RE: [PATCH v3] scsi: ufs: Allow RTT negotiation

[Avri Altman]

> On 5/13/24 23:08, Avri Altman wrote:
> > +/* bMaxNumOfRTT is equal to two after device manufacturing */
> > +#define DEFAULT_MAX_NUM_RTT 2
> > [ ... ]
> > +     /* do not override if it was already written */
> > +     if (dev_rtt != DEFAULT_MAX_NUM_RTT)
> > +             return;
> 
> I haven't found any text in the UFSHCI 4.0 specification that says
> that the default value for the number of outstanding RTT requests
> should be 2. Did I perhaps overlook something? If I didn't overlook
> anything, the driver should not try to check whether dev_rtt is at its
> default value.
JEDEC Standard No. 220F Page 150 Line 2837 says: "bMaxNumOfRTT is equal to two after device manufacturing,"

Thanks,
Avri

> 
> Thanks,
> 
> Bart.