Really sorry,
After referring to the Information Technology - AT Attachment with Packet
Interface (ATA/ATAPI) Specification,
It seems to me that the commands being executed in function
SetDriveParameters() are not mandatory during device initialization.
1. INITIALIZE DEVICE PARAMETERS command (ID 0x91h):
This command got obsoleted since ATA/ATAPI-6 spec version.
Also, the return status of SetDriveParameters() is irrelevant with the
execution result of this command.
2. SET MULTIPLE MODE command (ID 0xC6h):
My take is that this command is necessary if there is subsequent usage of
command READ MULTIPLE, READ MULTIPLE EXT, WRITE MULTIPLE, or WRITE MULTIPLE EXT.
I do not find usage of the above 4 commands within edk2, so I think the
successful execution of SET MULTIPLE MODE command is not mandatory for
detecting hard disk device.
Based on the above findings, could you help to update the patch to:
Status = SetDriveParameters (Instance, IdeChannel, IdeDevice,
&DriveParameters, NULL);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_WARN, "Set Drive Parameters Fail, Status = %r\n",
Status));
}
Will doing so still please Coverity?
Best Regards,
Hao Wu
> -----Original Message-----
> From: Ranbir Singh <rsi...@ventanamicro.com>
> Sent: Friday, June 9, 2023 8:33 PM
> To: devel@edk2.groups.io; rsi...@ventanamicro.com
> Cc: Wu, Hao A <hao.a...@intel.com>; Ni, Ray <ray...@intel.com>
> Subject: [PATCH v2 2/2] MdeModulePkg/Bus/Ata/AtaAtapiPassThru: Fix
> UNUSED_VALUE Coverity issue
>
> From: Ranbir Singh <ranbir.sin...@dell.com>
>
> The return value stored in Status after call to SetDriveParameters
> is not made of any use thereafter and hence it remains as UNUSED.
>
> Add error check as is done after calls to SetDeviceTransferMode.
>
> Cc: Hao A Wu <hao.a...@intel.com>
> Cc: Ray Ni <ray...@intel.com>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4204
> Signed-off-by: Ranbir Singh <ranbir.sin...@dell.com>
> Signed-off-by: Ranbir Singh <rsi...@ventanamicro.com>
> ---
>
> Notes:
> Add error check instead of Status storage removal
>
> MdeModulePkg/Bus/Ata/AtaAtapiPassThru/IdeMode.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/IdeMode.c
> b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/IdeMode.c
> index 75403886e44a..d04b1d95a7f5 100644
> --- a/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/IdeMode.c
> +++ b/MdeModulePkg/Bus/Ata/AtaAtapiPassThru/IdeMode.c
> @@ -2549,13 +2549,18 @@ DetectAndConfigIdeDevice (
> //
>
> if (DeviceType == EfiIdeHarddisk) {
>
> //
>
> - // Init driver parameters
>
> + // Init drive parameters
>
> //
>
> DriveParameters.Sector = (UINT8)((ATA5_IDENTIFY_DATA
> *)(&Buffer.AtaData))->sectors_per_track;
>
> DriveParameters.Heads = (UINT8)(((ATA5_IDENTIFY_DATA
> *)(&Buffer.AtaData))->heads - 1);
>
> DriveParameters.MultipleSector = (UINT8)((ATA5_IDENTIFY_DATA
> *)(&Buffer.AtaData))->multi_sector_cmd_max_sct_cnt;
>
>
>
> Status = SetDriveParameters (Instance, IdeChannel, IdeDevice,
> &DriveParameters, NULL);
>
> +
>
> + if (EFI_ERROR (Status)) {
>
> + DEBUG ((DEBUG_ERROR, "Set Drive Parameters Fail, Status = %r\n",
> Status));
>
> + continue;
>
> + }
>
> }
>
>
>
> //
>
> --
> 2.34.1
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#106844): https://edk2.groups.io/g/devel/message/106844
Mute This Topic: https://groups.io/mt/99432080/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
