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    Subject[PATCH] PCI: Method for removing PCI devices
    Date
    This patch adds an attribute named "remove" to a PCI device's sysfs
    directory. Writing a non-zero value to this attribute will remove the PCI
    device and any children of it.
    ---
    drivers/pci/pci-sysfs.c | 26 ++++++++++++++++++++++++++
    1 files changed, 26 insertions(+), 0 deletions(-)

    diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
    index 9a5bdc0..fe0f6a9 100644
    --- a/drivers/pci/pci-sysfs.c
    +++ b/drivers/pci/pci-sysfs.c
    @@ -217,6 +217,31 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
    return count;
    }

    +static void remove_callback(void *data)
    +{
    + pci_remove_bus_device((struct pci_dev *)data);
    +}
    +
    +static ssize_t
    +remove_store(struct device *dev, struct device_attribute *dummy,
    + const char *buf, size_t count)
    +{
    + struct pci_dev *pdev = to_pci_dev(dev);
    + unsigned long val;
    +
    + if (strict_strtoul(buf, 0, &val) < 0)
    + return -EINVAL;
    +
    + if (!capable(CAP_SYS_ADMIN))
    + return -EPERM;
    +
    + if (val)
    + sysfs_schedule_callback(&dev->kobj, remove_callback, pdev,
    + THIS_MODULE);
    +
    + return count;
    +}
    +
    struct device_attribute pci_dev_attrs[] = {
    __ATTR_RO(resource),
    __ATTR_RO(vendor),
    @@ -235,6 +260,7 @@ struct device_attribute pci_dev_attrs[] = {
    __ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
    broken_parity_status_show,broken_parity_status_store),
    __ATTR(msi_bus, 0644, msi_bus_show, msi_bus_store),
    + __ATTR(remove, S_IWUSR, NULL, remove_store),
    __ATTR_NULL,
    };

    --
    1.5.4.1


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