dma: mv_xor: fix error checking of irq_of_parse_and_map()

The irq_of_parse_and_map() function returns 0 on failure, and does not
return an error code, so we fix the calling site of
irq_of_parse_and_map() in the mv_xor driver.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 0d4c24e..f2edd6a 100644 (file)
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -1312,8 +1312,8 @@ static int __devinit mv_xor_probe(struct platform_device *pdev)
                                dma_cap_set(DMA_INTERRUPT, cap_mask);
 
                        irq = irq_of_parse_and_map(np, 0);
-                       if (irq < 0) {
-                               ret = irq;
+                       if (!irq) {
+                               ret = -ENODEV;
                                goto err_channel_add;
                        }