Revert "usb: pl2303: also use the divisor based baud rate encoding method for baud rates < 115200 with HX chips"

This reverts commit 61fa8d694b8547894b57ea0d99d0120a58f6ebf8.

Revert all of the pl2303 changes that went into 3.12-rc1 and -rc2 as
they cause regressions on some versions of the chip.  This will all be
revisited for later kernel versions when we can figure out how to handle
this in a way that does not break working devices.

Reported-by: Mika Westerberg <>
Cc: Frank Schäfer <>
Acked-by: Johan Hovold <>
Signed-off-by: Greg Kroah-Hartman <>
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 09fb55c..61c9f9d 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -395,7 +395,7 @@
 	 * 2) Divisor based method: encodes a divisor to a base value (12MHz*32)
 	 *    => supported by HX chips (and likely not by type_0/1 chips)
-	if (type != HX)
+	if (type != HX || baud <= 115200)
 		baud = pl2303_baudrate_encode_direct(baud, type, buf);
 		baud = pl2303_baudrate_encode_divisor(baud, type, buf);