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

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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>
This commit is contained in:
Zhaolei 2008-10-22 17:06:12 +08:00 committed by John W. Linville
parent ac9440a4e4
commit 9b24001db1
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/iwlwifi/iwl-debugfs.c
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@ -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)