Commit cfa3fa40 authored by Zhaolei's avatar Zhaolei Committed by John W. Linville
Browse files

Fix debugfs_create_*'s error checking method for wireless/rt2x00/



debugfs_create_*() returns NULL if an error occurs, returns -ENODEV
when debugfs is not enabled in the kernel.
Signed-off-by: default avatarZhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: default avatarIvo van Doorn <IvDoorn@gmail.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 9b24001d
......@@ -587,29 +587,29 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
intf->driver_folder =
debugfs_create_dir(intf->rt2x00dev->ops->name,
rt2x00dev->hw->wiphy->debugfsdir);
if (IS_ERR(intf->driver_folder))
if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
goto exit;
intf->driver_entry =
rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob);
if (IS_ERR(intf->driver_entry))
if (IS_ERR(intf->driver_entry) || !intf->driver_entry)
goto exit;
intf->chipset_entry =
rt2x00debug_create_file_chipset("chipset",
intf, &intf->chipset_blob);
if (IS_ERR(intf->chipset_entry))
if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
goto exit;
intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
intf->driver_folder, intf,
&rt2x00debug_fop_dev_flags);
if (IS_ERR(intf->dev_flags))
if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
goto exit;
intf->register_folder =
debugfs_create_dir("register", intf->driver_folder);
if (IS_ERR(intf->register_folder))
if (IS_ERR(intf->register_folder) || !intf->register_folder)
goto exit;
#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
......@@ -619,7 +619,8 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
S_IRUSR | S_IWUSR, \
(__intf)->register_folder, \
&(__intf)->offset_##__name); \
if (IS_ERR((__intf)->__name##_off_entry)) \
if (IS_ERR((__intf)->__name##_off_entry) \
|| !(__intf)->__name##_off_entry) \
goto exit; \
\
(__intf)->__name##_val_entry = \
......@@ -627,7 +628,8 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
S_IRUSR | S_IWUSR, \
(__intf)->register_folder, \
(__intf), &rt2x00debug_fop_##__name);\
if (IS_ERR((__intf)->__name##_val_entry)) \
if (IS_ERR((__intf)->__name##_val_entry) \
|| !(__intf)->__name##_val_entry) \
goto exit; \
})
......@@ -640,13 +642,14 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
intf->queue_folder =
debugfs_create_dir("queue", intf->driver_folder);
if (IS_ERR(intf->queue_folder))
if (IS_ERR(intf->queue_folder) || !intf->queue_folder)
goto exit;
intf->queue_frame_dump_entry =
debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
intf, &rt2x00debug_fop_queue_dump);
if (IS_ERR(intf->queue_frame_dump_entry))
if (IS_ERR(intf->queue_frame_dump_entry)
|| !intf->queue_frame_dump_entry)
goto exit;
skb_queue_head_init(&intf->frame_dump_skbqueue);
......
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