diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 693ed7e4871a..61c9f9d28ee9 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -324,12 +324,20 @@ static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type,
 	 */
 	unsigned int A, B;
 
-	/* Respect the specified baud rate limits */
-	baud = max_t(int, baud, 75);
+	/*
+	 * NOTE: The Windows driver allows maximum baud rates of 110% of the
+	 * specified maximium value.
+	 * Quick tests with early (2004) HX (rev. A) chips suggest, that even
+	 * higher baud rates (up to the maximum of 24M baud !) are working fine,
+	 * but that should really be tested carefully in "real life" scenarios
+	 * before removing the upper limit completely.
+	 * Baud rates smaller than the specified 75 baud are definitely working
+	 * fine.
+	 */
 	if (type == HX)
-		baud = min_t(int, baud, 6000000);
+		baud = min_t(int, baud, 6000000 * 1.1);
 	else
-		baud = min_t(int, baud, 1228800);
+		baud = min_t(int, baud, 1228800 * 1.1);
 	/* Determine factors A and B */
 	A = 0;
 	B = 12000000 * 32 / baud;  /* 12MHz */