[PATCH v3 1/4] irqchip/imx-irqsteer: Fix error handling path in probe()

[Zhipeng.wang_1@oss.nxp.com]

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

If the fsl,num-irqs sanity check rejects the value after the IRQ domain
has already been created, probe() jumps to a single label that only calls
clk_disable_unprepare(), leaving the freshly created IRQ domain leaked.
The domain-creation failure path shares the same label, which is correct
only because the domain is NULL there.

Split the error path so that a failure after the domain has been created
removes it before disabling the clock, and a failure before that goes
straight to the clock cleanup.

Fixes: 28528fca4908 ("irqchip/imx-irqsteer: Add multi output interrupts support")
Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
---
Changes in v3:
 - New patch, split out of the single v2 patch. Fixes the irq_domain
   leak on the probe() error path reported by Sashiko AI on v2.

 drivers/irqchip/irq-imx-irqsteer.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/irq-imx-irqsteer.c b/drivers/irqchip/irq-imx-irqsteer.c
index 87b07f517be3..a2f0629b22a3 100644
--- a/drivers/irqchip/irq-imx-irqsteer.c
+++ b/drivers/irqchip/irq-imx-irqsteer.c
@@ -241,13 +241,13 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
 	if (!data->domain) {
 		dev_err(&pdev->dev, "failed to create IRQ domain\n");
 		ret = -ENOMEM;
-		goto out;
+		goto err_clk;
 	}
 	irq_domain_set_pm_device(data->domain, &pdev->dev);
 
 	if (!data->irq_count || data->irq_count > CHAN_MAX_OUTPUT_INT) {
 		ret = -EINVAL;
-		goto out;
+		goto err_domain;
 	}
 
 	for (i = 0; i < data->irq_count; i++) {
@@ -266,7 +266,10 @@ static int imx_irqsteer_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 
 	return 0;
-out:
+
+err_domain:
+	irq_domain_remove(data->domain);
+err_clk:
 	clk_disable_unprepare(data->ipg_clk);
 	return ret;
 }
-- 
2.34.1