Pull acpi_bus_register_driver into release branch

[pandora-kernel.git] / drivers / acpi / asus_acpi.c

diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c
index 216c072..90eb3c5 100644 (file)
--- a/drivers/acpi/asus_acpi.c
+++ b/drivers/acpi/asus_acpi.c
@@ -817,7 +817,7 @@ typedef int (proc_writefunc) (struct file * file, const char __user * buffer,
                              unsigned long count, void *data);
 
 static int
-__init asus_proc_add(char *name, proc_writefunc * writefunc,
+asus_proc_add(char *name, proc_writefunc * writefunc,
                     proc_readfunc * readfunc, mode_t mode,
                     struct acpi_device *device)
 {
@@ -836,7 +836,7 @@ __init asus_proc_add(char *name, proc_writefunc * writefunc,
        return 0;
 }
 
-static int __init asus_hotk_add_fs(struct acpi_device *device)
+static int asus_hotk_add_fs(struct acpi_device *device)
 {
        struct proc_dir_entry *proc;
        mode_t mode;
@@ -954,7 +954,7 @@ static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
  * This function is used to initialize the hotk with right values. In this
  * method, we can make all the detection we want, and modify the hotk struct
  */
-static int __init asus_hotk_get_info(void)
+static int asus_hotk_get_info(void)
 {
        struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
        struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -1101,7 +1101,7 @@ static int __init asus_hotk_get_info(void)
        return AE_OK;
 }
 
-static int __init asus_hotk_check(void)
+static int asus_hotk_check(void)
 {
        int result = 0;
 
@@ -1119,7 +1119,9 @@ static int __init asus_hotk_check(void)
        return result;
 }
 
-static int __init asus_hotk_add(struct acpi_device *device)
+static int asus_hotk_found;
+
+static int asus_hotk_add(struct acpi_device *device)
 {
        acpi_status status = AE_OK;
        int result;
@@ -1180,6 +1182,8 @@ static int __init asus_hotk_add(struct acpi_device *device)
                }
        }
 
+       asus_hotk_found = 1;
+
       end:
        if (result) {
                kfree(hotk);
@@ -1226,7 +1230,19 @@ static int __init asus_acpi_init(void)
        asus_proc_dir->owner = THIS_MODULE;
 
        result = acpi_bus_register_driver(&asus_hotk_driver);
-       if (result < 1) {
+       if (result < 0) {
+               remove_proc_entry(PROC_ASUS, acpi_root_dir);
+               return -ENODEV;
+       }
+
+       /*
+        * This is a bit of a kludge.  We only want this module loaded
+        * for ASUS systems, but there's currently no way to probe the
+        * ACPI namespace for ASUS HIDs.  So we just return failure if
+        * we didn't find one, which will cause the module to be
+        * unloaded.
+        */
+       if (!asus_hotk_found) {
                acpi_bus_unregister_driver(&asus_hotk_driver);
                remove_proc_entry(PROC_ASUS, acpi_root_dir);
                return -ENODEV;