Reviewed-by: Liming Gao
> -邮件原件-
> 发件人: devel@edk2.groups.io 代表 Nhi Pham via
> groups.io
> 发送时间: 2023年8月21日 11:41
> 收件人: devel@edk2.groups.io
> 抄送: Nhi Pham ; Jian J Wang
> ; Liming Gao ; Hao A
> Wu
> 主题: [ ** SPAMMAIL ** ][edk2-devel] [PATCH 1/1]
> MdeModulePkg/PciBusDxe: Fix boot hang with faulty PCI Option ROM
>
> A faulty PCI device has the Option ROM image size set to 0. UEFI reads
> two headers PCI_EXPANSION_ROM_HEADER and PCI_DATA_STRUCTURE to
> get the
> Option ROM information. Because the image size is 0, the Option ROM
> header address never changes. As a result, UEFI keeps reading the same
> two headers definitely. This patch is intended to fix it.
>
> Cc: Jian J Wang
> Cc: Liming Gao
> Cc: Hao A Wu
> Signed-off-by: Nhi Pham
> ---
> MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
> b/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
> index 89f5f64101a5..bd5ace18f6e4 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
> @@ -506,13 +506,13 @@ LoadOpRomImage (
> Indicator= RomPcir->Indicator;
>
> RomImageSize = RomImageSize + RomPcir->ImageLength * 512;
>
> RomBarOffset = RomBarOffset + RomPcir->ImageLength * 512;
>
> - } while (((Indicator & 0x80) == 0x00) && ((RomBarOffset - RomBar) <
> RomSize));
>
> + } while (((Indicator & 0x80) == 0x00) && ((RomBarOffset - RomBar) <
> RomSize) && (RomImageSize > 0));
>
>
>
>//
>
>// Some Legacy Cards do not report the correct ImageLength so used the
> maximum
>
>// of the legacy length and the PCIR Image Length
>
>//
>
> - if (CodeType == PCI_CODE_TYPE_PCAT_IMAGE) {
>
> + if ((RomImageSize > 0) && (CodeType == PCI_CODE_TYPE_PCAT_IMAGE))
> {
>
> RomImageSize = MAX (RomImageSize, LegacyImageLength);
>
>}
>
>
>
> --
> 2.25.1
>
>
>
>
>
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