add trace in function config_usb_cfg_link()
will show which function was added to gadget configuration.
Signed-off-by: Linyu Yuan <quic_linyyuan@xxxxxxxxxxx>
---
drivers/usb/gadget/configfs.c | 4 ++++
drivers/usb/gadget/configfs_trace.h | 17 +++++++++++++++++
2 files changed, 21 insertions(+)
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index f7f3af8..8c64640 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -426,6 +426,10 @@ static int config_usb_cfg_link(
struct usb_function *f;
int ret;
+ trace_config_usb_cfg_link(config_item_name(&gi->group.cg_item),
+ config_item_name(usb_cfg_ci),
+ config_item_name(usb_func_ci));
+
mutex_lock(&gi->lock);
/*
* Make sure this function is from within our _this_ gadget and not
diff --git a/drivers/usb/gadget/configfs_trace.h b/drivers/usb/gadget/configfs_trace.h
index f2e17e4..5c666f1 100644
--- a/drivers/usb/gadget/configfs_trace.h
+++ b/drivers/usb/gadget/configfs_trace.h
@@ -26,6 +26,23 @@ TRACE_EVENT(gadget_dev_desc_UDC_store,
__get_str(udc_name))
);
+TRACE_EVENT(config_usb_cfg_link,
+ TP_PROTO(char *name, char *cfg, char *func),
+ TP_ARGS(name, cfg, func),
+ TP_STRUCT__entry(
+ __string(group_name, name)
+ __string(cfg_name, cfg)
+ __string(func_name, func)
+ ),
+ TP_fast_assign(
+ __assign_str(group_name, name);
+ __assign_str(cfg_name, cfg);
+ __assign_str(func_name, func)
+ ),
+ TP_printk("gadget:%s cfg:%s link func:%s", __get_str(group_name),
+ __get_str(cfg_name), __get_str(func_name))
+);
+
#endif /* __GADGET_TRACE_H */
/* this part has to be here */
--
2.7.4
