From: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Date: Mon, 30 Apr 2007 20:38:11 +0000 (+1000)
Subject: [POWERPC] Fix spurious vectors on weird MPIC
X-Git-Tag: v2.6.22-rc1~358^2~58
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5cddd2e355d0df400782dae80722945c8197b1c5;p=linux-2.6

[POWERPC] Fix spurious vectors on weird MPIC

The weird TSI 10x MPIC needs an EOI after getting a spurious vector.  This
patch uses the existing MPIC_SPV_EOI flag to fix this issue.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 0b84b7c775..57b1208ef1 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -1333,8 +1333,11 @@ unsigned int mpic_get_one_irq(struct mpic *mpic)
 #ifdef DEBUG_LOW
 	DBG("%s: get_one_irq(): %d\n", mpic->name, src);
 #endif
-	if (unlikely(src == mpic->spurious_vec))
+	if (unlikely(src == mpic->spurious_vec)) {
+		if (mpic->flags & MPIC_SPV_EOI)
+			mpic_eoi(mpic);
 		return NO_IRQ;
+	}
 	return irq_linear_revmap(mpic->irqhost, src);
 }