Re: [PATCH] wifi: rt2x00: use explicitly signed type for clamping

From: Andy Shevchenko
Date: Wed Oct 19 2022 - 07:49:54 EST


On Wed, Oct 19, 2022 at 10:52:19AM +0200, Stanislaw Gruszka wrote:
> On Tue, Oct 18, 2022 at 02:27:34PM -0600, Jason A. Donenfeld wrote:
> > On some platforms, `char` is unsigned, which makes casting -7 to char
> > overflow, which in turn makes the clamping operation bogus. Instead,
> > deal with an explicit `s8` type, so that the comparison is always
> > signed, and return an s8 result from the function as well. Note that
> > this function's result is assigned to a `short`, which is always signed.
> >
> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> > Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> > Cc: Stanislaw Gruszka <stf_xl@xxxxx>
> > Cc: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx>
> > Cc: Kalle Valo <kvalo@xxxxxxxxxx>
> > Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
>
> I prefer s8 just because is shorter name than short :-)

Shouldn't the corresponding data structure type be fixed accordingly?

--
With Best Regards,
Andy Shevchenko