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| author | Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> | 2016-05-05 00:56:52 +0300 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-06-03 18:30:35 +0300 |
| commit | 075707c9627627f1a0ac425310563d27914f3b4f (patch) | |
| tree | f1ba62d9b5b0c898618c947b7b8ba7cb3f174ce0 /drivers/usb | |
| parent | b6e4114a6af19c2b91c29d9e56af20c3657c6711 (diff) | |
| download | linux-075707c9627627f1a0ac425310563d27914f3b4f.tar.xz | |
USB: serial: cp210x: fix hardware flow-control disable
[ Upstream commit a377f9e906af4df9071ba8ddba60188cb4013d93 ]
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")
Cc: stable <stable@vger.kernel.org>
[johan: reword commit message ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/usb')
| -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 3b0a52f4a32f..685a90168d8e 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -785,7 +785,7 @@ 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__); } |