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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-11-05 21:22:13 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-05 21:22:13 +0000
commitabbf268ae8f51e19779cdf3f5fbb8144f1a5fbc3 (patch)
tree735185fb11797c7afdc885267f84a19337693897
parent8d972a962177a261fc894f767fa3014f63d661e9 (diff)
[DRIVER MODEL] Fix gbefb
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>
-rw-r--r--drivers/video/gbefb.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c
index 316bfe99481..ed853bef19e 100644
--- a/drivers/video/gbefb.c
+++ b/drivers/video/gbefb.c
@@ -1260,24 +1260,30 @@ static struct device_driver gbefb_driver = {
.remove = __devexit_p(gbefb_remove),
};
-static struct platform_device gbefb_device = {
- .name = "gbefb",
-};
+static struct platform_device *gbefb_device;
int __init gbefb_init(void)
{
int ret = driver_register(&gbefb_driver);
if (!ret) {
- ret = platform_device_register(&gbefb_device);
- if (ret)
+ gbefb_device = platform_device_alloc("gbefb", 0);
+ if (gbefb_device) {
+ ret = platform_device_add(gbefb_device);
+ } else {
+ ret = -ENOMEM;
+ }
+ if (ret) {
+ platform_device_put(gbefb_device);
driver_unregister(&gbefb_driver);
+ }
}
return ret;
}
void __exit gbefb_exit(void)
{
- driver_unregister(&gbefb_driver);
+ platform_device_unregister(gbefb_device);
+ driver_unregister(&gbefb_driver);
}
module_init(gbefb_init);