diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 95d7a5fb8ffc544268eea9d2a3f2f49ec2820be1..b67bff0bd40dfbecae05a1943c38f3839e0c5df2 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1690,7 +1690,7 @@ int pci_setup_device(struct pci_dev *dev)
 	/* Device class may be changed after fixup */
 	class = dev->class >> 8;
 
-	if (dev->non_compliant_bars) {
+	if (dev->non_compliant_bars && !dev->mmio_always_on) {
 		pci_read_config_word(dev, PCI_COMMAND, &cmd);
 		if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
 			pci_info(dev, "device has non-compliant BARs; disabling IO/MEM decoding\n");