From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Sun, 27 Jan 2013 19:40:40 +0000 Subject: [patch] TTY: synclink, small cleanup in dtr_rts() Message-Id: <20130127194039.GA18787@elgon.mountain> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Greg Kroah-Hartman Cc: Jiri Slaby , Paul Fulghum , David Howells , linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org There is a kind of precedence problem here, but it doesn't affect how the code works because ->serial_signals is unsigned char. We want to clear two flags here. #define SerialSignal_RTS 0x20 /* Request to Send */ #define SerialSignal_DTR 0x80 /* Data Terminal Ready */ Without the parenthesis then it does: info->serial_signals &= 0x5f; With the parenthesis it does: info->serial_signals &= 0xffffff5f; info->serial_signals is an unsigned char so the two statements are equivalent, but it's cleaner to add the parenthesis. In other dtr_rts() functions the parenthesis are there so this makes it more consistent. Signed-off-by: Dan Carpenter diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 34e52ed..749fc05 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2466,7 +2466,7 @@ static void dtr_rts(struct tty_port *port, int onoff) if (onoff) info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; else - info->serial_signals &= ~SerialSignal_RTS + SerialSignal_DTR; + info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); set_signals(info); spin_unlock_irqrestore(&info->lock,flags); }