diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c
index eea5a0f3b959..63513968f561 100644
--- a/arch/x86/pci/intel_mid_pci.c
+++ b/arch/x86/pci/intel_mid_pci.c
@@ -223,9 +223,9 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev)
 		return 0;
 
 	ret = pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &gsi);
-	if (ret < 0) {
+	if (ret) {
 		dev_warn(&dev->dev, "Failed to read interrupt line: %d\n", ret);
-		return ret;
+		return pcibios_err_to_errno(ret);
 	}
 
 	switch (intel_mid_identify_cpu()) {