RE: [PATCH] scsi: ufs: core: call hibern8 notify when hibern8 cmd failed

["Fang Hongjie(方洪杰)" <hongjiefang@asrmicro.com>]

> From: Bart Van Assche [mailto:bvanassche@acm.org]
> Sent: Saturday, April 25, 2026 7:01 AM
> To: Fang Hongjie <hongjiefang@asrmicro.com>;
> alim.akhtar@samsung.com; avri.altman@wdc.com;
> martin.petersen@oracle.com; James.Bottomley@HansenPartnership.com
> Cc: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH] scsi: ufs: core: call hibern8 notify when hibern8 cmd
> failed
> 
> On 4/22/26 12:21 AM, Hongjie Fang wrote:
> > The vendor hibern8 notify callback always can be executed in the
> > PRE_CHANGE phase of hibern8 enter/exit. But it cannot be executed
> > in the POST_CHANGE phase if the hibern8 cmd fails.
> >
> > When the hibern8 cmd fails, the vendor hibern8 notify callback
> > should still have the opportunity to execute.
> >
> > Signed-off-by: Hongjie Fang <hongjiefang@asrmicro.com>
> > ---
> >   drivers/ufs/core/ufshcd.c | 9 ++++-----
> >   1 file changed, 4 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
> > index 9ceb6d6d479d..02091e72f8db 100644
> > --- a/drivers/ufs/core/ufshcd.c
> > +++ b/drivers/ufs/core/ufshcd.c
> > @@ -4500,9 +4500,8 @@ int ufshcd_uic_hibern8_enter(struct ufs_hba
> *hba)
> >   	if (ret)
> >   		dev_err(hba->dev, "%s: hibern8 enter failed. ret = %d\n",
> >   			__func__, ret);
> > -	else
> > -		ufshcd_vops_hibern8_notify(hba,
> UIC_CMD_DME_HIBER_ENTER,
> > -
> 	POST_CHANGE);
> > +
> > +	ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_ENTER,
> POST_CHANGE);
> >
> >   	return ret;
> >   }
> > @@ -4526,12 +4525,12 @@ int ufshcd_uic_hibern8_exit(struct ufs_hba
> *hba)
> >   		dev_err(hba->dev, "%s: hibern8 exit failed. ret = %d\n",
> >   			__func__, ret);
> >   	} else {
> > -		ufshcd_vops_hibern8_notify(hba,
> UIC_CMD_DME_HIBER_EXIT,
> > -
> 	POST_CHANGE);
> >   		hba->ufs_stats.last_hibern8_exit_tstamp = local_clock();
> >   		hba->ufs_stats.hibern8_exit_cnt++;
> >   	}
> >
> > +	ufshcd_vops_hibern8_notify(hba, UIC_CMD_DME_HIBER_EXIT,
> POST_CHANGE);
> > +
> >   	return ret;
> >   }
> >   EXPORT_SYMBOL_GPL(ufshcd_uic_hibern8_exit);
> 
> This change may break existing hibern8_notify() implementations. Please
> add a new argument to ufshcd_vops_hibern8_notify() that represents
> whether or not the operation succeeded for POST_CHANGE callbacks.
> 

Okay, I’ll modify the patch accordingly.

> Thanks,
> 
> Bart.

Best.