pm: exynos: Skip re-enabling L2 cache for early waking-up.

If L2 cache is powered on, accessing L2 cache's control register is
forbidden. Ohterwise system will hang up.
So, when system fails to go to sleep, we have to avoid reset L2 cache
because it still be powered on.

Change-Id: Ie0271619116012627477e332b0cd5e60a27882ff
Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>

diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index d5bac0d..e5421fa 100644 (file)
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -273,10 +273,7 @@ static int exynos_pm_suspend(void)
 static void exynos_pm_resume(void)
 {
        unsigned long tmp;
-#ifdef CONFIG_CACHE_L2X0
-       if (call_firmware_op(l2x0_resume) < 0)
-               outer_resume();
-#endif
+
        /*
         * If PMU failed while entering sleep mode, WFI will be
         * ignored by PMU and then exiting cpu_do_idle().
@@ -292,6 +289,7 @@ static void exynos_pm_resume(void)
                /* No need to perform below restore code */
                goto early_wakeup;
        }
+
        if (!soc_is_exynos5250()
            && call_firmware_op(c15resume, save_arm_register) == -ENOSYS)
        {
@@ -330,6 +328,12 @@ static void exynos_pm_resume(void)
 #ifdef CONFIG_SMP
                scu_enable(S5P_VA_SCU);
 #endif
+
+#ifdef CONFIG_CACHE_L2X0
+       if (call_firmware_op(l2x0_resume) < 0)
+               outer_resume();
+#endif
+
        }
 
 early_wakeup: