[PATCH v3 1/2] irqchip/imx-irqsteer: Convert to devm_pm_runtime_enable()

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <festevam@nabladev.com>

imx_irqsteer_probe() enables runtime PM, but imx_irqsteer_remove() does
not disable it. Consequently, runtime PM remains enabled after unbinding
the device, and rebinding it triggers:

Unbalanced pm_runtime_enable!

Use devm_pm_runtime_enable() to automatically disable runtime PM when
the device is removed. Set up runtime PM before creating the IRQ domain
and registering chained handlers so that a failure cannot leave either
resource pointing at freed driver data.

Fixes: 4730d2233311 ("irqchip/imx-irqsteer: Add runtime PM support")
Signed-off-by: Fabio Estevam <festevam@nabladev.com>
---
Changes since v1:
- Move devm_pm_runtime_enable() prior to irq_domain_create_linear(). (Frank)

 drivers/irqchip/irq-imx-irqsteer.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
index 87b07f517be3..653e25115083 100644
--- a/drivers/irqchip/irq-imx-irqsteer.c
+++ b/drivers/irqchip/irq-imx-irqsteer.c
@@ -236,6 +236,11 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
 	if (irqsteer_has_chanctrl(data->devtype_data))
 		writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
 
+	pm_runtime_set_active(&pdev->dev);
+	ret = devm_pm_runtime_enable(&pdev->dev);
+	if (ret)
+		goto out;
+
 	data->domain = irq_domain_create_linear(dev_fwnode(&pdev->dev), data->reg_num * 32,
 						&imx_irqsteer_domain_ops, data);
 	if (!data->domain) {
@@ -262,9 +267,6 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, data);
 
-	pm_runtime_set_active(&pdev->dev);
-	pm_runtime_enable(&pdev->dev);
-
 	return 0;
 out:
 	clk_disable_unprepare(data->ipg_clk);
-- 
2.43.0