linux-kernel - [PATCH 3.4 022/176] sata_fsl: fix error handling of irq_of_parse_and

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Date:	Thu,  9 Apr 2015 16:44:30 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Dmitry Torokhov <dtor@...omium.org>,
	Tejun Heo <tj@...nel.org>, Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 022/176] sata_fsl: fix error handling of irq_of_parse_and_map

From: Dmitry Torokhov <dtor@...omium.org>

3.4.107-rc1 review patch.  If anyone has any objections, please let me know.

------------------


commit aad0b624129709c94c2e19e583b6053520353fa8 upstream.

irq_of_parse_and_map() returns 0 on error (the result is unsigned int),
so testing for negative result never works.

Signed-off-by: Dmitry Torokhov <dtor@...omium.org>
Signed-off-by: Tejun Heo <tj@...nel.org>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/ata/sata_fsl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index d6577b9..3d3b59a 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -1426,7 +1426,7 @@ static int sata_fsl_probe(struct platform_device *ofdev)
 	host_priv->csr_base = csr_base;
 
 	irq = irq_of_parse_and_map(ofdev->dev.of_node, 0);
-	if (irq < 0) {
+	if (!irq) {
 		dev_err(&ofdev->dev, "invalid irq from platform\n");
 		goto error_exit_with_cleanup;
 	}
-- 
1.9.1

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