PCI: endpoint: Setting 64-bit/prefetch bit is invalid when IO is set

If flag PCI_BASE_ADDRESS_SPACE_IO is set, also having any
PCI_BASE_ADDRESS_MEM_* bit set is invalid.

This sanity check is done in pci_epc_set_bar(), so that we don't need
to do this sanity check in all epc->ops->set_bar() implementations.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>

drivers/pci/endpoint/pci-epc-core.c

@@ -309,10 +309,13 @@ int pci_epc_set_bar(struct pci_epc *epc, u8 func_no,
 {
 	int ret;
 	unsigned long irq_flags;
+	int flags = epf_bar->flags;
 
 	if (IS_ERR_OR_NULL(epc) || func_no >= epc->max_functions ||
 	    (epf_bar->barno == BAR_5 &&
-	     epf_bar->flags & PCI_BASE_ADDRESS_MEM_TYPE_64))
+	     flags & PCI_BASE_ADDRESS_MEM_TYPE_64) ||
+	    (flags & PCI_BASE_ADDRESS_SPACE_IO &&
+	     flags & PCI_BASE_ADDRESS_IO_MASK))
 		return -EINVAL;
 
 	if (!epc->ops->set_bar)