linux-kernel - [PATCH] firmware: gsmi: remove sysfs entries when unload the module

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Message-ID: <1309334273.6368.1.camel@phoenix>
Date:	Wed, 29 Jun 2011 15:57:53 +0800
From:	Axel Lin <axel.lin@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Mike Waychison <mikew@...gle.com>,
	Duncan Laurie <dlaurie@...gle.com>,
	Aaron Durbin <adurbin@...gle.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH] firmware: gsmi: remove sysfs entries when unload the module

This patch removes sysfs entries in gsmi_exit() and gsmi_init() error path.

Also move the driver successfully loaded message to the end of gsmi_init()
and return proper error if register_efivars() fails.

Signed-off-by: Axel Lin <axel.lin@...il.com>
---
 drivers/firmware/google/gsmi.c |   19 +++++++++++++------
 1 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/firmware/google/gsmi.c b/drivers/firmware/google/gsmi.c
index fa7f0b3..68810fd 100644
--- a/drivers/firmware/google/gsmi.c
+++ b/drivers/firmware/google/gsmi.c
@@ -869,8 +869,6 @@ static __init int gsmi_init(void)
 		goto out_err;
 	}
 
-	printk(KERN_INFO "gsmi version " DRIVER_VERSION " loaded\n");
-
 	/* Register in the firmware directory */
 	ret = -ENOMEM;
 	gsmi_kobj = kobject_create_and_add("gsmi", firmware_kobj);
@@ -890,12 +888,13 @@ static __init int gsmi_init(void)
 	ret = sysfs_create_files(gsmi_kobj, gsmi_attrs);
 	if (ret) {
 		printk(KERN_INFO "gsmi: Failed to add attrs");
-		goto out_err;
+		goto out_remove_bin_file;
 	}
 
-	if (register_efivars(&efivars, &efivar_ops, gsmi_kobj)) {
+	ret = register_efivars(&efivars, &efivar_ops, gsmi_kobj);
+	if (ret) {
 		printk(KERN_INFO "gsmi: Failed to register efivars\n");
-		goto out_err;
+		goto out_remove_sysfs_files;
 	}
 
 	register_reboot_notifier(&gsmi_reboot_notifier);
@@ -903,9 +902,15 @@ static __init int gsmi_init(void)
 	atomic_notifier_chain_register(&panic_notifier_list,
 				       &gsmi_panic_notifier);
 
+	printk(KERN_INFO "gsmi version " DRIVER_VERSION " loaded\n");
+
 	return 0;
 
- out_err:
+out_remove_sysfs_files:
+	sysfs_remove_files(gsmi_kobj, gsmi_attrs);
+out_remove_bin_file:
+	sysfs_remove_bin_file(gsmi_kobj, &eventlog_bin_attr);
+out_err:
 	kobject_put(gsmi_kobj);
 	gsmi_buf_free(gsmi_dev.param_buf);
 	gsmi_buf_free(gsmi_dev.data_buf);
@@ -925,6 +930,8 @@ static void __exit gsmi_exit(void)
 					 &gsmi_panic_notifier);
 	unregister_efivars(&efivars);
 
+	sysfs_remove_files(gsmi_kobj, gsmi_attrs);
+	sysfs_remove_bin_file(gsmi_kobj, &eventlog_bin_attr);
 	kobject_put(gsmi_kobj);
 	gsmi_buf_free(gsmi_dev.param_buf);
 	gsmi_buf_free(gsmi_dev.data_buf);
-- 
1.7.4.1



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