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, 21 insertions, 9 deletions

diff --git a/drivers/pcmcia/tcic.c b/drivers/pcmcia/tcic.c
index 2a613e920fd4..9ad97ea836e8 100644
--- a/drivers/pcmcia/tcic.c
+++ b/drivers/pcmcia/tcic.c
@@ -363,13 +363,25 @@ static int __init get_tcic_id(void)
     return id;
 }
 
+static int tcic_drv_pcmcia_suspend(struct platform_device *dev,
+                                     pm_message_t state)
+{
+        return pcmcia_socket_dev_suspend(&dev->dev, state);
+}
+
+static int tcic_drv_pcmcia_resume(struct platform_device *dev)
+{
+        return pcmcia_socket_dev_resume(&dev->dev);
+}
 /*====================================================================*/
 
-static struct device_driver tcic_driver = {
-        .name = "tcic-pcmcia",
-        .bus = &platform_bus_type,
-        .suspend = pcmcia_socket_dev_suspend,
-        .resume = pcmcia_socket_dev_resume,
+static struct platform_driver tcic_driver = {
+        .driver = {
+                .name = "tcic-pcmcia",
+                .owner          = THIS_MODULE,
+        },
+        .suspend        = tcic_drv_pcmcia_suspend,
+        .resume         = tcic_drv_pcmcia_resume,
 };
 
 static struct platform_device tcic_device = {
@@ -383,7 +395,7 @@ static int __init init_tcic(void)
     int i, sock, ret = 0;
     u_int mask, scan;
 
-    if (driver_register(&tcic_driver))
+    if (platform_driver_register(&tcic_driver))
         return -1;
     
     printk(KERN_INFO "Databook TCIC-2 PCMCIA probe: ");
@@ -391,7 +403,7 @@ static int __init init_tcic(void)
 
     if (!request_region(tcic_base, 16, "tcic-2")) {
         printk("could not allocate ports,\n ");
-        driver_unregister(&tcic_driver);
+        platform_driver_unregister(&tcic_driver);
         return -ENODEV;
     }
     else {
@@ -414,7 +426,7 @@ static int __init init_tcic(void)
     if (sock == 0) {
         printk("not found.\n");
         release_region(tcic_base, 16);
-        driver_unregister(&tcic_driver);
+        platform_driver_unregister(&tcic_driver);
         return -ENODEV;
     }
 
@@ -542,7 +554,7 @@ static void __exit exit_tcic(void)
     }
 
     platform_device_unregister(&tcic_device);
-    driver_unregister(&tcic_driver);
+    platform_driver_unregister(&tcic_driver);
 } /* exit_tcic */
 
 /*====================================================================*/