[PATCH v4 2/7] PCI: mediatek-gen3: Move mtk_pcie_setup_irq() out of mtk_pcie_setup()

[Chen-Yu Tsai <wenst@chromium.org>]

mtk_pcie_setup_irq() just sets up the IRQ domains for PCI INTx and MSI,
and chains them to the controller's interrupt. It's not really related
to the setup of the actual PCIe controller.

Move the mtk_pcie_setup_irq() call out of and before mtk_pcie_setup(),
and add a proper error message for when it fails. Reorder
mtk_pcie_irq_teardown() in the remove callback to follow. Also create
an error path in the probe function.

Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Link: https://lore.kernel.org/all/20260309215056.GA603013@bhelgaas/
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
Changes since v3:
- New patch
---
 drivers/pci/controller/pcie-mediatek-gen3.c | 25 ++++++++++++---------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c
index 1939cac995b5..04ae195d36c2 100644
--- a/drivers/pci/controller/pcie-mediatek-gen3.c
+++ b/drivers/pci/controller/pcie-mediatek-gen3.c
@@ -1152,10 +1152,6 @@ static int mtk_pcie_setup(struct mtk_gen3_pcie *pcie)
 	if (err)
 		goto err_setup;
 
-	err = mtk_pcie_setup_irq(pcie);
-	if (err)
-		goto err_setup;
-
 	return 0;
 
 err_setup:
@@ -1181,21 +1177,28 @@ static int mtk_pcie_probe(struct platform_device *pdev)
 	pcie->soc = device_get_match_data(dev);
 	platform_set_drvdata(pdev, pcie);
 
+	err = mtk_pcie_setup_irq(pcie);
+	if (err)
+		return dev_err_probe(dev, err, "Failed to setup IRQ domains\n");
+
 	err = mtk_pcie_setup(pcie);
 	if (err)
-		return err;
+		goto err_tear_down_irq;
 
 	host->ops = &mtk_pcie_ops;
 	host->sysdata = pcie;
 
 	err = pci_host_probe(host);
-	if (err) {
-		mtk_pcie_irq_teardown(pcie);
-		mtk_pcie_power_down(pcie);
-		return err;
-	}
+	if (err)
+		goto err_power_down_pcie;
 
 	return 0;
+
+err_power_down_pcie:
+	mtk_pcie_power_down(pcie);
+err_tear_down_irq:
+	mtk_pcie_irq_teardown(pcie);
+	return err;
 }
 
 static void mtk_pcie_remove(struct platform_device *pdev)
@@ -1208,8 +1211,8 @@ static void mtk_pcie_remove(struct platform_device *pdev)
 	pci_remove_root_bus(host->bus);
 	pci_unlock_rescan_remove();
 
-	mtk_pcie_irq_teardown(pcie);
 	mtk_pcie_power_down(pcie);
+	mtk_pcie_irq_teardown(pcie);
 }
 
 static void mtk_pcie_irq_save(struct mtk_gen3_pcie *pcie)
-- 
2.53.0.473.g4a7958ca14-goog