| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 30/59] USB: serial: mct_u232: fix big-endian baud-rate handling | Date | Tue, 23 May 2017 22:09:58 +0200 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Johan Hovold <johan@kernel.org>
commit 26cede343656c0bc2c33cdc783771282405c7fb2 upstream.
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") Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-By: Pete Zaitcev <zaitcev@yahoo.com> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/serial/mct_u232.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/serial/mct_u232.c +++ b/drivers/usb/serial/mct_u232.c @@ -189,7 +189,7 @@ static int mct_u232_set_baud_rate(struct 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,
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