[PATCH] dmaengine: zx: add check on platform_get_irq return value

[Gustavo A. R. Silva]

Check return value from call to platform_get_irq(),
so in case of failure print error message and propagate
the return value.

Signed-off-by: Gustavo A. R. Silva <garsi...@embeddedor.com>
---
 drivers/dma/zx_dma.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/dma/zx_dma.c b/drivers/dma/zx_dma.c
index 2bb6953..26196de 100644
--- a/drivers/dma/zx_dma.c
+++ b/drivers/dma/zx_dma.c
@@ -786,6 +786,11 @@ static int zx_dma_probe(struct platform_device *op)
        }
 
        d->irq = platform_get_irq(op, 0);
+       if (d->irq < 0) {
+               dev_err(&op->dev, "failed to get IRQ: %d\n", d->irq);
+               return d->irq;
+       }
+
        ret = devm_request_irq(&op->dev, d->irq, zx_dma_int_handler,
                               0, DRIVER_NAME, d);
        if (ret)
-- 
2.5.0