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pci: Fix showing bars

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Header type is 7-bit number so properly clear upper 8th bit which
indicates multifunction device.

And do not try to show bars for unsupported header types.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2021-10-07 14:51:00 +02:00 committed by Tom Rini
parent c7cd6f734b
commit e6335d3eaa
1 changed files with 5 additions and 0 deletions
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5
cmd/pci.c
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@ -71,10 +71,15 @@ static int pci_bar_show(struct udevice *dev)
int prefetchable;
dm_pci_read_config8(dev, PCI_HEADER_TYPE, &header_type);
header_type &= 0x7f;
if (header_type == PCI_HEADER_TYPE_CARDBUS) {
printf("CardBus doesn't support BARs\n");
return -ENOSYS;
} else if (header_type != PCI_HEADER_TYPE_NORMAL &&
header_type != PCI_HEADER_TYPE_BRIDGE) {
printf("unknown header type\n");
return -ENOSYS;
}
bar_cnt = (header_type == PCI_HEADER_TYPE_NORMAL) ? 6 : 2;