[PATCH 13/12] mpic: add affinity callback for IPI "chip"

[Johannes Berg]

This patch adds a dummy affinity callback for the IPI "chip" to avoid
getting a warning ("Cannot set affinity for irq 251") when taking a
CPU offline via sysfs or during suspend.

Signed-off-by: Johannes Berg <johannes at sipsolutions.net>

--- linux-2.6-git.orig/arch/powerpc/sysdev/mpic.c	2007-02-08 00:19:46.105926568 +0100
+++ linux-2.6-git/arch/powerpc/sysdev/mpic.c	2007-02-08 00:22:31.810926568 +0100
@@ -700,6 +700,12 @@ static void mpic_end_ipi(unsigned int ir
 	mpic_eoi(mpic);
 }
 
+static void mpic_set_ipi_affinity(unsigned int irq, cpumask_t cpumask)
+{
+	/* we can't set affinity but also don't need to since we only
+	 * send IPIs to online CPUs */
+}
+
 #endif /* CONFIG_SMP */
 
 static void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
@@ -788,6 +794,7 @@ static struct irq_chip mpic_ipi_chip = {
 	.mask		= mpic_mask_ipi,
 	.unmask		= mpic_unmask_ipi,
 	.eoi		= mpic_end_ipi,
+	.set_affinity	= mpic_set_ipi_affinity,
 };
 #endif /* CONFIG_SMP */