On 04/03/2020 21:22, Nikita Leshenko wrote:
> Used to identify the individual disks in the hardware tree
>
> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2390
> Signed-off-by: Nikita Leshenko <nikita.leshchenko@oracle.com>
> ---
> OvmfPkg/MptScsiDxe/MptScsi.c | 29 ++++++++++++++++++++++++++++-
> 1 file changed, 28 insertions(+), 1 deletion(-)
>
> diff --git a/OvmfPkg/MptScsiDxe/MptScsi.c b/OvmfPkg/MptScsiDxe/MptScsi.c
> index e898a6024f73..cba564b5f648 100644
> --- a/OvmfPkg/MptScsiDxe/MptScsi.c
> +++ b/OvmfPkg/MptScsiDxe/MptScsi.c
> @@ -129,7 +129,34 @@ MptScsiBuildDevicePath (
> IN OUT EFI_DEVICE_PATH_PROTOCOL **DevicePath
> )
> {
> - return EFI_UNSUPPORTED;
> + SCSI_DEVICE_PATH *ScsiDevicePath;
> +
> + if (DevicePath == NULL) {
> + return EFI_INVALID_PARAMETER;
> + }
> +
> + //
> + // This device support 256 targets only, so it's enough to dereference
> + // the LSB of Target.
> + //
> + if (*Target > 0 || Lun > 0) {
> + return EFI_NOT_FOUND;
> + }
> +
> + ScsiDevicePath = AllocateZeroPool (sizeof (*ScsiDevicePath));
Nit: It should also be sufficient to use AllocatePool() as below
overrides all fields of SCSI_DEVICE_PATH.
Reviewed-by: Liran Alon <liran.alon@oracle.com>
> + if (ScsiDevicePath == NULL) {
> + return EFI_OUT_OF_RESOURCES;
> + }
> +
> + ScsiDevicePath->Header.Type = MESSAGING_DEVICE_PATH;
> + ScsiDevicePath->Header.SubType = MSG_SCSI_DP;
> + ScsiDevicePath->Header.Length[0] = (UINT8)sizeof (*ScsiDevicePath);
> + ScsiDevicePath->Header.Length[1] = (UINT8)(sizeof (*ScsiDevicePath) >> 8);
> + ScsiDevicePath->Pun = *Target;
> + ScsiDevicePath->Lun = (UINT16)Lun;
> +
> + *DevicePath = &ScsiDevicePath->Header;
> + return EFI_SUCCESS;
> }
>
> STATIC
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