[patch] fix the irq migration

From: Siddha, Suresh B
Date: Thu Feb 22 2007 - 20:57:28 EST

While debugging some other irq migration issue, observed this issue with
-git kernels. Ingo, please ACK it.

With the commit 76d2160147f43f982dfe881404cfde9fd0a9da21, irq_chip
default_disable() became an empty function. And with this change, irq
migration in the case of Edge triggered IO-APIC and MSI interrupts happens
with out masking the irq.

Appended patch fixes by using the mask/unmask handlers of irq_chip directly
while doing the irq migration.

Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>

diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 4baa3bb..14ff345 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -66,11 +66,11 @@ void move_native_irq(int irq)

if (likely(!(desc->status & IRQ_DISABLED)))
- desc->chip->disable(irq);
+ desc->chip->mask(irq);


if (likely(!(desc->status & IRQ_DISABLED)))
- desc->chip->enable(irq);
+ desc->chip->unmask(irq);

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