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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: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2014-11-18 11:25:19 +01:00
parent 204ec6e07e
commit 5d1678a33c
1 changed files with 48 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
drivers/usb/serial/keyspan.c
View File

@ -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);
}