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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-05 21:22:39 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-05 21:22:39 +0000
commit2c119aa8091a15a87920f09aa0f17e05960fe11b (patch)
tree28871ec8da0830362f045906fb2b97722cb6837f /drivers
parentabbf268ae8f51e19779cdf3f5fbb8144f1a5fbc3 (diff)
[DRIVER MODEL] Fix sgivwfb
Statically allocated devices in module data is a potential cause of oopsen. The device may be in use by a userspace process, which will keep a reference to the device. If the module is unloaded, the module data will be freed. Subsequent use of the platform device will cause a kernel oops. Use generic platform device allocation/release code in modules. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/video/sgivwfb.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/drivers/video/sgivwfb.c b/drivers/video/sgivwfb.c
index cf5106eab2d..5ce81f44c76 100644
--- a/drivers/video/sgivwfb.c
+++ b/drivers/video/sgivwfb.c
@@ -751,10 +751,6 @@ int __init sgivwfb_setup(char *options)
/*
* Initialisation
*/
-static void sgivwfb_release(struct device *device)
-{
-}
-
static int __init sgivwfb_probe(struct device *device)
{
struct platform_device *dev = to_platform_device(device);
@@ -859,13 +855,7 @@ static struct device_driver sgivwfb_driver = {
.remove = sgivwfb_remove,
};
-static struct platform_device sgivwfb_device = {
- .name = "sgivwfb",
- .id = 0,
- .dev = {
- .release = sgivwfb_release,
- }
-};
+static struct platform_device *sgivwfb_device;
int __init sgivwfb_init(void)
{
@@ -880,9 +870,15 @@ int __init sgivwfb_init(void)
#endif
ret = driver_register(&sgivwfb_driver);
if (!ret) {
- ret = platform_device_register(&sgivwfb_device);
- if (ret)
+ sgivwfb_device = platform_device_alloc("sgivwfb", 0);
+ if (sgivwfb_device) {
+ ret = platform_device_add(sgivwfb_device);
+ } else
+ ret = -ENOMEM;
+ if (ret) {
driver_unregister(&sgivwfb_driver);
+ platform_device_put(sgivwfb_device);
+ }
}
return ret;
}
@@ -894,7 +890,7 @@ MODULE_LICENSE("GPL");
static void __exit sgivwfb_exit(void)
{
- platform_device_unregister(&sgivwfb_device);
+ platform_device_unregister(sgivwfb_device);
driver_unregister(&sgivwfb_driver);
}