Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes...

[pandora-kernel.git] / drivers / pci / pci-driver.c

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 267de88..c0cbbb5 100644 (file)
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -99,6 +99,52 @@ store_new_id(struct device_driver *driver, const char *buf, size_t count)
 }
 static DRIVER_ATTR(new_id, S_IWUSR, NULL, store_new_id);
 
+/**
+ * store_remove_id - remove a PCI device ID from this driver
+ * @driver: target device driver
+ * @buf: buffer for scanning device ID data
+ * @count: input size
+ *
+ * Removes a dynamic pci device ID to this driver.
+ */
+static ssize_t
+store_remove_id(struct device_driver *driver, const char *buf, size_t count)
+{
+       struct pci_dynid *dynid, *n;
+       struct pci_driver *pdrv = to_pci_driver(driver);
+       __u32 vendor, device, subvendor = PCI_ANY_ID,
+               subdevice = PCI_ANY_ID, class = 0, class_mask = 0;
+       int fields = 0;
+       int retval = -ENODEV;
+
+       fields = sscanf(buf, "%x %x %x %x %x %x",
+                       &vendor, &device, &subvendor, &subdevice,
+                       &class, &class_mask);
+       if (fields < 2)
+               return -EINVAL;
+
+       spin_lock(&pdrv->dynids.lock);
+       list_for_each_entry_safe(dynid, n, &pdrv->dynids.list, node) {
+               struct pci_device_id *id = &dynid->id;
+               if ((id->vendor == vendor) &&
+                   (id->device == device) &&
+                   (subvendor == PCI_ANY_ID || id->subvendor == subvendor) &&
+                   (subdevice == PCI_ANY_ID || id->subdevice == subdevice) &&
+                   !((id->class ^ class) & class_mask)) {
+                       list_del(&dynid->node);
+                       kfree(dynid);
+                       retval = 0;
+                       break;
+               }
+       }
+       spin_unlock(&pdrv->dynids.lock);
+
+       if (retval)
+               return retval;
+       return count;
+}
+static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
+
 static void
 pci_free_dynids(struct pci_driver *drv)
 {
@@ -125,6 +171,20 @@ static void pci_remove_newid_file(struct pci_driver *drv)
 {
        driver_remove_file(&drv->driver, &driver_attr_new_id);
 }
+
+static int
+pci_create_removeid_file(struct pci_driver *drv)
+{
+       int error = 0;
+       if (drv->probe != NULL)
+               error = driver_create_file(&drv->driver,&driver_attr_remove_id);
+       return error;
+}
+
+static void pci_remove_removeid_file(struct pci_driver *drv)
+{
+       driver_remove_file(&drv->driver, &driver_attr_remove_id);
+}
 #else /* !CONFIG_HOTPLUG */
 static inline void pci_free_dynids(struct pci_driver *drv) {}
 static inline int pci_create_newid_file(struct pci_driver *drv)
@@ -132,6 +192,11 @@ static inline int pci_create_newid_file(struct pci_driver *drv)
        return 0;
 }
 static inline void pci_remove_newid_file(struct pci_driver *drv) {}
+static inline int pci_create_removeid_file(struct pci_driver *drv)
+{
+       return 0;
+}
+static inline void pci_remove_removeid_file(struct pci_driver *drv) {}
 #endif
 
 /**
@@ -899,13 +964,23 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
        /* register with core */
        error = driver_register(&drv->driver);
        if (error)
-               return error;
+               goto out;
 
        error = pci_create_newid_file(drv);
        if (error)
-               driver_unregister(&drv->driver);
+               goto out_newid;
 
+       error = pci_create_removeid_file(drv);
+       if (error)
+               goto out_removeid;
+out:
        return error;
+
+out_removeid:
+       pci_remove_newid_file(drv);
+out_newid:
+       driver_unregister(&drv->driver);
+       goto out;
 }
 
 /**
@@ -921,6 +996,7 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
 void
 pci_unregister_driver(struct pci_driver *drv)
 {
+       pci_remove_removeid_file(drv);
        pci_remove_newid_file(drv);
        driver_unregister(&drv->driver);
        pci_free_dynids(drv);
@@ -1020,6 +1096,7 @@ struct bus_type pci_bus_type = {
        .remove         = pci_device_remove,
        .shutdown       = pci_device_shutdown,
        .dev_attrs      = pci_dev_attrs,
+       .bus_attrs      = pci_bus_attrs,
        .pm             = PCI_PM_OPS_PTR,
 };