diff options
| author | Bjorn Helgaas | 2021-11-05 11:28:44 -0500 |
|---|---|---|
| committer | Bjorn Helgaas | 2021-11-05 11:28:44 -0500 |
| commit | efe6856390bae3a2aa170bdd51c34b8832b83bc6 (patch) | |
| tree | 812a150653bf1998deca69b4fc8d3495ba943cee /Documentation | |
| parent | 4917f7189bd8be326d0910055b029d3cbf50256c (diff) | |
| parent | ac8e3cef588c5affc6dfa7b693ec64bbf3cead6a (diff) | |
Merge branch 'pci/msi'
- Document sysfs "irq" attribute, which contains either the INTx IRQ (the
intended behavior) or the first MSI IRQ (historical mistake retained for
backwards compatibility) (Barry Song)
- Rework "irq" sysfs show function to explicitly fetch first MSI IRQ
instead of depending on core to put it in dev->irq, to enable future core
cleanup (Barry Song)
* pci/msi:
PCI/sysfs: Explicitly show first MSI IRQ for 'irq'
PCI: Document /sys/bus/pci/devices/.../irq
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-pci | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci index d4ae03296861..fef498c34fd9 100644 --- a/Documentation/ABI/testing/sysfs-bus-pci +++ b/Documentation/ABI/testing/sysfs-bus-pci @@ -96,6 +96,17 @@ Description: This attribute indicates the mode that the irq vector named by the file is in (msi vs. msix) +What: /sys/bus/pci/devices/.../irq +Date: August 2021 +Contact: Linux PCI developers <linux-pci@vger.kernel.org> +Description: + If a driver has enabled MSI (not MSI-X), "irq" contains the + IRQ of the first MSI vector. Otherwise "irq" contains the + IRQ of the legacy INTx interrupt. + + "irq" being set to 0 indicates that the device isn't + capable of generating legacy INTx interrupts. + What: /sys/bus/pci/devices/.../remove Date: January 2009 Contact: Linux PCI developers <linux-pci@vger.kernel.org> |