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-rw-r--r--arch/ia64/sn/kernel/irq.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 96c31b4180c3..0c66dbdd1d72 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -5,7 +5,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (c) 2000-2007 Silicon Graphics, Inc. All Rights Reserved.
+ * Copyright (c) 2000-2008 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/irq.h>
@@ -375,6 +375,7 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
int cpu = nasid_slice_to_cpuid(nasid, slice);
#ifdef CONFIG_SMP
int cpuphys;
+ irq_desc_t *desc;
#endif
pci_dev_get(pci_dev);
@@ -391,6 +392,12 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
#ifdef CONFIG_SMP
cpuphys = cpu_physical_id(cpu);
set_irq_affinity_info(sn_irq_info->irq_irq, cpuphys, 0);
+ desc = irq_to_desc(sn_irq_info->irq_irq);
+ /*
+ * Affinity was set by the PROM, prevent it from
+ * being reset by the request_irq() path.
+ */
+ desc->status |= IRQ_AFFINITY_SET;
#endif
}