ASoC: Ux500: Dispose of device nodes correctly

When of_parse_phandle() is used to find a device node, its
reference count is incremented by the helper. Once we're
finished with them, it's our responsibly to ensure they
are freed in the correct manor.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/sound/soc/ux500/mop500.c b/sound/soc/ux500/mop500.c
index 356611d9654d..54f7e25b6f7d 100644
--- a/sound/soc/ux500/mop500.c
+++ b/sound/soc/ux500/mop500.c
@@ -57,6 +57,20 @@ static struct snd_soc_card mop500_card = {
         .num_links = ARRAY_SIZE(mop500_dai_links),
 };
 
+static void mop500_of_node_put(void)
+{
+        int i;
+
+        for (i = 0; i < 2; i++) {
+                if (mop500_dai_links[i].cpu_of_node)
+                        of_node_put((struct device_node *)
+                                mop500_dai_links[i].cpu_of_node);
+                if (mop500_dai_links[i].codec_of_node)
+                        of_node_put((struct device_node *)
+                                mop500_dai_links[i].codec_of_node);
+        }
+}
+
 static int __devinit mop500_of_probe(struct platform_device *pdev,
                                 struct device_node *np)
 {
@@ -69,6 +83,7 @@ static int __devinit mop500_of_probe(struct platform_device *pdev,
 
         if (!(msp_np[0] && msp_np[1] && codec_np)) {
                 dev_err(&pdev->dev, "Phandle missing or invalid\n");
+                mop500_of_node_put();
                 return -EINVAL;
         }
 
@@ -83,6 +98,7 @@ static int __devinit mop500_of_probe(struct platform_device *pdev,
 
         return 0;
 }
+
 static int __devinit mop500_probe(struct platform_device *pdev)
 {
         struct device_node *np = pdev->dev.of_node;
@@ -128,6 +144,7 @@ static int __devexit mop500_remove(struct platform_device *pdev)
 
         snd_soc_unregister_card(mop500_card);
         mop500_ab8500_remove(mop500_card);
+        mop500_of_node_put();
 
         return 0;
 }