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-rw-r--r--drivers/pci/pci-sysfs.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 56ac2bc003c7..37897a8c95e0 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -43,6 +43,7 @@ pci_config_attr(subsystem_vendor, "0x%04x\n");
pci_config_attr(subsystem_device, "0x%04x\n");
pci_config_attr(class, "0x%06x\n");
pci_config_attr(irq, "%u\n");
+pci_config_attr(is_enabled, "%u\n");
static ssize_t local_cpus_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -90,6 +91,25 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
(u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
(u8)(pci_dev->class));
}
+static ssize_t
+is_enabled_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+
+ /* this can crash the machine when done on the "wrong" device */
+ if (!capable(CAP_SYS_ADMIN))
+ return count;
+
+ if (*buf == '0')
+ pci_disable_device(pdev);
+
+ if (*buf == '1')
+ pci_enable_device(pdev);
+
+ return count;
+}
+
struct device_attribute pci_dev_attrs[] = {
__ATTR_RO(resource),
@@ -101,6 +121,7 @@ struct device_attribute pci_dev_attrs[] = {
__ATTR_RO(irq),
__ATTR_RO(local_cpus),
__ATTR_RO(modalias),
+ __ATTR(enable, 0600, is_enabled_show, is_enabled_store),
__ATTR_NULL,
};