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PCI: align address range before scanning bridge 

Otherwise we may end up with a too low base address and push
requests for the upstream bus onto the downstream side.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Lucas Stach 2016-11-01 09:58:53 +01:00 committed by Sascha Hauer
parent 9c29edf10b
commit 18ee9aade8
1 changed files with 3 additions and 0 deletions
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3
drivers/pci/pci.c
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@ -252,6 +252,7 @@ static void prescan_setup_bridge(struct pci_dev *dev)
if (last_mem) {
/* Set up memory and I/O filter limits, assume 32-bit I/O space */
last_mem = ALIGN(last_mem, SZ_1M);
pci_write_config_word(dev, PCI_MEMORY_BASE,
(last_mem & 0xfff00000) >> 16);
cmdstat |= PCI_COMMAND_MEMORY;
@ -259,6 +260,7 @@ static void prescan_setup_bridge(struct pci_dev *dev)
if (last_mem_pref) {
/* Set up memory and I/O filter limits, assume 32-bit I/O space */
last_mem_pref = ALIGN(last_mem_pref, SZ_1M);
pci_write_config_word(dev, PCI_PREF_MEMORY_BASE,
(last_mem_pref & 0xfff00000) >> 16);
cmdstat |= PCI_COMMAND_MEMORY;
@ -270,6 +272,7 @@ static void prescan_setup_bridge(struct pci_dev *dev)
}
if (last_io) {
last_io = ALIGN(last_io, SZ_4K);
pci_write_config_byte(dev, PCI_IO_BASE,
(last_io & 0x0000f000) >> 8);
pci_write_config_word(dev, PCI_IO_BASE_UPPER16,