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authorMing Lei <tom.leiming@gmail.com>2009-02-06 18:40:12 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-25 02:38:25 +0300
commit7a192ec334cab9fafe3a8665a65af398b0e24730 (patch)
treeeea572863500f94d446cfded69835e188dba3447 /drivers/pcmcia/au1000_generic.c
parent6da2d377bba06c29d0bc41c8dee014164dec82a7 (diff)
downloadlinux-7a192ec334cab9fafe3a8665a65af398b0e24730.tar.xz
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/au1000_generic.c')
-rw-r--r--drivers/pcmcia/au1000_generic.c37
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);