From: Emil Velikov <[email protected]> Currently the revision isn't available via sysfs/libudev thus if one wants to know the value they need to read through the config file.
This in itself wakes/powers up the device, causing unwanted delay since it can be quite costly. Expose the revision as a separate file, just like we do for the device, vendor, their subsystem version and class. Cc: Jammy Zhou <[email protected]> Cc: Michel Dänzer <[email protected]> Cc: Bjorn Helgaas <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Emil Velikov <[email protected]> --- Gents, I'm not subscribed to the mailing list so please keep me in the CC chain. Thanks Emil --- drivers/pci/pci-sysfs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index bcd10c7..0666287 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -50,6 +50,7 @@ pci_config_attr(vendor, "0x%04x\n"); pci_config_attr(device, "0x%04x\n"); pci_config_attr(subsystem_vendor, "0x%04x\n"); pci_config_attr(subsystem_device, "0x%04x\n"); +pci_config_attr(revision, "0x%02x\n"); pci_config_attr(class, "0x%06x\n"); pci_config_attr(irq, "%u\n"); @@ -568,6 +569,7 @@ static struct attribute *pci_dev_attrs[] = { &dev_attr_device.attr, &dev_attr_subsystem_vendor.attr, &dev_attr_subsystem_device.attr, + &dev_attr_revision.attr, &dev_attr_class.attr, &dev_attr_irq.attr, &dev_attr_local_cpus.attr, -- 2.9.3
