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

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debugfs_create_*() 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: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Zhaolei 2008-10-22 17:07:25 +08:00 • committed by John W. Linville
parent 9b24001db1
commit cfa3fa405a
1 changed files with 12 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

21
drivers/net/wireless/rt2x00/rt2x00debug.c
View file

@ -587,29 +587,29 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
intf->driver_folder = intf->driver_folder =
debugfs_create_dir(intf->rt2x00dev->ops->name, debugfs_create_dir(intf->rt2x00dev->ops->name,
rt2x00dev->hw->wiphy->debugfsdir); rt2x00dev->hw->wiphy->debugfsdir);
if (IS_ERR(intf->driver_folder)) if (IS_ERR(intf->driver_folder) || !intf->driver_folder)
goto exit; goto exit;
intf->driver_entry = intf->driver_entry =
rt2x00debug_create_file_driver("driver", intf, &intf->driver_blob); 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; goto exit;
intf->chipset_entry = intf->chipset_entry =
rt2x00debug_create_file_chipset("chipset", rt2x00debug_create_file_chipset("chipset",
intf, &intf->chipset_blob); intf, &intf->chipset_blob);
if (IS_ERR(intf->chipset_entry)) if (IS_ERR(intf->chipset_entry) || !intf->chipset_entry)
goto exit; goto exit;
intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR, intf->dev_flags = debugfs_create_file("dev_flags", S_IRUSR,
intf->driver_folder, intf, intf->driver_folder, intf,
&rt2x00debug_fop_dev_flags); &rt2x00debug_fop_dev_flags);
if (IS_ERR(intf->dev_flags)) if (IS_ERR(intf->dev_flags) || !intf->dev_flags)
goto exit; goto exit;
intf->register_folder = intf->register_folder =
debugfs_create_dir("register", intf->driver_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; goto exit;
#define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \ #define RT2X00DEBUGFS_CREATE_REGISTER_ENTRY(__intf, __name) \
@ -619,7 +619,8 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
S_IRUSR | S_IWUSR, \ S_IRUSR | S_IWUSR, \
(__intf)->register_folder, \ (__intf)->register_folder, \
&(__intf)->offset_##__name); \ &(__intf)->offset_##__name); \
if (IS_ERR((__intf)->__name##_off_entry)) \ if (IS_ERR((__intf)->__name##_off_entry) \
|| !(__intf)->__name##_off_entry) \
goto exit; \ goto exit; \
\ \
(__intf)->__name##_val_entry = \ (__intf)->__name##_val_entry = \
@ -627,7 +628,8 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
S_IRUSR | S_IWUSR, \ S_IRUSR | S_IWUSR, \
(__intf)->register_folder, \ (__intf)->register_folder, \
(__intf), &rt2x00debug_fop_##__name);\ (__intf), &rt2x00debug_fop_##__name);\
if (IS_ERR((__intf)->__name##_val_entry)) \ if (IS_ERR((__intf)->__name##_val_entry) \
|| !(__intf)->__name##_val_entry) \
goto exit; \ goto exit; \
}) })
@ -640,13 +642,14 @@ void rt2x00debug_register(struct rt2x00_dev *rt2x00dev)
intf->queue_folder = intf->queue_folder =
debugfs_create_dir("queue", intf->driver_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; goto exit;
intf->queue_frame_dump_entry = intf->queue_frame_dump_entry =
debugfs_create_file("dump", S_IRUSR, intf->queue_folder, debugfs_create_file("dump", S_IRUSR, intf->queue_folder,
intf, &rt2x00debug_fop_queue_dump); 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; goto exit;
skb_queue_head_init(&intf->frame_dump_skbqueue); skb_queue_head_init(&intf->frame_dump_skbqueue);