[PATCH -next] ASoC: tegra20-ac97: fix error return code in tegra20_ac97_platform_probe()

[PATCH -next] ASoC: tegra20-ac97: fix error return code in tegra20_ac97_platform_probe()

[Wei Yongjun]

From: Wei Yongjun <yongjun_wei-zrsr2BFq86L20UzCJQGyNP8+0UxHXcjY@public.gmane.org>

Fix to return -ENODEV instead of 0 when no GPIO supplied in
tegra20_ac97_platform_probe().

Signed-off-by: Wei Yongjun <yongjun_wei-zrsr2BFq86L20UzCJQGyNP8+0UxHXcjY@public.gmane.org>
---
 sound/soc/tegra/tegra20_ac97.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/tegra/tegra20_ac97.c b/sound/soc/tegra/tegra20_ac97.c
index d8b98d7..3ea9738 100644
--- a/sound/soc/tegra/tegra20_ac97.c
+++ b/sound/soc/tegra/tegra20_ac97.c
@@ -358,6 +358,7 @@ static int tegra20_ac97_platform_probe(struct platform_device *pdev)
 		}
 	} else {
 		dev_err(&pdev->dev, "no codec-reset GPIO supplied\n");
+		ret = -ENODEV;
 		goto err_clk_put;
 	}
 
@@ -365,6 +366,7 @@ static int tegra20_ac97_platform_probe(struct platform_device *pdev)
 					    "nvidia,codec-sync-gpio", 0);
 	if (!gpio_is_valid(ac97->sync_gpio)) {
 		dev_err(&pdev->dev, "no codec-sync GPIO supplied\n");
+		ret = -ENODEV;
 		goto err_clk_put;
 	}
 

Re: [PATCH -next] ASoC: tegra20-ac97: fix error return code in tegra20_ac97_platform_probe()

[Stephen Warren]

On 12/13/2013 10:15 PM, Wei Yongjun wrote:
> From: Wei Yongjun <yongjun_wei-zrsr2BFq86L20UzCJQGyNP8+0UxHXcjY@public.gmane.org>
> 
> Fix to return -ENODEV instead of 0 when no GPIO supplied in
> tegra20_ac97_platform_probe().

> diff --git a/sound/soc/tegra/tegra20_ac97.c b/sound/soc/tegra/tegra20_ac97.c

> @@ -358,6 +358,7 @@ static int tegra20_ac97_platform_probe(struct platform_device *pdev)
>  		}
>  	} else {
>  		dev_err(&pdev->dev, "no codec-reset GPIO supplied\n");
> +		ret = -ENODEV;

This would be better as:

		ret = ac97->reset_gpio;

Since that will propagate the exact error code (and incidentally,
deferred probe will work correctly then).

>  	if (!gpio_is_valid(ac97->sync_gpio)) {
>  		dev_err(&pdev->dev, "no codec-sync GPIO supplied\n");
> +		ret = -ENODEV;

Similarly here,

		ret = ac97->sync_gpio;