[PATCH v3] hwrng: exynos - Fix runtime PM imbalance on error

pm_runtime_resume_and_get() wraps around pm_runtime_get_sync() and
decrements the runtime PM usage counter in case the latter function
fails and keeps the counter balanced.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
Changes in v3:
  - use pm_runtime_resume_and_get()

Changes in v2:
  - removed Change-Id from the commit message

 drivers/char/hw_random/exynos-trng.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
index 8e1fe3f8dd2d..c8db62bc5ff7 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c

@@ -132,7 +132,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
 		return PTR_ERR(trng->mem);
 
 	pm_runtime_enable(&pdev->dev);
-	ret = pm_runtime_get_sync(&pdev->dev);
+	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Could not get runtime PM.\n");
 		goto err_pm_get;

@@ -165,7 +165,7 @@ static int exynos_trng_probe(struct platform_device *pdev)
 	clk_disable_unprepare(trng->clk);
 
 err_clock:
-	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_put_noidle(&pdev->dev);
 
 err_pm_get:
 	pm_runtime_disable(&pdev->dev);

-- 
2.26.2


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On 05/05/2021 14:29, Łukasz Stelmach wrote:

pm_runtime_resume_and_get() wraps around pm_runtime_get_sync() and
decrements the runtime PM usage counter in case the latter function
fails and keeps the counter balanced.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
Changes in v3:
  - use pm_runtime_resume_and_get()

Changes in v2:
  - removed Change-Id from the commit message

 drivers/char/hw_random/exynos-trng.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Krzysztof Kozlowski <redacted>

Best regards,
Krzysztof

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On Wed, May 05, 2021 at 08:29:14PM +0200, Łukasz Stelmach wrote:

pm_runtime_resume_and_get() wraps around pm_runtime_get_sync() and
decrements the runtime PM usage counter in case the latter function
fails and keeps the counter balanced.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
Changes in v3:
  - use pm_runtime_resume_and_get()

Changes in v2:
  - removed Change-Id from the commit message

 drivers/char/hw_random/exynos-trng.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu [off-list ref]
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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