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From: Thomas Gleixner on 6 Apr 2010 15:50
B1;2005;0cLinus,

Please pull the latest irq-core-for-linus git tree from:

git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git irq-core-for-linus

Thanks,

tglx

------------------>
Thomas Gleixner (1):
genirq: Force MSI irq handlers to run with interrupts disabled


kernel/irq/manage.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 398fda1..704e488 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -757,6 +757,16 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
if (new->flags & IRQF_ONESHOT)
desc->status |= IRQ_ONESHOT;

+ /*
+ * Force MSI interrupts to run with interrupts
+ * disabled. The multi vector cards can cause stack
+ * overflows due to nested interrupts when enough of
+ * them are directed to a core and fire at the same
+ * time.
+ */
+ if (desc->msi_desc)
+ new->flags |= IRQF_DISABLED;
+
if (!(desc->status & IRQ_NOAUTOEN)) {
desc->depth = 0;
desc->status &= ~IRQ_DISABLED;
--
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