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imx: Check for NULL pointer deref before calling tty_encode_baud_rate

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Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sascha Hauer 2009-06-16 17:02:15 +01:00 committed by Linus Torvalds
parent 0ccad87012
commit 1a2c4b3147
1 changed files with 7 additions and 5 deletions
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12
drivers/serial/imx.c
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@ -924,11 +924,13 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
rational_best_approximation(16 * div * baud, sport->port.uartclk,
1 << 16, 1 << 16, &num, &denom);
tdiv64 = sport->port.uartclk;
tdiv64 *= num;
do_div(tdiv64, denom * 16 * div);
tty_encode_baud_rate(sport->port.info->port.tty,
(speed_t)tdiv64, (speed_t)tdiv64);
if (port->info && port->info->port.tty) {
tdiv64 = sport->port.uartclk;
tdiv64 *= num;
do_div(tdiv64, denom * 16 * div);
tty_encode_baud_rate(sport->port.info->port.tty,
(speed_t)tdiv64, (speed_t)tdiv64);
}
num -= 1;
denom -= 1;