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, 24 insertions, 10 deletions

diff --git a/drivers/pcmcia/vrc4171_card.c b/drivers/pcmcia/vrc4171_card.c
index b2c41241905..659421d0ca4 100644
--- a/drivers/pcmcia/vrc4171_card.c
+++ b/drivers/pcmcia/vrc4171_card.c
@@ -704,24 +704,37 @@ static int __devinit vrc4171_card_setup(char *options)
 
 __setup("vrc4171_card=", vrc4171_card_setup);
 
-static struct device_driver vrc4171_card_driver = {
-        .name           = vrc4171_card_name,
-        .bus            = &platform_bus_type,
-        .suspend        = pcmcia_socket_dev_suspend,
-        .resume         = pcmcia_socket_dev_resume,
+static int vrc4171_card_suspend(struct platform_device *dev,
+                                     pm_message_t state)
+{
+        return pcmcia_socket_dev_suspend(&dev->dev, state);
+}
+
+static int vrc4171_card_resume(struct platform_device *dev)
+{
+        return pcmcia_socket_dev_resume(&dev->dev);
+}
+
+static struct platform_driver vrc4171_card_driver = {
+        .driver = {
+                .name           = vrc4171_card_name,
+                .owner          = THIS_MODULE,
+        },
+        .suspend        = vrc4171_card_suspend,
+        .resume         = vrc4171_card_resume,
 };
 
 static int __devinit vrc4171_card_init(void)
 {
         int retval;
 
-        retval = driver_register(&vrc4171_card_driver);
+        retval = platform_driver_register(&vrc4171_card_driver);
         if (retval < 0)
                 return retval;
 
         retval = platform_device_register(&vrc4171_card_device);
         if (retval < 0) {
-                driver_unregister(&vrc4171_card_driver);
+                platform_driver_unregister(&vrc4171_card_driver);
                 return retval;
         }
 
@@ -735,11 +748,12 @@ static int __devinit vrc4171_card_init(void)
         if (retval < 0) {
                 vrc4171_remove_sockets();
                 platform_device_unregister(&vrc4171_card_device);
-                driver_unregister(&vrc4171_card_driver);
+                platform_driver_unregister(&vrc4171_card_driver);
                 return retval;
         }
 
-        printk(KERN_INFO "%s, connected to IRQ %d\n", vrc4171_card_driver.name, vrc4171_irq);
+        printk(KERN_INFO "%s, connected to IRQ %d\n",
+                vrc4171_card_driver.driver.name, vrc4171_irq);
 
         return 0;
 }
@@ -749,7 +763,7 @@ static void __devexit vrc4171_card_exit(void)
         free_irq(vrc4171_irq, vrc4171_sockets);
         vrc4171_remove_sockets();
         platform_device_unregister(&vrc4171_card_device);
-        driver_unregister(&vrc4171_card_driver);
+        platform_driver_unregister(&vrc4171_card_driver);
 }
 
 module_init(vrc4171_card_init);