usbnet: add usbnet_event_names[] for kevent

Modify the netdev_dbg content from int to char * in usbnet_defer_kevent(),
this looks more readable.
Signed-off-by: NYajun Deng <yajun.deng@linux.dev>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/usbnet.c

@@ -74,6 +74,23 @@ MODULE_PARM_DESC (msg_level, "Override default message level");
 
 /*-------------------------------------------------------------------------*/
 
+static const char * const usbnet_event_names[] = {
+	[EVENT_TX_HALT]		   = "EVENT_TX_HALT",
+	[EVENT_RX_HALT]		   = "EVENT_RX_HALT",
+	[EVENT_RX_MEMORY]	   = "EVENT_RX_MEMORY",
+	[EVENT_STS_SPLIT]	   = "EVENT_STS_SPLIT",
+	[EVENT_LINK_RESET]	   = "EVENT_LINK_RESET",
+	[EVENT_RX_PAUSED]	   = "EVENT_RX_PAUSED",
+	[EVENT_DEV_ASLEEP]	   = "EVENT_DEV_ASLEEP",
+	[EVENT_DEV_OPEN]	   = "EVENT_DEV_OPEN",
+	[EVENT_DEVICE_REPORT_IDLE] = "EVENT_DEVICE_REPORT_IDLE",
+	[EVENT_NO_RUNTIME_PM]	   = "EVENT_NO_RUNTIME_PM",
+	[EVENT_RX_KILL]		   = "EVENT_RX_KILL",
+	[EVENT_LINK_CHANGE]	   = "EVENT_LINK_CHANGE",
+	[EVENT_SET_RX_MODE]	   = "EVENT_SET_RX_MODE",
+	[EVENT_NO_IP_ALIGN]	   = "EVENT_NO_IP_ALIGN",
+};
+
 /* handles CDC Ethernet and many other network "bulk data" interfaces */
 int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
 {
@@ -452,9 +469,9 @@ void usbnet_defer_kevent (struct usbnet *dev, int work)
 {
 	set_bit (work, &dev->flags);
 	if (!schedule_work (&dev->kevent))
-		netdev_dbg(dev->net, "kevent %d may have been dropped\n", work);
+		netdev_dbg(dev->net, "kevent %s may have been dropped\n", usbnet_event_names[work]);
 	else
-		netdev_dbg(dev->net, "kevent %d scheduled\n", work);
+		netdev_dbg(dev->net, "kevent %s scheduled\n", usbnet_event_names[work]);
 }
 EXPORT_SYMBOL_GPL(usbnet_defer_kevent);