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>
diff --git a/drivers/pcmcia/tcic.c b/drivers/pcmcia/tcic.c
index 2a613e9..9ad97ea 100644
--- a/drivers/pcmcia/tcic.c
+++ b/drivers/pcmcia/tcic.c
@@ -363,13 +363,25 @@
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 @@
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 @@
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 @@
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 @@
}
platform_device_unregister(&tcic_device);
- driver_unregister(&tcic_driver);
+ platform_driver_unregister(&tcic_driver);
} /* exit_tcic */
/*====================================================================*/