[PATCH v5 1/3] scsi: ufs: core: Fix mcq tag calcualtion

[Stanley Chu]

Hi Po-Wen,

Po-Wen Kao <powen.kao at mediatek.com> 於 2023年4月24日 週一 下午10:13寫道：
>
> Transfer command descriptor is allocated in ufshcd_memory_alloc()
> and referenced by transfer request descriptor with stride size
> sizeof_utp_transfer_cmd_desc()
> instead of
> sizeof(struct utp_transfer_cmd_desc).
>
> Consequently, computing tag by address offset should also refer to the
> same stride.
>
> Signed-off-by: Po-Wen Kao <powen.kao at mediatek.com>
> Reviewed-by: Bart Van Assche <bvanassche at acm.org>
> Reviewed-by: Manivannan Sadhasivam <mani at kernel.org>
> Reviewed-by: Stanley Chu <stanley.chu at mediatek.com>
> Reviewed-by: Ziqi Chen <quic_ziqichen at quicinc.com>
> ---
>  drivers/ufs/core/ufs-mcq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/ufs/core/ufs-mcq.c b/drivers/ufs/core/ufs-mcq.c
> index 31df052fbc41..3a27fa4b0024 100644
> --- a/drivers/ufs/core/ufs-mcq.c
> +++ b/drivers/ufs/core/ufs-mcq.c
> @@ -265,7 +265,7 @@ static int ufshcd_mcq_get_tag(struct ufs_hba *hba,
>         addr = (le64_to_cpu(cqe->command_desc_base_addr) & CQE_UCD_BA) -
>                 hba->ucdl_dma_addr;
>
> -       return div_u64(addr, sizeof(struct utp_transfer_cmd_desc));
> +       return div_u64(addr, sizeof_utp_transfer_cmd_desc(hba));

Would you also need to consider the ufshcd_release_sdb_queue() case?

Thanks.
Stanley Chu