92e6c9bb38d3c408;p=pandora-kernel.git

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>
---

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