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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250501190651.3863582-1-ovidiu.panait.oss@gmail.com>
Date: Thu,  1 May 2025 22:06:50 +0300
From: Ovidiu Panait <ovidiu.panait.oss@...il.com>
To: clabbe.montjoie@...il.com,
	herbert@...dor.apana.org.au,
	davem@...emloft.net,
	linux-crypto@...r.kernel.org
Cc: wens@...e.org,
	jernej.skrabec@...il.com,
	samuel@...lland.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Ovidiu Panait <ovidiu.panait.oss@...il.com>
Subject: [PATCH 1/2] crypto: sun8i-ce: undo runtime PM changes during driver removal

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@...il.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