platform driver: fix incorrect use of 'platform_bus_type' with 'struct device_driver'

This patch fixes the bug reported in
	http://bugzilla.kernel.org/show_bug.cgi?id=11681.

"Lots of device drivers register a 'struct device_driver' with
the '.bus' member set to '&platform_bus_type'. This is wrong,
since the platform_bus functions expect the 'struct device_driver'
to be wrapped up in a 'struct platform_driver' which provides
some additional callbacks (like suspend_late, resume_early).
The effect may be that platform_suspend_late() uses bogus data
outside the device_driver struct as a pointer pointer to the
device driver's suspend_late() function or other hard to
reproduce failures."(Lothar Wassmann)

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 20 insertions, 8 deletions

diff --git a/drivers/pcmcia/i82365.c b/drivers/pcmcia/i82365.c
index 71653ab84890..40d4953e4b12 100644
--- a/drivers/pcmcia/i82365.c
+++ b/drivers/pcmcia/i82365.c
@@ -1238,6 +1238,16 @@ static int pcic_init(struct pcmcia_socket *s)
         return 0;
 }
 
+static int i82365_drv_pcmcia_suspend(struct platform_device *dev,
+                                     pm_message_t state)
+{
+        return pcmcia_socket_dev_suspend(&dev->dev, state);
+}
+
+static int i82365_drv_pcmcia_resume(struct platform_device *dev)
+{
+        return pcmcia_socket_dev_resume(&dev->dev);
+}
 static struct pccard_operations pcic_operations = {
         .init                   = pcic_init,
         .get_status             = pcic_get_status,
@@ -1248,11 +1258,13 @@ static struct pccard_operations pcic_operations = {
 
 /*====================================================================*/
 
-static struct device_driver i82365_driver = {
-        .name = "i82365",
-        .bus = &platform_bus_type,
-        .suspend = pcmcia_socket_dev_suspend,
-        .resume = pcmcia_socket_dev_resume,
+static struct platform_driver i82365_driver = {
+        .driver = {
+                .name = "i82365",
+                .owner          = THIS_MODULE,
+        },
+        .suspend        = i82365_drv_pcmcia_suspend,
+        .resume         = i82365_drv_pcmcia_resume,
 };
 
 static struct platform_device *i82365_device;
@@ -1261,7 +1273,7 @@ static int __init init_i82365(void)
 {
     int i, ret;
 
-    ret = driver_register(&i82365_driver);
+    ret = platform_driver_register(&i82365_driver);
     if (ret)
         goto err_out;
 
@@ -1337,7 +1349,7 @@ err_dev_unregister:
         pnp_disable_dev(i82365_pnpdev);
 #endif
 err_driver_unregister:
-    driver_unregister(&i82365_driver);
+    platform_driver_unregister(&i82365_driver);
 err_out:
     return ret;
 } /* init_i82365 */
@@ -1365,7 +1377,7 @@ static void __exit exit_i82365(void)
     if (i82365_pnpdev)
                 pnp_disable_dev(i82365_pnpdev);
 #endif
-    driver_unregister(&i82365_driver);
+    platform_driver_unregister(&i82365_driver);
 } /* exit_i82365 */
 
 module_init(init_i82365);