pci: When disabling pref MEM set all base bits

It is common to set all base address bits to one and all limit address bits
to zero for disabling address forwarding. Forwarding is disabled when base
address is higher than limit address, so this change should not have any
effect.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c
index 6e5ed19..c0acf33 100644 (file)
--- a/drivers/pci/pci_auto.c
+++ b/drivers/pci/pci_auto.c
@@ -243,7 +243,7 @@ void dm_pciauto_prescan_setup_bridge(struct udevice *dev, int sub_bus)
                cmdstat |= PCI_COMMAND_MEMORY;
        } else {
                /* We don't support prefetchable memory for now, so disable */
-               dm_pci_write_config16(dev, PCI_PREF_MEMORY_BASE, 0x1000 |
+               dm_pci_write_config16(dev, PCI_PREF_MEMORY_BASE, 0xfff0 |
                                                                prefechable_64);
                dm_pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, 0x0 |
                                                                prefechable_64);