linux-kernel - [PATCH 01/14] Input: samsung-keypad - switch to using devm_clk_get

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

Message-ID: <20240819045813.2154642-2-dmitry.torokhov@gmail.com>
Date: Sun, 18 Aug 2024 21:57:58 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Arnd Bergmann <arnd@...db.de>,
	Mark Brown <broonie@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>
Cc: linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	patches@...nsource.cirrus.com
Subject: [PATCH 01/14] Input: samsung-keypad - switch to using devm_clk_get_prepared()

Switch to using devm_clk_get_prepared() instead of combining
devm_clk_get() with clk_prepare(), which simplifies the code and
ensures that the clock is unprepared at the right time relative to
releasing other managed resources.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/input/keyboard/samsung-keypad.c | 22 ++++------------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c
index e212eff7687c..a5fac7de8b5d 100644
--- a/drivers/input/keyboard/samsung-keypad.c
+++ b/drivers/input/keyboard/samsung-keypad.c
@@ -361,18 +361,12 @@ static int samsung_keypad_probe(struct platform_device *pdev)
 	if (!keypad->base)
 		return -EBUSY;
 
-	keypad->clk = devm_clk_get(&pdev->dev, "keypad");
+	keypad->clk = devm_clk_get_prepared(&pdev->dev, "keypad");
 	if (IS_ERR(keypad->clk)) {
 		dev_err(&pdev->dev, "failed to get keypad clk\n");
 		return PTR_ERR(keypad->clk);
 	}
 
-	error = clk_prepare(keypad->clk);
-	if (error) {
-		dev_err(&pdev->dev, "keypad clock prepare failed\n");
-		return error;
-	}
-
 	keypad->input_dev = input_dev;
 	keypad->pdev = pdev;
 	keypad->row_shift = row_shift;
@@ -399,7 +393,7 @@ static int samsung_keypad_probe(struct platform_device *pdev)
 					   keypad->keycodes, input_dev);
 	if (error) {
 		dev_err(&pdev->dev, "failed to build keymap\n");
-		goto err_unprepare_clk;
+		return error;
 	}
 
 	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
@@ -411,7 +405,7 @@ static int samsung_keypad_probe(struct platform_device *pdev)
 	keypad->irq = platform_get_irq(pdev, 0);
 	if (keypad->irq < 0) {
 		error = keypad->irq;
-		goto err_unprepare_clk;
+		return error;
 	}
 
 	error = devm_request_threaded_irq(&pdev->dev, keypad->irq, NULL,
@@ -419,7 +413,7 @@ static int samsung_keypad_probe(struct platform_device *pdev)
 					  dev_name(&pdev->dev), keypad);
 	if (error) {
 		dev_err(&pdev->dev, "failed to register keypad interrupt\n");
-		goto err_unprepare_clk;
+		return error;
 	}
 
 	device_init_wakeup(&pdev->dev, pdata->wakeup);
@@ -439,20 +433,12 @@ static int samsung_keypad_probe(struct platform_device *pdev)
 
 err_disable_runtime_pm:
 	pm_runtime_disable(&pdev->dev);
-err_unprepare_clk:
-	clk_unprepare(keypad->clk);
 	return error;
 }
 
 static void samsung_keypad_remove(struct platform_device *pdev)
 {
-	struct samsung_keypad *keypad = platform_get_drvdata(pdev);
-
 	pm_runtime_disable(&pdev->dev);
-
-	input_unregister_device(keypad->input_dev);
-
-	clk_unprepare(keypad->clk);
 }
 
 static int samsung_keypad_runtime_suspend(struct device *dev)
-- 
2.46.0.184.g6999bdac58-goog