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pci: Disable expansion ROM address decoding when signature check fails

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We should not leave the expansion ROM address window open when there
is not a valid ROM.

Suggested-by: Matt Porter <mporter@konsulko.com>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2015-07-08 13:06:41 +08:00 committed by Simon Glass
parent 6c89663cb1
commit f110da9984
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/pci_rom.c
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@ -104,6 +104,10 @@ static int pci_rom_probe(pci_dev_t dev, uint class,
if (le16_to_cpu(rom_header->signature) != PCI_ROM_HDR) {
printf("Incorrect expansion ROM header signature %04x\n",
le16_to_cpu(rom_header->signature));
#ifndef CONFIG_VGA_BIOS_ADDR
/* Disable expansion ROM address decoding */
pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address);
#endif
return -EINVAL;
}