ARM: 7476/1: vfp: only clear vfp state for current cpu in vfp_pm_suspend

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@android.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index b0197b2c857d12588d1d77a026e9f6a60c38b22d..da3b9292f9f0e04407092ec8b70a87464c3d1ceb 100644 (file)
--- 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;
 }