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Commit 1f3b6045 authored by Russ Anderson's avatar Russ Anderson Committed by Tony Luck
Browse files

[IA64] Disable/re-enable CPE interrupts on Altix 



When the CPE handler encounters too many CPEs (such as a solid single
bit memory error), it sets up a polling timer and disables the CPE
interrupt (to avoid excessive overhead logging the stream of single
bit errors).  disable_irq_nosync() calls chip->disable() to provide
a chipset specifiec interface for disabling the interrupt.  This patch
adds the Altix specific support to disable and re-enable the CPE interrupt.

Signed-off-by: default avatarRuss Anderson <(rja@sgi.com)>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent adb34022

arch/ia64/kernel/mca.c

+1 −1
Original line number Diff line number Diff line
@@ -571,7 +571,7 @@ ia64_mca_cpe_int_handler (int cpe_irq, void *arg) 
 *  Outputs

 *      None

 */

static void __init

void

ia64_mca_register_cpev (int cpev)

{

	/* Register the CPE interrupt vector with SAL */

arch/ia64/sn/kernel/irq.c

+7 −1
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ 
 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (c) 2000-2006 Silicon Graphics, Inc.  All Rights Reserved.

 * Copyright (c) 2000-2007 Silicon Graphics, Inc.  All Rights Reserved.

 */



#include <linux/irq.h>
@@ -85,12 +85,18 @@ static void sn_shutdown_irq(unsigned int irq) 
{

}



extern void ia64_mca_register_cpev(int);



static void sn_disable_irq(unsigned int irq)

{

	if (irq == local_vector_to_irq(IA64_CPE_VECTOR))

		ia64_mca_register_cpev(0);

}



static void sn_enable_irq(unsigned int irq)

{

	if (irq == local_vector_to_irq(IA64_CPE_VECTOR))

		ia64_mca_register_cpev(irq);

}



static void sn_ack_irq(unsigned int irq)