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USB: serial: ch341: fix line settings after reset-resume

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A recent change added support for modifying the default line-control
settings, but did not make sure that the modified settings were used as
part of reconfiguration after a device has been reset during resume.

This caused a port that was open before suspend to be unusable until
being closed and reopened.

Fixes: ba781bdf86 ("USB: serial: ch341: add support for parity, frame
length, stop bits")
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2017-01-06 19:15:15 +01:00
parent ce5e292828
commit 3cca8624b6
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/serial/ch341.c
View file

@ -95,6 +95,7 @@ struct ch341_private {
unsigned baud_rate; /* set baud rate */
u8 line_control; /* set line control value RTS/DTR */
u8 line_status; /* active status of modem control inputs */
u8 lcr;
};
static void ch341_set_termios(struct tty_struct *tty,
@ -232,7 +233,7 @@ static int ch341_configure(struct usb_device *dev, struct ch341_private *priv)
if (r < 0)
goto out;
r = ch341_init_set_baudrate(dev, priv, 0);
r = ch341_init_set_baudrate(dev, priv, priv->lcr);
if (r < 0)
goto out;
@ -397,6 +398,8 @@ static void ch341_set_termios(struct tty_struct *tty,
if (r < 0 && old_termios) {
priv->baud_rate = tty_termios_baud_rate(old_termios);
tty_termios_copy_hw(&tty->termios, old_termios);
} else if (r == 0) {
priv->lcr = ctrl;
}
}