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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 <a.hajda@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrzej Hajda 2015-09-21 15:33:38 +02:00 committed by Greg Kroah-Hartman
parent 618bbaa260
commit 14996122a4
1 changed files with 4 additions and 3 deletions
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7
drivers/tty/serial/lpc32xx_hs.c
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@ -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;