From: Colin Cross <ccross@android.com>
Date: Sat, 28 Apr 2012 01:04:18 +0000 (-0700)
Subject: ARM: vfp: only clear vfp state for current cpu in vfp_pm_suspend
X-Git-Tag: firefly_0821_release~9235
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8d5e8b025ee36235b58e6da279c7ac6e24126f3a;p=firefly-linux-kernel-4.4.55.git

ARM: vfp: only clear vfp state for current cpu in vfp_pm_suspend

vfp_pm_suspend runs on each cpu, only clear the hardware state
pointer for the current cpu.  Prevents a possible crash if one
cpu clears the hw state pointer when another cpu has already
checked if it is valid.

Change-Id: I997ab1554944eba86730818ff242d7ebe1b32736
Signed-off-by: Colin Cross <ccross@android.com>
---

diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 74d4f38e5c6e..e37c5fdbdcd5 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -426,7 +426,7 @@ static int vfp_pm_suspend(void)
 	}
 
 	/* clear any information we had about last context state */
-	memset(vfp_current_hw_state, 0, sizeof(vfp_current_hw_state));
+	vfp_current_hw_state[ti->cpu] = NULL;
 
 	return 0;
 }