From 14996122a47bb489233629533bc059af50628ec8 Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Mon, 21 Sep 2015 15:33:38 +0200 Subject: [PATCH] tty: serial: lpc32xx_hs: fix handling platform_get_irq result The function can return negative values. The problem has been detected using proposed semantic patch scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1]. [1]: http://permalink.gmane.org/gmane.linux.kernel/2038576 Signed-off-by: Andrzej Hajda Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/lpc32xx_hs.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c index e92d7ebe9e77..7eb04ae71cc8 100644 --- a/drivers/tty/serial/lpc32xx_hs.c +++ b/drivers/tty/serial/lpc32xx_hs.c @@ -691,12 +691,13 @@ static int serial_hs_lpc32xx_probe(struct platform_device *pdev) p->port.mapbase = res->start; p->port.membase = NULL; - p->port.irq = platform_get_irq(pdev, 0); - if (p->port.irq < 0) { + ret = platform_get_irq(pdev, 0); + if (ret < 0) { dev_err(&pdev->dev, "Error getting irq for HS UART port %d\n", uarts_registered); - return p->port.irq; + return ret; } + p->port.irq = ret; p->port.iotype = UPIO_MEM32; p->port.uartclk = LPC32XX_MAIN_OSC_FREQ;