PCI: mediatek: Fix unchecked return value

[ Upstream commit 17a0a1e5 ]

Check return value of devm_pci_remap_iospace().

Addresses-Coverity-ID: 1471965 ("Unchecked return value")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Honghui Zhang <honghui.zhang@mediatek.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/pci/controller/pcie-mediatek.c

@@ -1120,7 +1120,9 @@ static int mtk_pcie_request_resources(struct mtk_pcie *pcie)
 	if (err < 0)
 		return err;
 
-	devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
+	err = devm_pci_remap_iospace(dev, &pcie->pio, pcie->io.start);
+	if (err)
+		return err;
 
 	return 0;
 }