Commit f6b6f52b authored May 09, 2013 by Lee Jones Committed by Greg Kroah-Hartman May 20, 2013

serial: pl011: protect attribute read from NULL platform data struct

It's completely feasible that platform data will be empty i.e. when
booting with Device Tree with no device AUXDATA. So we must protect
it's use in these use-cases, or risk a kernel Oops.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 383d2fc9

drivers/tty/serial/amba-pl011.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -332,7 +332,7 @@ static void pl011_dma_probe_initcall(struct device dev, struct uart_amba_port
		dmaengine_slave_config(chan, &rx_conf);
		uap->dmarx.chan = chan;

		if (plat->dma_rx_poll_enable) {
		if (plat && plat->dma_rx_poll_enable) {
		/* Set poll rate if specified. */
		if (plat->dma_rx_poll_rate) {
		uap->dmarx.auto_poll_rate = false;