Re: [net PATCH] net: phy: aquantia: fix wrong GENMASK define for LED_PROV_ACT_STRETCH

From: Russell King (Oracle)
Date: Sun May 11 2025 - 05:57:43 EST


On Sun, May 11, 2025 at 11:06:17AM +0200, Christian Marangi wrote:
> In defining VEND1_GLOBAL_LED_PROV_ACT_STRETCH there was a typo where the
> GENMASK definition was swapped.
>
> Fix it to prevent any kind of misconfiguration if ever this define will
> be used in the future.

I thought GENMASK() was supposed to warn about this kind of thing. I've
questioned in the past whether GENMASK() is better than defining fields
with hex numbers, and each time I see another repeat of this exact case,
I re-question whether GENMASK() actually gives much benefit over hex
numbers because it's just too easy to get the two arguments to
GENMASK() swapped and it's never obvious that's happened.

I don't remember there being a dribble of patches in the past
correcting bitfields defined using hex numbers, but that seems common
with GENMASK().

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