On 09/10/17 10:38:55 -0700, Dmitry Torokhov wrote: > On Sun, Oct 08, 2017 at 08:41:16PM +0100, Nick Dyer wrote: > > On Sun, Oct 08, 2017 at 07:44:18PM +0100, Christos Gkekas wrote: > > > Variable byte_offset is unsigned so checking whether it is greater or > > > equal to zero is redundant. > > > > > > Signed-off-by: Christos Gkekas <chris.gekas@xxxxxxxxx> > > > > Yep - looks sensible to me. > > > > Signed-off-by: Nick Dyer <nick@xxxxxxxxxxxxx> > > I believe this has been discussed before and Linus told us to keep the > such checks as is: they neatly document the ranges of values, safe in > case we ever change the type of the variables, and do not cost us > anything at execution time. > Fair enough, thanks for your feedback. I believe you are referring to this: https://lkml.org/lkml/2006/11/28/206 Regards, Christos > > > > > > --- > > > drivers/input/touchscreen/atmel_mxt_ts.c | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c > > > index 7659bc4..baafaed 100644 > > > --- a/drivers/input/touchscreen/atmel_mxt_ts.c > > > +++ b/drivers/input/touchscreen/atmel_mxt_ts.c > > > @@ -1356,7 +1356,7 @@ static int mxt_prepare_cfg_mem(struct mxt_data *data, > > > > > > byte_offset = reg + i - cfg_start_ofs; > > > > > > - if (byte_offset >= 0 && byte_offset < config_mem_size) { > > > + if (byte_offset < config_mem_size) { > > > *(config_mem + byte_offset) = val; > > > } else { > > > dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n", > > > -- > > > 2.7.4 > > > > > Thanks. > > -- > Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
