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| author | Konstantin Shkolnyy <konstantin.shkolnyy@gmail.com> | 2016-05-04 16:56:52 -0500 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2016-05-05 11:27:02 +0200 |
| commit | a377f9e906af4df9071ba8ddba60188cb4013d93 (patch) | |
| tree | 0e7dff3765162cdb64e4f75c48734beb08e3608c /drivers/usb | |
| parent | 8c34d82e9dc67bb06e20e015ec677f82b72a26b3 (diff) | |
| download | linux-a377f9e906af4df9071ba8ddba60188cb4013d93.tar.bz2 | |
USB: serial: cp210x: fix hardware flow-control disable
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>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/cp210x.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index dd47823bb014..fef7a512bff4 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__); } |