diff options
| author |   Liu Jiang <jiang.liu@linux.intel.com> | 2016-01-12 13:18:06 -0700 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2016-01-14 13:59:09 -0600 |
| commit | bf6f869f8c111ba265cd199c64b25c646987500a (patch) | |
| tree | df784b909775f2396870d5a2fb3f86431c85a98b /kernel/irq | |
| parent | Linux 4.4-rc2 (diff) | |
| download | linux-dev-bf6f869f8c111ba265cd199c64b25c646987500a.tar.xz linux-dev-bf6f869f8c111ba265cd199c64b25c646987500a.zip | |
genirq/MSI: Relax msi_domain_alloc() to support parentless MSI irqdomains
Previously msi_domain_alloc() assumed MSI irqdomains always had parent
irqdomains, but that's not true for the new Intel VMD devices. Relax
msi_domain_alloc() to support parentless MSI irqdomains.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/msi.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 6b0c0b74a2a1..5e15cb4b2f00 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -109,9 +109,11 @@ static int msi_domain_alloc(struct irq_domain *domain, unsigned int virq, if (irq_find_mapping(domain, hwirq) > 0) return -EEXIST; - ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); - if (ret < 0) - return ret; + if (domain->parent) { + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); + if (ret < 0) + return ret; + } for (i = 0; i < nr_irqs; i++) { ret = ops->msi_init(domain, info, virq + i, hwirq + i, arg); |