From 54dc5792ea933a3ff8c62a1f9ea9e4e6cbdd324a Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Fri, 1 Nov 2013 09:19:56 -0700
Subject: [PATCH] Revert "USB: pl2303: restrict the divisor based baud rate
encoding method to the "HX" chip type"
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This reverts commit b8bdad608213caffa081a97d2e937e5fe08c4046.
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 <mika.westerberg@linux.intel.com>
Cc: Frank Schäfer <fschaefer.oss@googlemail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/serial/pl2303.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 244820193e10d..1e6de4cd079d6 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -305,14 +305,10 @@ static void pl2303_encode_baudrate(struct tty_struct *tty,
if (spriv->type != HX)
baud = min_t(int, baud, 1228800);
- if (spriv->type != HX || baud <= 115200) {
- /* Direct (standard) baud rate encoding method */
+ if (baud <= 115200) {
put_unaligned_le32(baud, buf);
} else {
/*
- * NOTE: it's not clear if the type_0/1 chips
- * support this method
- *
* Apparently the formula for higher speeds is:
* baudrate = 12M * 32 / (2^buf[1]) / buf[0]
*/
--
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