[PATCH v5 2/9] irqchip/imx-irqsteer: Use devm to manage the IRQ domain

[Zhipeng.wang_1 at oss.nxp.com]

From: Zhipeng Wang <zhipeng.wang_1 at nxp.com>

probe() creates the IRQ domain with irq_domain_create_linear() and only
tears it down on the remove() path. On the probe() error path after the
domain has been created (the fsl,num-irqs sanity check), the single
error label just calls clk_disable_unprepare() and returns, leaking the
freshly created domain. The domain-creation failure path happens to
share the same label correctly only because the domain is NULL there.

Create the domain with devm_irq_domain_instantiate() so it is removed
automatically on unbind and on any probe() failure after it has been
created. This fixes the leak on the sanity-check error path and lets
remove() drop its explicit irq_domain_remove().

Fixes: 28528fca4908 ("irqchip/imx-irqsteer: Add multi output interrupts support")
Signed-off-by: Zhipeng Wang <zhipeng.wang_1 at nxp.com>
---
 drivers/irqchip/irq-imx-irqsteer.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
index 1b8d0c8eedb9..c1df84551efa 100644
--- a/drivers/irqchip/irq-imx-irqsteer.c
+++ b/drivers/irqchip/irq-imx-irqsteer.c
@@ -237,11 +237,18 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
 	if (irqsteer_has_chanctrl(data->devtype_data))
 		writel_relaxed(BIT(data->channel), data->regs + CHANCTRL);
 
-	data->domain = irq_domain_create_linear(dev_fwnode(&pdev->dev), data->reg_num * 32,
-						&imx_irqsteer_domain_ops, data);
-	if (!data->domain) {
+	struct irq_domain_info info = {
+		.fwnode		= dev_fwnode(&pdev->dev),
+		.size		= data->reg_num * 32,
+		.hwirq_max	= data->reg_num * 32,
+		.ops		= &imx_irqsteer_domain_ops,
+		.host_data	= data,
+	};
+
+	data->domain = devm_irq_domain_instantiate(&pdev->dev, &info);
+	if (IS_ERR(data->domain)) {
 		dev_err(&pdev->dev, "failed to create IRQ domain\n");
-		ret = -ENOMEM;
+		ret = PTR_ERR(data->domain);
 		goto out;
 	}
 	irq_domain_set_pm_device(data->domain, &pdev->dev);
@@ -285,8 +292,6 @@ static void imx_irqsteer_remove(struct platform_device *pdev)
 						 NULL, NULL);
 	}
 
-	irq_domain_remove(irqsteer_data->domain);
-
 	clk_disable_unprepare(irqsteer_data->ipg_clk);
 }
 
-- 
2.34.1