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authorLinus Torvalds <torvalds@linux-foundation.org>2010-04-06 13:03:22 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-06 13:03:22 -0700
commit94c4fcec0144e032ef7d4ec761ab81d570b0bc2a (patch)
treeb67880526801ce7af4c6bc847fcb1742569dc0f9
parent14e71e4fb94c340273534a6d7f210aa82a3ca717 (diff)
parent753649dbc49345a73a2454c770a3f2d54d11aec6 (diff)
downloadlinux-2.6.34-ux500-94c4fcec0144e032ef7d4ec761ab81d570b0bc2a.tar.gz
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: genirq: Force MSI irq handlers to run with interrupts disabled
-rw-r--r--kernel/irq/manage.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 398fda155f6..704e488730a 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;