linux-kernel - [PATCH 2/4] hwspinlock: omap: Use devm_pm_runtime

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Date: Tue, 23 Jan 2024 10:04:03 -0600
From: Andrew Davis <afd@...com>
To: Bjorn Andersson <andersson@...nel.org>,
        Baolin Wang
	<baolin.wang@...ux.alibaba.com>
CC: <linux-omap@...r.kernel.org>, <linux-remoteproc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Andrew Davis <afd@...com>
Subject: [PATCH 2/4] hwspinlock: omap: Use devm_pm_runtime_enable() helper

This disables runtime PM on module exit, allowing us to simplify
the probe exit path and remove callbacks. Do that here.

Signed-off-by: Andrew Davis <afd@...com>
---
 drivers/hwspinlock/omap_hwspinlock.c | 26 ++++++++------------------
 1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c
index cca55143d24d4..2f18ea6c05e3f 100644
--- a/drivers/hwspinlock/omap_hwspinlock.c
+++ b/drivers/hwspinlock/omap_hwspinlock.c
@@ -89,10 +89,10 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
 	 * make sure the module is enabled and clocked before reading
 	 * the module SYSSTATUS register
 	 */
-	pm_runtime_enable(&pdev->dev);
+	devm_pm_runtime_enable(&pdev->dev);
 	ret = pm_runtime_resume_and_get(&pdev->dev);
 	if (ret < 0)
-		goto runtime_err;
+		return ret;
 
 	/* Determine number of locks */
 	i = readl(io_base + SYSSTATUS_OFFSET);
@@ -104,22 +104,18 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
 	 */
 	ret = pm_runtime_put(&pdev->dev);
 	if (ret < 0)
-		goto runtime_err;
+		return ret;
 
 	/* one of the four lsb's must be set, and nothing else */
-	if (hweight_long(i & 0xf) != 1 || i > 8) {
-		ret = -EINVAL;
-		goto runtime_err;
-	}
+	if (hweight_long(i & 0xf) != 1 || i > 8)
+		return -EINVAL;
 
 	num_locks = i * 32; /* actual number of locks in this device */
 
 	bank = devm_kzalloc(&pdev->dev, struct_size(bank, lock, num_locks),
 			    GFP_KERNEL);
-	if (!bank) {
-		ret = -ENOMEM;
-		goto runtime_err;
-	}
+	if (!bank)
+		return -ENOMEM;
 
 	platform_set_drvdata(pdev, bank);
 
@@ -129,16 +125,12 @@ static int omap_hwspinlock_probe(struct platform_device *pdev)
 	ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
 						base_id, num_locks);
 	if (ret)
-		goto runtime_err;
+		return ret;
 
 	dev_dbg(&pdev->dev, "Registered %d locks with HwSpinlock core\n",
 		num_locks);
 
 	return 0;
-
-runtime_err:
-	pm_runtime_disable(&pdev->dev);
-	return ret;
 }
 
 static void omap_hwspinlock_remove(struct platform_device *pdev)
@@ -151,8 +143,6 @@ static void omap_hwspinlock_remove(struct platform_device *pdev)
 		dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret);
 		return;
 	}
-
-	pm_runtime_disable(&pdev->dev);
 }
 
 static const struct of_device_id omap_hwspinlock_of_match[] = {
-- 
2.39.2