linux-kernel - [PATCH 3.13.y-ckt 75/96] sata_fsl: fix error handling of irq_of_parse_and

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Message-Id: <1418671616-25482-76-git-send-email-kamal@canonical.com>
Date:	Mon, 15 Dec 2014 11:26:35 -0800
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Dmitry Torokhov <dtor@...omium.org>, Tejun Heo <tj@...nel.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13.y-ckt 75/96] sata_fsl: fix error handling of irq_of_parse_and_map

3.13.11-ckt13 -stable review patch.  If anyone has any objections, please let me know.

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

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

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: Kamal Mostafa <kamal@...onical.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 fb0b40a..ee2780d 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -1503,7 +1503,7 @@ 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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