linux-kernel - [PATCH] dmaengine: sirf: fix irq number error check

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Message-Id: <20160902231737.1721916-1-arnd@arndb.de>
Date:   Sat,  3 Sep 2016 01:17:20 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Vinod Koul <vinod.koul@...el.com>, Barry Song <baohua@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Dan Williams <dan.j.williams@...el.com>,
        dmaengine@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] dmaengine: sirf: fix irq number error check

irq_of_parse_and_map() returns 0 on error, no NO_IRQ, so the
failure condition can never be met.

This changes the comparison to check for zero instead.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/dma/sirf-dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
index a96e4a480de5..8f62edad51be 100644
--- a/drivers/dma/sirf-dma.c
+++ b/drivers/dma/sirf-dma.c
@@ -866,7 +866,7 @@ static int sirfsoc_dma_probe(struct platform_device *op)
 	}
 
 	sdma->irq = irq_of_parse_and_map(dn, 0);
-	if (sdma->irq == NO_IRQ) {
+	if (!sdma->irq) {
 		dev_err(dev, "Error mapping IRQ!\n");
 		return -EINVAL;
 	}
-- 
2.9.0