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authorMing Lei <tom.leiming@gmail.com>2009-02-06 16:40:12 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-25 00:38:25 +0100
commit7a192ec334cab9fafe3a8665a65af398b0e24730 (patch)
treeeea572863500f94d446cfded69835e188dba3447 /drivers/pcmcia/m32r_pcc.c
parentUIO: Take offset into account when determining number of pages that can be ma... (diff)
downloadlinux-7a192ec334cab9fafe3a8665a65af398b0e24730.tar.xz
linux-7a192ec334cab9fafe3a8665a65af398b0e24730.zip
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>
Diffstat (limited to 'drivers/pcmcia/m32r_pcc.c')
-rw-r--r--drivers/pcmcia/m32r_pcc.c30
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/pcmcia/m32r_pcc.c b/drivers/pcmcia/m32r_pcc.c
index 2f108c23dbd9..12034b41d196 100644
--- a/drivers/pcmcia/m32r_pcc.c
+++ b/drivers/pcmcia/m32r_pcc.c
@@ -672,13 +672,25 @@ static struct pccard_operations pcc_operations = {
.set_mem_map = pcc_set_mem_map,
};
+static int pcc_drv_pcmcia_suspend(struct platform_device *dev,
+ pm_message_t state)
+{
+ return pcmcia_socket_dev_suspend(&dev->dev, state);
+}
+
+static int pcc_drv_pcmcia_resume(struct platform_device *dev)
+{
+ return pcmcia_socket_dev_resume(&dev->dev);
+}
/*====================================================================*/
-static struct device_driver pcc_driver = {
- .name = "pcc",
- .bus = &platform_bus_type,
- .suspend = pcmcia_socket_dev_suspend,
- .resume = pcmcia_socket_dev_resume,
+static struct platform_driver pcc_driver = {
+ .driver = {
+ .name = "pcc",
+ .owner = THIS_MODULE,
+ },
+ .suspend = pcc_drv_pcmcia_suspend,
+ .resume = pcc_drv_pcmcia_resume,
};
static struct platform_device pcc_device = {
@@ -692,13 +704,13 @@ static int __init init_m32r_pcc(void)
{
int i, ret;
- ret = driver_register(&pcc_driver);
+ ret = platform_driver_register(&pcc_driver);
if (ret)
return ret;
ret = platform_device_register(&pcc_device);
if (ret){
- driver_unregister(&pcc_driver);
+ platform_driver_unregister(&pcc_driver);
return ret;
}
@@ -715,7 +727,7 @@ static int __init init_m32r_pcc(void)
if (pcc_sockets == 0) {
printk("socket is not found.\n");
platform_device_unregister(&pcc_device);
- driver_unregister(&pcc_driver);
+ platform_driver_unregister(&pcc_driver);
return -ENODEV;
}
@@ -763,7 +775,7 @@ static void __exit exit_m32r_pcc(void)
if (poll_interval != 0)
del_timer_sync(&poll_timer);
- driver_unregister(&pcc_driver);
+ platform_driver_unregister(&pcc_driver);
} /* exit_m32r_pcc */
module_init(init_m32r_pcc);