[patch]ratelimit debounce error messages

Hi,

flaky hardware can cause a lot of debounce failed messages. To limit
the performance impact, a ratelimit should be used.

	Regards
		Oliver

Signed-off-by: Oliver Neukum <[email protected]>
----

--- a/drivers/usb/core/hub.c	2007-02-27 10:16:21.000000000 +0100
+++ b/drivers/usb/core/hub.c	2007-02-27 10:16:30.000000000 +0100
@@ -2440,7 +2440,7 @@
 
 	if (portchange & USB_PORT_STAT_C_CONNECTION) {
 		status = hub_port_debounce(hub, port1);
-		if (status < 0) {
+		if (status < 0 && printk_ratelimit()) {
 			dev_err (hub_dev,
 				"connect-debounce failed, port %d disabled\n",
 				port1);


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