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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-12 12:41:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-12 12:41:51 -0700 |
| commit | 25db69188e0369a8c4ac53f71e935a8b6e22e117 (patch) | |
| tree | a371b975f33f280e1c3e43e9c920d578805312ab /kernel | |
| parent | Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
| parent | genirq/msi: Make sure PCI MSIs are activated early (diff) | |
| download | wireguard-linux-25db69188e0369a8c4ac53f71e935a8b6e22e117.tar.xz wireguard-linux-25db69188e0369a8c4ac53f71e935a8b6e22e117.zip | |
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Ingo Molnar:
"A fix for an MSI regression"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/msi: Make sure PCI MSIs are activated early
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/irq/msi.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 54999350162c..19e9dfbe97fa 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -359,6 +359,17 @@ int msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev, else dev_dbg(dev, "irq [%d-%d] for MSI\n", virq, virq + desc->nvec_used - 1); + /* + * This flag is set by the PCI layer as we need to activate + * the MSI entries before the PCI layer enables MSI in the + * card. Otherwise the card latches a random msi message. + */ + if (info->flags & MSI_FLAG_ACTIVATE_EARLY) { + struct irq_data *irq_data; + + irq_data = irq_domain_get_irq_data(domain, desc->irq); + irq_domain_activate_irq(irq_data); + } } return 0; |