linux-kernel - [PATCH] ASoC: fsl-sai: Add device tree nodes and its availiable check

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Date:	Fri, 10 Jan 2014 10:05:50 +0800
From:	Xiubo Li <Li.Xiubo@...escale.com>
To:	<broonie@...nel.org>, <lgirdwood@...il.com>
CC:	<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
	Xiubo Li <Li.Xiubo@...escale.com>
Subject: [PATCH] ASoC: fsl-sai: Add device tree nodes and its availiable check

SAIs that are not connected on the board should have a
status = "disabled" property in their device tree nodes.

Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
---
 sound/soc/fsl/fsl_sai.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index cdd3fa8..6b2ab91 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -404,6 +404,9 @@ static int fsl_sai_probe(struct platform_device *pdev)
 	struct resource *res;
 	int ret;
 
+	if (!np || !of_device_is_available(np))
+		return -ENODEV;
+
 	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
 	if (!sai)
 		return -ENOMEM;
-- 
1.8.4


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