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PCI: fix bad bugs in bridge setup code 

Add the required brackets, so that we don't write unused registers
with potentially bogus values.

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 2015-03-13 11:28:04 +01:00 committed by Sascha Hauer
parent 5dd5884801
commit eab9e4cdd9
1 changed files with 4 additions and 2 deletions
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6
drivers/pci/pci.c
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@ -259,15 +259,17 @@ static void postscan_setup_bridge(struct pci_dev *dev)
/* limit subordinate to last used bus number */
pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, bus_index - 1);
if (last_mem)
if (last_mem) {
last_mem = ALIGN(last_mem, SZ_1M);
pci_write_config_word(dev, PCI_MEMORY_LIMIT,
((last_mem - 1) & 0xfff00000) >> 16);
}
if (last_mem_pref)
if (last_mem_pref) {
last_mem_pref = ALIGN(last_mem_pref, SZ_1M);
pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT,
((last_mem_pref - 1) & 0xfff00000) >> 16);
}
if (last_io) {
last_io = ALIGN(last_io, SZ_4K);