[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>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 0b84b7c775d8..57b1208ef1c3 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);
 }