[PATCH] PCI: mediatek-gen3: prevent leaking IRQ domains when IRQ not found

[Chen-Yu Tsai]

In mtk_pcie_setup_irq(), the IRQ domains are allocated before the
controller's IRQ is fetched. If the latter fails the function
directly returns an error.

Instead, reverse the order so that the IRQ domains are allocated
after the controller's IRQ is found.

This was flagged by Sashiko during a review of "[PATCH v6 0/7] PCI:
mediatek-gen3: add power control support".

Link: https://sashiko.dev/#/patchset/20260324052002.4072430-1-wenst%40chromium.org
Fixes: 814cceebba9b ("PCI: mediatek-gen3: Add INTx support")
Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>
---
This was flagged by Sashiko during a review of "[PATCH v6 0/7] PCI:
mediatek-gen3: add power control support", but is otherwise unrelated
to that series and can be merged independently.

 drivers/pci/controller/pcie-mediatek-gen3.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index a94fdbaf47fe..2f9365930d6a 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -890,14 +890,14 @@ static int mtk_pcie_setup_irq(struct mtk_gen3_pcie *pcie)
 	struct platform_device *pdev = to_platform_device(dev);
 	int err;
 
-	err = mtk_pcie_init_irq_domains(pcie);
-	if (err)
-		return err;
-
 	pcie->irq = platform_get_irq(pdev, 0);
 	if (pcie->irq < 0)
 		return pcie->irq;
 
+	err = mtk_pcie_init_irq_domains(pcie);
+	if (err)
+		return err;
+
 	irq_set_chained_handler_and_data(pcie->irq, mtk_pcie_irq_handler, pcie);
 
 	return 0;
-- 
2.53.0.983.g0bb29b3bc5-goog