firewire: Implement deallocation of address ranges.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-device-cdev.c b/drivers/firewire/fw-device-cdev.c
index 175ea04..ebf0d1008 100644
--- a/drivers/firewire/fw-device-cdev.c
+++ b/drivers/firewire/fw-device-cdev.c
@@ -467,6 +467,32 @@
return 0;
}
+static int ioctl_deallocate(struct client *client, void __user *arg)
+{
+ struct fw_cdev_deallocate request;
+ struct address_handler *handler;
+ unsigned long flags;
+
+ if (copy_from_user(&request, arg, sizeof request))
+ return -EFAULT;
+
+ spin_lock_irqsave(&client->lock, flags);
+ list_for_each_entry(handler, &client->handler_list, link) {
+ if (handler->handler.offset == request.offset) {
+ list_del(&handler->link);
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&client->lock, flags);
+
+ if (&handler->link == &client->handler_list)
+ return -EINVAL;
+
+ fw_core_remove_address_handler(&handler->handler);
+
+ return 0;
+}
+
static int ioctl_send_response(struct client *client, void __user *arg)
{
struct fw_cdev_send_response request;
@@ -696,6 +722,8 @@
return ioctl_send_request(client, arg);
case FW_CDEV_IOC_ALLOCATE:
return ioctl_allocate(client, arg);
+ case FW_CDEV_IOC_DEALLOCATE:
+ return ioctl_deallocate(client, arg);
case FW_CDEV_IOC_SEND_RESPONSE:
return ioctl_send_response(client, arg);
case FW_CDEV_IOC_INITIATE_BUS_RESET:
