Re: [PATCH 01/10] ufs: introduce setup_xfer_req callback.

[김기웅 <kwmad.kim@samsung.com>]

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Hi, Subhash

> On 2016-10-07 20:21, Kiwoong Kim wrote:
> > Some UFS host controller may need to configure some things before any
> > transfer request is issued.
> >
> > Signed-off-by: Kiwoong Kim <kwmad.kim@samsung.com>
> > ---
> >  drivers/scsi/ufs/ufshcd.c |    2 ++
> >  drivers/scsi/ufs/ufshcd.h |   10 ++++++++++
> >  2 files changed, 12 insertions(+)
> >
> > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> > index 05c7456..bb537db 100644
> > --- a/drivers/scsi/ufs/ufshcd.c
> > +++ b/drivers/scsi/ufs/ufshcd.c
> > @@ -1474,6 +1474,7 @@ static int ufshcd_queuecommand(struct Scsi_Host
> > *host, struct scsi_cmnd *cmd)
> >
> >  	/* issue command to the controller */
> >  	spin_lock_irqsave(hba->host->host_lock, flags);
> > +	ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false));
> >  	ufshcd_send_command(hba, tag);
> >  out_unlock:
> >  	spin_unlock_irqrestore(hba->host->host_lock, flags); @@ -1683,6
> > +1684,7 @@ static int ufshcd_exec_dev_cmd(struct ufs_hba *hba,
> >  	/* Make sure descriptors are ready before ringing the doorbell */
> >  	wmb();
> >  	spin_lock_irqsave(hba->host->host_lock, flags);
> > +	ufshcd_vops_setup_xfer_req(hba, tag, (lrbp->cmd ? true : false));
> >  	ufshcd_send_command(hba, tag);
> >  	spin_unlock_irqrestore(hba->host->host_lock, flags);
> >
> > diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
> > index 430bef1..f37e5a4 100644
> > --- a/drivers/scsi/ufs/ufshcd.h
> > +++ b/drivers/scsi/ufs/ufshcd.h
> > @@ -261,6 +261,8 @@ struct ufs_pwr_mode_info {
> >   * @pwr_change_notify: called before and after a power mode change
> >   *			is carried out to allow vendor spesific capabilities
> >   *			to be set.
> > + * @setup_xfer_req: called before any transfer request is issued
> > + *                  to set some things
> >   * @suspend: called during host controller PM callback
> >   * @resume: called during host controller PM callback
> >   * @dbg_register_dump: used to dump controller debug information @@
> > -283,6 +285,7 @@ struct ufs_hba_variant_ops {
> >  					enum ufs_notify_change_status status,
> >  					struct ufs_pa_layer_attr *,
> >  					struct ufs_pa_layer_attr *);
> > +	void	(*setup_xfer_req)(struct ufs_hba *, int, bool);
> >  	int     (*suspend)(struct ufs_hba *, enum ufs_pm_op);
> >  	int     (*resume)(struct ufs_hba *, enum ufs_pm_op);
> >  	void	(*dbg_register_dump)(struct ufs_hba *hba);
> > @@ -799,6 +802,13 @@ static inline int
> > ufshcd_vops_pwr_change_notify(struct ufs_hba *hba,
> >  	return -ENOTSUPP;
> >  }
> >
> > +static inline void ufshcd_vops_setup_xfer_req(struct ufs_hba *hba,
> > +int
> > tag,
> > +					bool is_cmd_not_null)
> 
> This might sound better: s/is_cmd_not_null/is_scsi_cmd  ?

Okay.

And I think mail threading may be not avaiable in my environment
modifying a title of original message.
I would fix this issue or submit each patch at a time.

Thank you.
Regards.

> 
> > +{
> > +	if (hba->vops && hba->vops->setup_xfer_req)
> > +		return hba->vops->setup_xfer_req(hba, tag,
> is_cmd_not_null); }
> > +
> >  static inline int ufshcd_vops_suspend(struct ufs_hba *hba, enum
> > ufs_pm_op op)  {
> >  	if (hba->vops && hba->vops->suspend)
> 
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