From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sat, 5 Nov 2005 21:22:13 +0000 (+0000)
Subject: [DRIVER MODEL] Fix gbefb
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=abbf268ae8f51e19779cdf3f5fbb8144f1a5fbc3;p=openwrt%2Fstaging%2Fblogic.git

[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>
---

diff --git a/drivers/video/gbefb.c b/drivers/video/gbefb.c
index 316bfe994811..ed853bef19e9 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);