Re: [PATCH] mfd: tps65911-comparator: Fix an off by one bug

From: Dan Carpenter
Date: Fri Apr 20 2018 - 04:59:55 EST

On Thu, Apr 19, 2018 at 04:46:34PM +0300, Dan Carpenter wrote:
> The tps_comparators[] array is used in two places. We only access the
> COMP1 (1) and COMP2 (2) elements. Unfortunately, we're accessing the
> wrong elements and also one element beyond the end of the array. There
> was supposed to be a zero element at the start of the array which is
> isn't accessed but makes the math work out nicely.
> Fixes: 6851ad3ab346 ("TPS65911: Comparator: Add comparator driver")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
> I can't actually compile this code...

I assumed that I couldn't compile this code because it was non-x86 or
something but actually it's just really out of date. We broke it in
2012 when we removed the ->write() function pointer.

commit 3f7e82759c692df473675ed06fb90b20f1f225c3
Author: Rhyland Klein <rklein@xxxxxxxxxx>
Date: Tue May 8 11:42:38 2012 -0700

mfd: Commonize tps65910 regmap access through header

dan carpenter