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Commit 00048b8b authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

USB: add usb debugfs directory 



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

Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 84fe6e79

drivers/usb/core/usb.c

+22 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/usb.h

+3 −0
Original line number Diff line number Diff line
@@ -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