Re: [PATCH] scsi: ufs: check link active or not after switch to HS mode

[Zang Leigang]

On Wed, Jun 28, 2017 at 04:48:21PM -0700, Subhash Jadavani wrote:
> On 2017-06-24 04:44, Zang Leigang wrote:
> >Some device can successfully link and switch to HS mode. But failed
> >to do more. ufshcd_verify_dev_init can help to find this earlier.
> >
> >Signed-off-by: Zang Leigang 
> >
> >diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> >index ffe8d8608818..eb03388fc4bd 100644
> >--- a/drivers/scsi/ufs/ufshcd.c
> >+++ b/drivers/scsi/ufs/ufshcd.c
> >@@ -6373,6 +6373,14 @@ static int ufshcd_probe_hba(struct ufs_hba *hba)
> > __func__, ret);
> > goto out;
> > }
> >+
> >+/*
> >+ * Some device lost link after switch to HS mode. Check if
> >+ * connect is established here.
> >+ */
> 
> I have never across such failures. If this issue is limited to
> certain device vendors then I don't think if we want to do send NOP
> unconditionally for all the devices.
> We should probably add quirk for these failed devices and send NOP
> only for such devices.

I have double checked this issue, it's already fixed. This patch doesn't need
any more. Thanks.
> 
> 
> >+ret = ufshcd_verify_dev_init(hba);
> >+if (ret)
> >+goto out;
> > }
> >
> > /* set the state as operational after switching to desired gear */
> 
> -- 
> The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> a Linux Foundation Collaborative Project

-- 
Thanks,
Zang Leigang


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Re: [PATCH] scsi: ufs: check link active or not after switch to HS mode

[Subhash Jadavani]

On 2017-06-24 04:44, Zang Leigang wrote:

Some device can successfully link and switch to HS mode. But failed
to do more. ufshcd_verify_dev_init can help to find this earlier.

Signed-off-by: Zang Leigang 

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ffe8d8608818..eb03388fc4bd 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6373,6 +6373,14 @@ static int ufshcd_probe_hba(struct ufs_hba *hba)
__func__, ret);
goto out;
}
+
+   /*
+* Some device lost link after switch to HS mode. Check if
+* connect is established here.
+*/


I have never across such failures. If this issue is limited to certain 
device vendors then I don't think if we want to do send NOP 
unconditionally for all the devices.
We should probably add quirk for these failed devices and send NOP only 
for such devices.




+   ret = ufshcd_verify_dev_init(hba);
+   if (ret)
+   goto out;
}

/* set the state as operational after switching to desired gear */


--
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

[PATCH] scsi: ufs: check link active or not after switch to HS mode

[Zang Leigang]

Some device can successfully link and switch to HS mode. But failed
to do more. ufshcd_verify_dev_init can help to find this earlier.

Signed-off-by: Zang Leigang 

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ffe8d8608818..eb03388fc4bd 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6373,6 +6373,14 @@ static int ufshcd_probe_hba(struct ufs_hba *hba)
__func__, ret);
goto out;
}
+
+   /*
+* Some device lost link after switch to HS mode. Check if
+* connect is established here.
+*/
+   ret = ufshcd_verify_dev_init(hba);
+   if (ret)
+   goto out;
}
 
/* set the state as operational after switching to desired gear */
-- 
2.13.0