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Commit 1a2c4b31 authored by Sascha Hauer's avatar Sascha Hauer Committed by Linus Torvalds
Browse files

imx: Check for NULL pointer deref before calling tty_encode_baud_rate 



Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0ccad870

drivers/serial/imx.c

+7 −5
Original line number Diff line number Diff line
@@ -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);



	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;