USB: pl2303: fix DTR/RTS being raised on baud rate change

PATCH New Johan Hovold 1 participant 1 message Mar 23, 2012 1 message not in the archive

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Stable branch USB USB serial

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Johan Hovold

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2012-03-23 14:23 UTC #1 lore raw

PATCH 1/1 USB: pl2303: fix DTR/RTS being raised on baud rate change

DTR/RTS should only be raised when changing baudrate from B0 and not on any baud rate change (> B0).

Reported-by Søren Holm <[email protected]>

Cc stable <[email protected]>

Signed-off-by Johan Hovold <[email protected]>

---
 drivers/usb/serial/pl2303.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

drivers/usb/serial/pl2303.c +1 -1

index 052c401..c3b1911 100644
@@ -420,7 +420,7 @@ static void pl2303_set_termios(struct tty_struct *tty,
 	control = priv->line_control;
 	if ((cflag & CBAUD) == B0)
 		priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
-	else
+	else if ((old_termios->c_cflag & CBAUD) == B0)
 		priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 	if (control != priv->line_control) {
 		control = priv->line_control;

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