On Mon, Sep 03, 2018 at 01:33:13PM +0300, Avri Altman wrote:
> Do that in order to re-use its code if the task request and response
> UPIUs are given externally.
>
> Signed-off-by: Avri Altman <avri.altman@xxxxxxx>
> ---
> drivers/scsi/ufs/ufshcd.c | 35 ++++++++++++++++++++++++++---------
> 1 file changed, 26 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index d18832a..15be103 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -5599,6 +5599,7 @@ static int ufshcd_clear_tm_cmd(struct ufs_hba *hba, int tag)
> }
>
> static void ufshcd_fill_tm_req(struct utp_task_req_desc *task_req_descp,
> + struct utp_upiu_task_req *raw_task_req_upiup,
> int lun_id, int task_id, u8 tm_function,
> int task_tag)
> {
> @@ -5609,6 +5610,13 @@ static void ufshcd_fill_tm_req(struct utp_task_req_desc *task_req_descp,
> task_req_descp->header.dword_2 =
> cpu_to_le32(OCS_INVALID_COMMAND_STATUS);
>
> + if (raw_task_req_upiup) {
> + raw_task_req_upiup->header.dword_0 |= cpu_to_be32(task_tag);
> + memcpy(task_req_descp->task_req_upiu, raw_task_req_upiup,
> + GENERAL_UPIU_REQUEST_SIZE);
> + return;
> + }
The only thing actually shared here is initializing two fields. Why
can't we always pass in the a raw
> +static int ufshcd_issue_tm_cmd(struct ufs_hba *hba,
> + struct utp_upiu_task_req *raw_task_req_upiup,
> + struct utp_upiu_task_req *raw_task_rsp_upiup,
> + int lun_id, int task_id, u8 tm_function,
> + u8 *tm_response)
> {
And the architecture here seems similar odd. I think someone needs
to untangle how the data structures are used in this part of the code.
E.g. aways prepare a raw structure in the caller (possibly on stack)
and pass it into ufshcd_issue_tm_cmd, which copies it into the
DMAable region.
