diff options
| author | Keith Busch <keith.busch@intel.com> | 2017-07-21 02:33:53 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-08-04 00:50:12 +0300 |
| commit | 37d7f818a4629ebbb94c2c092c533a437ba7f95c (patch) | |
| tree | 440d6736339fc991968805a9c609ee21e4aa919e /drivers/pci/host/vmd.c | |
| parent | 16f73eb02d7e1765ccab3d2018e0bd98eb93d973 (diff) | |
| download | linux-37d7f818a4629ebbb94c2c092c533a437ba7f95c.tar.xz | |
PCI: vmd: Reserve IRQ pre-vector for better affinity
The driver has a special purpose for the VMD device's first IRQ, so this
one shouldn't be considered for IRQ affinity.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/host/vmd.c')
| -rw-r--r-- | drivers/pci/host/vmd.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/pci/host/vmd.c b/drivers/pci/host/vmd.c index 6088c3083194..539da102f3d7 100644 --- a/drivers/pci/host/vmd.c +++ b/drivers/pci/host/vmd.c @@ -671,6 +671,14 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id) struct vmd_dev *vmd; int i, err; + /* + * The first vector is reserved for special use, so start affinity at + * the second vector + */ + struct irq_affinity affd = { + .pre_vectors = 1, + }; + if (resource_size(&dev->resource[VMD_CFGBAR]) < (1 << 20)) return -ENOMEM; @@ -696,8 +704,8 @@ static int vmd_probe(struct pci_dev *dev, const struct pci_device_id *id) if (vmd->msix_count < 0) return -ENODEV; - vmd->msix_count = pci_alloc_irq_vectors(dev, 1, vmd->msix_count, - PCI_IRQ_MSIX | PCI_IRQ_AFFINITY); + vmd->msix_count = pci_alloc_irq_vectors_affinity(dev, 1, vmd->msix_count, + PCI_IRQ_MSIX | PCI_IRQ_AFFINITY, &affd); if (vmd->msix_count < 0) return vmd->msix_count; |