Re: [PATCH v1 1/3] usb: typec: ucsi: Limit read size on v1.2

[Heikki Krogerus]

On Wed, Jan 24, 2024 at 12:12:26AM -0800, Prashant Malani wrote:
> Hi Abhishek,
> 
> On Tue, Jan 23, 2024 at 2:30 PM Abhishek Pandit-Subedi
> <abhishekpandit@xxxxxxxxxx> wrote:
> >
> > From: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
> >
> > Between UCSI 1.2 and UCSI 2.0, the size of the MESSAGE_IN region was
> > increased from 16 to 256. In order to avoid overflowing reads for older
> > systems, add a mechanism to use the read UCSI version to truncate read
> > sizes on UCSI v1.2.
> >
> > Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
> I have one nit (mentioned in side-band but reproducing here for consistency),
> but will defer to the maintainer on that.
> 
> The above notwithstanding, FWIW:
> Reviewed-by: Prashant Malani<pmalani@xxxxxxxxxxxx>
> 
> > @@ -1556,6 +1569,15 @@ int ucsi_register(struct ucsi *ucsi)
> >         if (!ucsi->version)
> >                 return -ENODEV;
> >
> > +       /*
> > +        * Version format is JJ.M.N (JJ = Major version, M = Minor version,
> > +        * N = sub-minor version).
> > +        */
> > +       dev_info(ucsi->dev, "Registered UCSI interface with version %x.%x.%x",
> > +                UCSI_BCD_GET_MAJOR(ucsi->version),
> > +                UCSI_BCD_GET_MINOR(ucsi->version),
> > +                UCSI_BCD_GET_SUBMINOR(ucsi->version));
> 
> nit: I think this doesn't need to be dev_info() and can be just
> dev_dbg(), but will
> defer to the maintainer.

I think that's okay.

Reviewewd-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>

-- 
heikki