[PATCH 1/2] ASoC: img: img-i2s-in: Fix clock leak on probe failure

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@gmail.com>

The error path of img_i2s_in_probe() only suspends the device by hand
when runtime PM is not enabled, and otherwise relies on the
asynchronous suspend request queued by pm_runtime_put(). The
pm_runtime_disable() call that follows cancels that request if it is
still pending, leaving the sys clock enabled. This happens in particular
when the reset control lookup returns -EPROBE_DEFER.

Disable runtime PM first and then suspend the device by hand if it is
not suspended, as img_i2s_in_dev_remove() does. On the -EPROBE_DEFER
path, use pm_runtime_put_noidle() instead of pm_runtime_put(), as there
is no point in queuing a suspend request that gets cancelled right away.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/img/img-i2s-in.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound/soc/img/img-i2s-in.c b/sound/soc/img/img-i2s-in.c
index a0c87e2a9b30..0c136dca186c 100644
--- a/sound/soc/img/img-i2s-in.c
+++ b/sound/soc/img/img-i2s-in.c
@@ -490,7 +490,7 @@ static int img_i2s_in_probe(struct platform_device *pdev)
 	if (IS_ERR(rst)) {
 		if (PTR_ERR(rst) == -EPROBE_DEFER) {
 			ret = -EPROBE_DEFER;
-			pm_runtime_put(&pdev->dev);
+			pm_runtime_put_noidle(&pdev->dev);
 			goto err_suspend;
 		}
 
@@ -534,8 +534,12 @@ static int img_i2s_in_probe(struct platform_device *pdev)
 	return 0;
 
 err_suspend:
-	if (!pm_runtime_enabled(&pdev->dev))
+	pm_runtime_disable(&pdev->dev);
+	if (!pm_runtime_status_suspended(&pdev->dev))
 		img_i2s_in_runtime_suspend(&pdev->dev);
+
+	return ret;
+
 err_pm_disable:
 	pm_runtime_disable(&pdev->dev);
 
-- 
2.43.0