[PATCH] PCI: add modalias sysfs file for pci devices

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 8568b207f189..6ca0061137a6 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -73,6 +73,17 @@ resource_show(struct device * dev, char * buf)
         return (str - buf);
 }
 
+static ssize_t modalias_show(struct device *dev, char *buf)
+{
+        struct pci_dev *pci_dev = to_pci_dev(dev);
+
+        return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
+                       pci_dev->vendor, pci_dev->device,
+                       pci_dev->subsystem_vendor, pci_dev->subsystem_device,
+                       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
+                       (u8)(pci_dev->class));
+}
+
 struct device_attribute pci_dev_attrs[] = {
         __ATTR_RO(resource),
         __ATTR_RO(vendor),
@@ -82,6 +93,7 @@ struct device_attribute pci_dev_attrs[] = {
         __ATTR_RO(class),
         __ATTR_RO(irq),
         __ATTR_RO(local_cpus),
+        __ATTR_RO(modalias),
         __ATTR_NULL,
 };