1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index be7468a5eb72..e16990ecc024 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -243,6 +243,39 @@ struct bus_attribute pci_bus_attrs[] = {
         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, bus_rescan_store),
         __ATTR_NULL
 };
+
+static void remove_callback(struct device *dev)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+
+        mutex_lock(&pci_remove_rescan_mutex);
+        pci_remove_bus_device(pdev);
+        mutex_unlock(&pci_remove_rescan_mutex);
+}
+
+static ssize_t
+remove_store(struct device *dev, struct device_attribute *dummy,
+             const char *buf, size_t count)
+{
+        int ret = 0;
+        unsigned long val;
+        struct pci_dev *pdev = to_pci_dev(dev);
+
+        if (strict_strtoul(buf, 0, &val) < 0)
+                return -EINVAL;
+
+        if (pci_is_root_bus(pdev->bus))
+                return -EBUSY;
+
+        /* An attribute cannot be unregistered by one of its own methods,
+         * so we have to use this roundabout approach.
+         */
+        if (val)
+                ret = device_schedule_callback(dev, remove_callback);
+        if (ret)
+                count = ret;
+        return count;
+}
 #endif
 
 struct device_attribute pci_dev_attrs[] = {
@@ -263,6 +296,9 @@ 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),
+#ifdef CONFIG_HOTPLUG
+        __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
+#endif
         __ATTR_NULL,
 };