[ 21/82] ARM: 7476/1: vfp: only clear vfp state for current cpu in vfp_pm_suspend

[Greg Kroah-Hartman]

From: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>

3.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Colin Cross <ccross@xxxxxxxxxxx>

commit a84b895a2348f0dbff31b71ddf954f70a6cde368 upstream.

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.

Signed-off-by: Colin Cross <ccross@xxxxxxxxxxx>
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 arch/arm/vfp/vfpmodule.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -460,7 +460,7 @@ 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;
 }


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