Re: [RFC PATCH 4/5] net: dsa: implement vtu_getnext and vtu_loadpurge for mv88e6250

[Andrew Lunn]

On Wed, May 01, 2019 at 07:32:13PM +0000, Rasmus Villemoes wrote:
> These are almost identical to the 6185 variants, but have fewer bits
> for the FID.
> 
> Bit 10 of the VTU_OP register (offset 0x05) is the VidPolicy bit,
> which one should probably preserve in mv88e6xxx_g1_vtu_op(), instead
> of always writing a 0. However, on the 6352 family, that bit is
> located at bit 12 in the VTU FID register (offset 0x02), and is always
> unconditionally cleared by the mv88e6xxx_g1_vtu_fid_write()
> function.
> 
> Since nothing in the existing driver seems to know or care about that
> bit, it seems reasonable to not add the boilerplate to preserve it for
> the 6250 (which would require adding a chip-specific vtu_op function,
> or adding chip-quirks to the existing one).
> 
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes@xxxxxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

    Andrew