diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index d726da8c5930e9244288e8238aac36fe52bdff80..7bebb47788970faded0aeb2423f2b09fb8705d28 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -10424,8 +10424,8 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
 
 	udelay(10);
 
-	/* 250 usec to allow enough time on some 10/100 Mbps devices.  */
-	for (i = 0; i < 25; i++) {
+	/* 350 usec to allow enough time on some 10/100 Mbps devices.  */
+	for (i = 0; i < 35; i++) {
 		tw32_f(HOSTCC_MODE, tp->coalesce_mode | HOSTCC_MODE_ENABLE |
 		       coal_now);