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USB: add usb debugfs directory 

Add a common usb directory in debugfs that the usb subsystem can use.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2009-04-24 14:56:26 -07:00
parent 84fe6e799d
commit 00048b8bde
2 changed files with 25 additions and 0 deletions
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22
drivers/usb/core/usb.c
View File

@ -34,6 +34,7 @@
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <asm/io.h>
#include <linux/scatterlist.h>
@ -1001,6 +1002,22 @@ static struct notifier_block usb_bus_nb = {
.notifier_call = usb_bus_notify,
};
struct dentry *usb_debug_root;
EXPORT_SYMBOL_GPL(usb_debug_root);
static int usb_debugfs_init(void)
{
usb_debug_root = debugfs_create_dir("usb", NULL);
if (!usb_debug_root)
return -ENOENT;
return 0;
}
static void usb_debugfs_cleanup(void)
{
debugfs_remove(usb_debug_root);
}
/*
* Init
*/
@ -1012,6 +1029,10 @@ static int __init usb_init(void)
return 0;
}
retval = usb_debugfs_init();
if (retval)
goto out;
retval = ksuspend_usb_init();
if (retval)
goto out;
@ -1083,6 +1104,7 @@ static void __exit usb_exit(void)
bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
ksuspend_usb_cleanup();
usb_debugfs_cleanup();
}
subsys_initcall(usb_init);

3
include/linux/usb.h
View File

@ -1558,6 +1558,9 @@ extern void usb_unregister_notify(struct notifier_block *nb);
#define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
format "\n" , ## arg)
/* debugfs stuff */
extern struct dentry *usb_debug_root;
#endif /* __KERNEL__ */
#endif