USB: serial: mct_u232: fix big-endian baud-rate handling
authorJohan Hovold <johan@kernel.org>
Thu, 11 May 2017 09:41:20 +0000 (11:41 +0200)
committerJohan Hovold <johan@kernel.org>
Mon, 15 May 2017 09:51:15 +0000 (11:51 +0200)
Drop erroneous cpu_to_le32 when setting the baud rate, something which
corrupted the divisor on big-endian hosts.

Found using sparse:

warning: incorrect type in argument 1 (different base types)
    expected unsigned int [unsigned] [usertype] val
    got restricted __le32 [usertype] <noident>

Fixes: af2ac1a091bc ("USB: serial mct_usb232: move DMA buffers to heap")
Cc: stable <stable@vger.kernel.org> # 2.6.34
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-By: Pete Zaitcev <zaitcev@yahoo.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
drivers/usb/serial/mct_u232.c

index edbc81f205c253f41f7afa2d3375ef7818e0ae86..70f346f1aa86f4a7c9eb880cd725cd0d2e6fb1b5 100644 (file)
@@ -189,7 +189,7 @@ static int mct_u232_set_baud_rate(struct tty_struct *tty,
                return -ENOMEM;
 
        divisor = mct_u232_calculate_baud_rate(serial, value, &speed);
-       put_unaligned_le32(cpu_to_le32(divisor), buf);
+       put_unaligned_le32(divisor, buf);
        rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
                                MCT_U232_SET_BAUD_RATE_REQUEST,
                                MCT_U232_SET_REQUEST_TYPE,