diff options
| author | Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> | 2016-05-04 16:56:52 -0500 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:05 +0200 |
| commit | ed4cb5b1b80513f61d63d05c8319f0f88fce9aa6 (patch) | |
| tree | 461933ac860c9f64b30397849c38c3aed293f7f1 /drivers/usb/serial | |
| parent | 935ed6a31bda245bb67e13283cff2f3cb5c86a97 (diff) | |
USB: serial: cp210x: fix hardware flow-control disable
commit a377f9e906af4df9071ba8ddba60188cb4013d93 upstream.
A bug in the CRTSCTS handling caused RTS to alternate between
CRTSCTS=0 => "RTS is transmit active signal" and
CRTSCTS=1 => "RTS is used for receive flow control"
instead of
CRTSCTS=0 => "RTS is statically active" and
CRTSCTS=1 => "RTS is used for receive flow control"
This only happened after first having enabled CRTSCTS.
Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com>
Fixes: 39a66b8d22a3 ("[PATCH] USB: CP2101 Add support for flow control")
[johan: reword commit message ]
Signed-off-by: Johan Hovold <johan@kernel.org>
[johan: backport to 4.4 ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers/usb/serial')
| -rw-r--r-- | drivers/usb/serial/cp210x.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index 0093261cc..d1582d833 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -793,7 +793,7 @@ static void cp210x_set_termios(struct tty_struct *tty, } else { modem_ctl[0] &= ~0x7B; modem_ctl[0] |= 0x01; - modem_ctl[1] |= 0x40; + modem_ctl[1] = 0x40; dev_dbg(dev, "%s - flow control = NONE\n", __func__); } |