firewire: Switch cdev code over to use register_chrdev and keep a list of devices.

The old mechanism kept a struct cdev for each fw device, but fops->release
would reference this struct after the device got freed in some cases.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 8e2b94557390..3052698c13a6 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -761,6 +761,12 @@ static int __init fw_core_init(void)
         if (retval < 0)
                 return retval;
 
+        fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
+        if (fw_cdev_major < 0) {
+                bus_unregister(&fw_bus_type);
+                return fw_cdev_major;
+        }
+
         /* Add the vendor textual descriptor. */
         retval = fw_core_add_descriptor(&vendor_id_descriptor);
         BUG_ON(retval < 0);
@@ -772,6 +778,7 @@ static int __init fw_core_init(void)
 
 static void __exit fw_core_cleanup(void)
 {
+        unregister_chrdev(fw_cdev_major, "firewire");
         bus_unregister(&fw_bus_type);
 }