[POWERPC] Fix windfarm platform device usage

The windfarm code uses a struct device_driver instead of
platform_driver, which can cause crashes if any of the callbacks are
called (like on module removal). This fixes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 10 insertions, 14 deletions

diff --git a/drivers/macintosh/windfarm_pm81.c b/drivers/macintosh/windfarm_pm81.c
index 2ff546e4c92f..2a944851b8e1 100644
--- a/drivers/macintosh/windfarm_pm81.c
+++ b/drivers/macintosh/windfarm_pm81.c
@@ -131,8 +131,6 @@
 
 static int wf_smu_mach_model;   /* machine model id */
 
-static struct device *wf_smu_dev;
-
 /* Controls & sensors */
 static struct wf_sensor *sensor_cpu_power;
 static struct wf_sensor *sensor_cpu_temp;
@@ -717,16 +715,14 @@ static int wf_init_pm(void)
         return 0;
 }
 
-static int wf_smu_probe(struct device *ddev)
+static int wf_smu_probe(struct platform_device *ddev)
 {
-        wf_smu_dev = ddev;
-
         wf_register_client(&wf_smu_events);
 
         return 0;
 }
 
-static int wf_smu_remove(struct device *ddev)
+static int __devexit wf_smu_remove(struct platform_device *ddev)
 {
         wf_unregister_client(&wf_smu_events);
 
@@ -766,16 +762,16 @@ static int wf_smu_remove(struct device *ddev)
         if (wf_smu_cpu_fans)
                 kfree(wf_smu_cpu_fans);
 
-        wf_smu_dev = NULL;
-
         return 0;
 }
 
-static struct device_driver wf_smu_driver = {
-        .name = "windfarm",
-        .bus = &platform_bus_type,
+static struct platform_driver wf_smu_driver = {
         .probe = wf_smu_probe,
-        .remove = wf_smu_remove,
+        .remove = __devexit_p(wf_smu_remove),
+        .driver = {
+                .name = "windfarm",
+                .bus = &platform_bus_type,
+        },
 };
 
 
@@ -794,7 +790,7 @@ static int __init wf_smu_init(void)
                 request_module("windfarm_lm75_sensor");
 
 #endif /* MODULE */
-                driver_register(&wf_smu_driver);
+                platform_driver_register(&wf_smu_driver);
         }
 
         return rc;
@@ -803,7 +799,7 @@ static int __init wf_smu_init(void)
 static void __exit wf_smu_exit(void)
 {
 
-        driver_unregister(&wf_smu_driver);
+        platform_driver_unregister(&wf_smu_driver);
 }