From 5d1678a33c731b56e245e888fdae5e88efce0997 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 18 Nov 2014 11:25:19 +0100 Subject: [PATCH] USB: keyspan: fix tty line-status reporting Fix handling of TTY error flags, which are not bitmasks and must specifically not be ORed together as this prevents the line discipline from recognising them. Also insert null characters when reporting overrun errors as these are not associated with the received character. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable Signed-off-by: Johan Hovold --- drivers/usb/serial/keyspan.c | 76 +++++++++++++++++++++++------------- 1 file changed, 48 insertions(+), 28 deletions(-) diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c index 93cb7cebda62..7799d8bc4a63 100644 --- a/drivers/usb/serial/keyspan.c +++ b/drivers/usb/serial/keyspan.c @@ -321,14 +321,19 @@ static void usa26_indat_callback(struct urb *urb) /* some bytes had errors, every byte has status */ dev_dbg(&port->dev, "%s - RX error!!!!\n", __func__); for (i = 0; i + 1 < urb->actual_length; i += 2) { - int stat = data[i], flag = 0; - if (stat & RXERROR_OVERRUN) - flag |= TTY_OVERRUN; - if (stat & RXERROR_FRAMING) - flag |= TTY_FRAME; - if (stat & RXERROR_PARITY) - flag |= TTY_PARITY; + int stat = data[i]; + int flag = TTY_NORMAL; + + if (stat & RXERROR_OVERRUN) { + tty_insert_flip_char(&port->port, 0, + TTY_OVERRUN); + } /* XXX should handle break (0x10) */ + if (stat & RXERROR_PARITY) + flag = TTY_PARITY; + else if (stat & RXERROR_FRAMING) + flag = TTY_FRAME; + tty_insert_flip_char(&port->port, data[i+1], flag); } @@ -649,14 +654,19 @@ static void usa49_indat_callback(struct urb *urb) } else { /* some bytes had errors, every byte has status */ for (i = 0; i + 1 < urb->actual_length; i += 2) { - int stat = data[i], flag = 0; - if (stat & RXERROR_OVERRUN) - flag |= TTY_OVERRUN; - if (stat & RXERROR_FRAMING) - flag |= TTY_FRAME; - if (stat & RXERROR_PARITY) - flag |= TTY_PARITY; + int stat = data[i]; + int flag = TTY_NORMAL; + + if (stat & RXERROR_OVERRUN) { + tty_insert_flip_char(&port->port, 0, + TTY_OVERRUN); + } /* XXX should handle break (0x10) */ + if (stat & RXERROR_PARITY) + flag = TTY_PARITY; + else if (stat & RXERROR_FRAMING) + flag = TTY_FRAME; + tty_insert_flip_char(&port->port, data[i+1], flag); } @@ -713,15 +723,19 @@ static void usa49wg_indat_callback(struct urb *urb) */ for (x = 0; x + 1 < len && i + 1 < urb->actual_length; x += 2) { - int stat = data[i], flag = 0; + int stat = data[i]; + int flag = TTY_NORMAL; - if (stat & RXERROR_OVERRUN) - flag |= TTY_OVERRUN; - if (stat & RXERROR_FRAMING) - flag |= TTY_FRAME; - if (stat & RXERROR_PARITY) - flag |= TTY_PARITY; + if (stat & RXERROR_OVERRUN) { + tty_insert_flip_char(&port->port, 0, + TTY_OVERRUN); + } /* XXX should handle break (0x10) */ + if (stat & RXERROR_PARITY) + flag = TTY_PARITY; + else if (stat & RXERROR_FRAMING) + flag = TTY_FRAME; + tty_insert_flip_char(&port->port, data[i+1], flag); i += 2; @@ -784,14 +798,20 @@ static void usa90_indat_callback(struct urb *urb) /* some bytes had errors, every byte has status */ dev_dbg(&port->dev, "%s - RX error!!!!\n", __func__); for (i = 0; i + 1 < urb->actual_length; i += 2) { - int stat = data[i], flag = 0; - if (stat & RXERROR_OVERRUN) - flag |= TTY_OVERRUN; - if (stat & RXERROR_FRAMING) - flag |= TTY_FRAME; - if (stat & RXERROR_PARITY) - flag |= TTY_PARITY; + int stat = data[i]; + int flag = TTY_NORMAL; + + if (stat & RXERROR_OVERRUN) { + tty_insert_flip_char( + &port->port, 0, + TTY_OVERRUN); + } /* XXX should handle break (0x10) */ + if (stat & RXERROR_PARITY) + flag = TTY_PARITY; + else if (stat & RXERROR_FRAMING) + flag = TTY_FRAME; + tty_insert_flip_char(&port->port, data[i+1], flag); }