[PATCH 1/2] crypto: sun8i-ce: undo runtime PM changes during driver removal

[Ovidiu Panait]

The pm_runtime_use_autosuspend() call must be undone with
pm_runtime_dont_use_autosuspend() at driver exit, but this is not
currently handled in the driver.

To fix this issue and at the same time simplify error handling, switch
to devm_pm_runtime_enable(). It will call both pm_runtime_disable() and
pm_runtime_dont_use_autosuspend() during driver removal.

Fixes: 06f751b61329 ("crypto: allwinner - Add sun8i-ce Crypto Engine")
Signed-off-by: Ovidiu Panait <ovidiu.panait.oss at gmail.com>
---
 .../crypto/allwinner/sun8i-ce/sun8i-ce-core.c   | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
index ec1ffda9ea32..658f520cee0c 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
@@ -832,13 +832,12 @@ static int sun8i_ce_pm_init(struct sun8i_ce_dev *ce)
 	err = pm_runtime_set_suspended(ce->dev);
 	if (err)
 		return err;
-	pm_runtime_enable(ce->dev);
-	return err;
-}
 
-static void sun8i_ce_pm_exit(struct sun8i_ce_dev *ce)
-{
-	pm_runtime_disable(ce->dev);
+	err = devm_pm_runtime_enable(ce->dev);
+	if (err)
+		return err;
+
+	return 0;
 }
 
 static int sun8i_ce_get_clks(struct sun8i_ce_dev *ce)
@@ -1041,7 +1040,7 @@ static int sun8i_ce_probe(struct platform_device *pdev)
 			       "sun8i-ce-ns", ce);
 	if (err) {
 		dev_err(ce->dev, "Cannot request CryptoEngine Non-secure IRQ (err=%d)\n", err);
-		goto error_irq;
+		goto error_pm;
 	}
 
 	err = sun8i_ce_register_algs(ce);
@@ -1082,8 +1081,6 @@ static int sun8i_ce_probe(struct platform_device *pdev)
 	return 0;
 error_alg:
 	sun8i_ce_unregister_algs(ce);
-error_irq:
-	sun8i_ce_pm_exit(ce);
 error_pm:
 	sun8i_ce_free_chanlist(ce, MAXFLOW - 1);
 	return err;
@@ -1104,8 +1101,6 @@ static void sun8i_ce_remove(struct platform_device *pdev)
 #endif
 
 	sun8i_ce_free_chanlist(ce, MAXFLOW - 1);
-
-	sun8i_ce_pm_exit(ce);
 }
 
 static const struct of_device_id sun8i_ce_crypto_of_match_table[] = {
-- 
2.48.1