Add a common usb directory in debugfs that the usb subsystem can use.
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/core/usb.c | 22 ++++++++++++++++++++++
include/linux/usb.h | 3 +++
2 files changed, 25 insertions(+)
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -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);
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1558,6 +1558,9 @@ extern void usb_unregister_notify(struct
#define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
format "\n" , ## arg)
+/* debugfs stuff */
+extern struct dentry *usb_debug_root;
+
#endif /* __KERNEL__ */
#endif
--
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