luck/tmp_suning_uos_patched
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Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* '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
This commit is contained in:
Linus Torvalds 2010-04-06 13:03:22 -07:00
commit 94c4fcec01
1 changed files with 10 additions and 0 deletions
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10
kernel/irq/manage.c
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@ -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;