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| author |   Barry Song <song.bao.hua@hisilicon.com> | 2021-08-25 18:26:34 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2021-10-18 16:16:28 -0500 |
| commit | 5e3be666f46b43169e80041657c4b63eaf1ae8de (patch) | |
| tree | f0a4a0b55d5f4db3fcaa113850d776c578afa24f /drivers/pci/pci-sysfs.c | |
| parent | Linux 5.15-rc2 (diff) | |
| download | linux-dev-5e3be666f46b43169e80041657c4b63eaf1ae8de.tar.xz linux-dev-5e3be666f46b43169e80041657c4b63eaf1ae8de.zip | |
PCI: Document /sys/bus/pci/devices/.../irq
Document /sys/bus/pci/devices/.../irq.
This file contains the IRQ of the INTx interrupt (or zero if the device
doesn't support INTx interrupts).
If the device has enabled MSI (not MSI-X), it contains the first MSI IRQ
instead. This is a historical mistake because devices may support several
MSI or MSI-X vectors, and this file can't contain them all. But we
preserve this behavior to avoid breaking userspace.
[bhelgaas: commit log]
Link: https://lore.kernel.org/r/20210825102636.52757-2-21cnbao@gmail.com
Signed-off-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
0 files changed, 0 insertions, 0 deletions