RE: [PATCH 10/21] ufs: Remove ufshcd_valid_tag()

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> 
> On 7/4/21 11:46 PM, Avri Altman wrote:
> >> scsi_add_host() allocates shost->can_queue tags. ufshcd_init() sets
> >> shost->can_queue to hba->nutrs. In other words, we know that tag values
> >> will be in the range [0, hba->nutrs). Hence remove the checks that
> >> verify that blk_get_request() returns a tag in this range. This check
> >> was introduced by commit 14497328b6a6 ("scsi: ufs: verify command tag
> >> validity").
> >>
> >> Cc: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
> >> Cc: Avri Altman <avri.altman@xxxxxxx>
> >> Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
> >
> >>  static int ufshcd_abort(struct scsi_cmnd *cmd)
> >>  {
> >> -       struct Scsi_Host *host;
> >> -       struct ufs_hba *hba;
> >> +       struct Scsi_Host *host = cmd->device->host;
> >> +       struct ufs_hba *hba = shost_priv(host);
> >> +       unsigned int tag = cmd->request->tag;
> >> +       struct ufshcd_lrb *lrbp = &hba->lrb[tag];
> >>         unsigned long flags;
> >> -       unsigned int tag;
> >>         int err = 0;
> >> -       struct ufshcd_lrb *lrbp;
> >>         u32 reg;
> >>
> >> -       host = cmd->device->host;
> >> -       hba = shost_priv(host);
> >> -       tag = cmd->request->tag;
> >> -       lrbp = &hba->lrb[tag];
> > lrbp is used below ?
> > if (lrbp->lun == UFS_UPIU_UFS_DEVICE_WLUN) ...
> 
> Hi Avri,
> 
> The lrbp assignment is preserved but it has been moved up to the
> declaration block.
Missed that - sorry.

Avri

> Bart.




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