linux-kernel - [PATCH] w1: omap-hdq: fix error return code in omap_hdq

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Message-ID: <20170630224402.GA22776@embeddedgus>
Date:   Fri, 30 Jun 2017 17:44:02 -0500
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Evgeniy Polyakov <zbr@...emap.net>
Cc:     linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Subject: [PATCH] w1: omap-hdq: fix error return code in omap_hdq_probe()

platform_get_irq() returns an error code, but the omap_hdq
driver ignores it and always returns -ENXIO. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error.

Print error message and propagate the return value of
platform_get_irq on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
---
 drivers/w1/masters/omap_hdq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index 3612542..83fc9aa 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -704,7 +704,8 @@ static int omap_hdq_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq	< 0) {
-		ret = -ENXIO;
+		dev_dbg(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+		ret = irq;
 		goto err_irq;
 	}
 
-- 
2.5.0