Messages in this thread Patch in this message | | | From | Konstantin Shkolnyy <> | Subject | [PATCH v5 1/3] USB: serial: cp210x: Fixed RTS mode setting by the CRTSCTS flag. | Date | Wed, 4 May 2016 16:56:52 -0500 |
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A bug in the CRTSCTS handling caused RTS to alternate between CRTSCTS=0 => "RTS transmits active signal" and CRTSCTS=1 => "RTS receives flow control" instead of CRTSCTS=0 => "RTS is statically active" and CRTSCTS=1 => "RTS receives flow control" This only happened after first having enabled CRTSCTS.
Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> --- drivers/usb/serial/cp210x.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index dd47823..fef7a51 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -967,8 +967,7 @@ static void cp210x_set_termios(struct tty_struct *tty, } else { modem_ctl[0] &= ~0x7B; modem_ctl[0] |= 0x01; - /* FIXME - OR here instead of assignment looks wrong */ - modem_ctl[4] |= 0x40; + modem_ctl[4] = 0x40; dev_dbg(dev, "%s - flow control = NONE\n", __func__); } -- 1.8.4.5
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