diff options
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 56ac2bc003c..37897a8c95e 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, }; |