serial: mxs-auart: Check for platform_get_irq() error

We should check whether platform_get_irq() failed, and in the case of error
this needs to be propagated.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 767fddaa7576..b54b6a2a5774 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -1265,6 +1265,9 @@ static int mxs_auart_probe(struct platform_device *pdev)
         s->mctrl_prev = 0;
 
         irq = platform_get_irq(pdev, 0);
+        if (irq < 0)
+                return irq;
+
         s->port.irq = irq;
         ret = devm_request_irq(&pdev->dev, irq, mxs_auart_irq_handle, 0,
                                dev_name(&pdev->dev), s);