From: Zhaolei <zhaolei@cn.fujitsu.com>
Date: Wed, 22 Oct 2008 09:06:12 +0000 (+0800)
Subject: Fix debugfs_create_bool's error checking method for wireless/iwlwifi/
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9b24001db145cf1da76a479918373c18aa10bb4b;p=openwrt%2Fstaging%2Fblogic.git

Fix debugfs_create_bool's error checking method for wireless/iwlwifi/

debugfs_create_bool() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/iwlwifi/iwl-debugfs.c b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
index 753f9387aa68..c3df5aa8df91 100644
--- a/drivers/net/wireless/iwlwifi/iwl-debugfs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-debugfs.c
@@ -58,7 +58,8 @@
 #define DEBUGFS_ADD_BOOL(name, parent, ptr) do {                        \
 	dbgfs->dbgfs_##parent##_files.file_##name =                     \
 	debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr);     \
-	if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name))          \
+	if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name)		\
+			|| !dbgfs->dbgfs_##parent##_files.file_##name)	\
 		goto err;                                               \
 } while (0)