PCI: dra7xx: Fix error handling when IRQ request fails in probe

Commit d4c7d1a ("PCI: dwc: dra7xx: Push request_irq()
call to the bottom of probe") moved the IRQ request for
"dra7xx-pcie-main" towards the end of dra7xx_pcie_probe().

However, the error handling does not take into account the
initialization performed by either dra7xx_add_pcie_port() or
dra7xx_add_pcie_ep(), depending on the mode of operation.

Fix the error handling to address this.

Fixes: d4c7d1a ("PCI: dwc: dra7xx: Push request_irq() call to the bottom of probe")
Link: https://lore.kernel.org/linux-pci/[email protected]
Tested-by: Udit Kumar <[email protected]>
Signed-off-by: Siddharth Vadapalli <[email protected]>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: Kevin Hilman <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Cc: [email protected]

Author: Siddharth-Vadapalli-at-TI

drivers/pci/controller/dwc/pci-dra7xx.c

@@ -854,11 +854,17 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)
 					"dra7xx-pcie-main", dra7xx);
 	if (ret) {
 		dev_err(dev, "failed to request irq\n");
-		goto err_gpio;
+		goto err_deinit;
 	}
 
 	return 0;
 
+err_deinit:
+	if (dra7xx->mode == DW_PCIE_RC_TYPE)
+		dw_pcie_host_deinit(&dra7xx->pci->pp);
+	else
+		dw_pcie_ep_deinit(&dra7xx->pci->ep);
+
 err_gpio:
 err_get_sync:
 	pm_runtime_put(dev);