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, 13 deletions

diff --git a/drivers/pcmcia/au1000_generic.c b/drivers/pcmcia/au1000_generic.c
index fc1de46fd20a..90013341cd5f 100644
--- a/drivers/pcmcia/au1000_generic.c
+++ b/drivers/pcmcia/au1000_generic.c
@@ -468,13 +468,13 @@ out:
         return ret;
 }
 
-int au1x00_drv_pcmcia_remove(struct device *dev)
+int au1x00_drv_pcmcia_remove(struct platform_device *dev)
 {
-        struct skt_dev_info *sinfo = dev_get_drvdata(dev);
+        struct skt_dev_info *sinfo = platform_get_drvdata(dev);
         int i;
 
         mutex_lock(&pcmcia_sockets_lock);
-        dev_set_drvdata(dev, NULL);
+        platform_set_drvdata(dev, NULL);
 
         for (i = 0; i < sinfo->nskt; i++) {
                 struct au1000_pcmcia_socket *skt = PCMCIA_SOCKET(i);
@@ -498,13 +498,13 @@ int au1x00_drv_pcmcia_remove(struct device *dev)
  * PCMCIA "Driver" API
  */
 
-static int au1x00_drv_pcmcia_probe(struct device *dev)
+static int au1x00_drv_pcmcia_probe(struct platform_device *dev)
 {
         int i, ret = -ENODEV;
 
         mutex_lock(&pcmcia_sockets_lock);
         for (i=0; i < ARRAY_SIZE(au1x00_pcmcia_hw_init); i++) {
-                ret = au1x00_pcmcia_hw_init[i](dev);
+                ret = au1x00_pcmcia_hw_init[i](&dev->dev);
                 if (ret == 0)
                         break;
         }
@@ -512,14 +512,26 @@ static int au1x00_drv_pcmcia_probe(struct device *dev)
         return ret;
 }
 
+static int au1x00_drv_pcmcia_suspend(struct platform_device *dev,
+                                     pm_message_t state)
+{
+        return pcmcia_socket_dev_suspend(&dev->dev, state);
+}
+
+static int au1x00_drv_pcmcia_resume(struct platform_device *dev)
+{
+        return pcmcia_socket_dev_resume(&dev->dev);
+}
 
-static struct device_driver au1x00_pcmcia_driver = {
+static struct platform_driver au1x00_pcmcia_driver = {
+        .driver = {
+                .name           = "au1x00-pcmcia",
+                .owner          = THIS_MODULE,
+        },
         .probe          = au1x00_drv_pcmcia_probe,
         .remove         = au1x00_drv_pcmcia_remove,
-        .name           = "au1x00-pcmcia",
-        .bus            = &platform_bus_type,
-        .suspend        = pcmcia_socket_dev_suspend,
-        .resume         = pcmcia_socket_dev_resume,
+        .suspend        = au1x00_drv_pcmcia_suspend,
+        .resume         = au1x00_drv_pcmcia_resume,
 };
 
 
@@ -533,8 +545,7 @@ static struct device_driver au1x00_pcmcia_driver = {
 static int __init au1x00_pcmcia_init(void)
 {
         int error = 0;
-        if ((error = driver_register(&au1x00_pcmcia_driver)))
-                return error;
+        error = platform_driver_register(&au1x00_pcmcia_driver);
         return error;
 }
 
@@ -544,7 +555,7 @@ static int __init au1x00_pcmcia_init(void)
  */
 static void __exit au1x00_pcmcia_exit(void)
 {
-        driver_unregister(&au1x00_pcmcia_driver);
+        platform_driver_unregister(&au1x00_pcmcia_driver);
 }
 
 module_init(au1x00_pcmcia_init);