[PATCH] ASoC: mmp-sspa: Fix the error handling in probe()

[PATCH] ASoC: mmp-sspa: Fix the error handling in probe()

[Lubomir Rintel]

If we fail after pm_runtime_enable(), we fail to undo it. Same with
clk_prepare_enable(). Let's order them after all things that can fail.

Fixes: 7d98cc648253 ("ASoC: mmp-sspa: Add support for the runtime power management")
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
 sound/soc/pxa/mmp-sspa.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/sound/soc/pxa/mmp-sspa.c b/sound/soc/pxa/mmp-sspa.c
index 60bf6fe05315..77a6d2998570 100644
--- a/sound/soc/pxa/mmp-sspa.c
+++ b/sound/soc/pxa/mmp-sspa.c
@@ -467,6 +467,7 @@ static const struct snd_soc_component_driver mmp_sspa_component = {
 static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 {
 	struct sspa_priv *sspa;
+	int ret;
 
 	sspa = devm_kzalloc(&pdev->dev,
 				sizeof(struct sspa_priv), GFP_KERNEL);
@@ -518,8 +519,6 @@ static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 			return PTR_ERR(sspa->sysclk);
 		}
 	}
-	pm_runtime_enable(&pdev->dev);
-	clk_prepare_enable(sspa->audio_clk);
 	platform_set_drvdata(pdev, sspa);
 
 	sspa->playback_dma_data.maxburst = 4;
@@ -529,16 +528,21 @@ static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 	sspa->playback_dma_data.addr = 0x80 + SSPA_D;
 
 	if (pdev->dev.of_node) {
-		int ret;
-
 		ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
 						      &mmp_pcm_config, 0);
 		if (ret)
 			return ret;
 	}
 
-	return devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
-					       &mmp_sspa_dai, 1);
+	ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
+					      &mmp_sspa_dai, 1);
+	if (ret)
+		return ret;
+
+	pm_runtime_enable(&pdev->dev);
+	clk_prepare_enable(sspa->audio_clk);
+
+	return 0;
 }
 
 static int asoc_mmp_sspa_remove(struct platform_device *pdev)
-- 
2.26.2

Re: [PATCH] ASoC: mmp-sspa: Fix the error handling in probe()

[Mark Brown]

On Wed, 20 May 2020 10:35:16 +0200, Lubomir Rintel wrote:
> If we fail after pm_runtime_enable(), we fail to undo it. Same with
> clk_prepare_enable(). Let's order them after all things that can fail.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: mmp-sspa: Fix the error handling in probe()
      commit: 6ea460d52299f7febd408f2710d7c43ce505bc2c

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark