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Date:   Fri, 20 Nov 2020 09:56:25 +0200
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <gregkh@...uxfoundation.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH 2/2] uio: uio_dmem_genirq: finalize conversion of probe to devm_ handlers

This moves move pm_runtime_disable on a devm_add_action_or_reset() handler.
And with the use of the devm_uio_register_device() function, the remove
hook is no longer required.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 drivers/uio/uio_dmem_genirq.c | 28 ++++++++++------------------
 1 file changed, 10 insertions(+), 18 deletions(-)

diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index 72aa372d6ba6..6b5cfa5b0673 100644
--- a/drivers/uio/uio_dmem_genirq.c
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -143,6 +143,13 @@ static int uio_dmem_genirq_irqcontrol(struct uio_info *dev_info, s32 irq_on)
 	return 0;
 }
 
+static void uio_dmem_genirq_pm_disable(void *data)
+{
+	struct device *dev = data;
+
+	pm_runtime_disable(dev);
+}
+
 static int uio_dmem_genirq_probe(struct platform_device *pdev)
 {
 	struct uio_dmem_genirq_pdata *pdata = dev_get_platdata(&pdev->dev);
@@ -280,25 +287,11 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev)
 	 */
 	pm_runtime_enable(&pdev->dev);
 
-	ret = uio_register_device(&pdev->dev, priv->uioinfo);
-	if (ret) {
-		dev_err(&pdev->dev, "unable to register uio device\n");
-		pm_runtime_disable(&pdev->dev);
+	ret = devm_add_action_or_reset(&pdev->dev, uio_dmem_genirq_pm_disable, &pdev->dev);
+	if (ret)
 		return ret;
-	}
-
-	platform_set_drvdata(pdev, priv);
-	return 0;
-}
-
-static int uio_dmem_genirq_remove(struct platform_device *pdev)
-{
-	struct uio_dmem_genirq_platdata *priv = platform_get_drvdata(pdev);
-
-	uio_unregister_device(priv->uioinfo);
-	pm_runtime_disable(&pdev->dev);
 
-	return 0;
+	return devm_uio_register_device(&pdev->dev, priv->uioinfo);
 }
 
 static int uio_dmem_genirq_runtime_nop(struct device *dev)
@@ -332,7 +325,6 @@ MODULE_DEVICE_TABLE(of, uio_of_genirq_match);
 
 static struct platform_driver uio_dmem_genirq = {
 	.probe = uio_dmem_genirq_probe,
-	.remove = uio_dmem_genirq_remove,
 	.driver = {
 		.name = DRIVER_NAME,
 		.pm = &uio_dmem_genirq_dev_pm_ops,
-- 
2.27.0

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