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Date:   Tue,  3 Aug 2021 10:50:32 +0200
From:   Michael Walle <>
Cc:, Michael Walle <>
Subject: Re: net: intel/e1000e/netdev.c __ew32_prepare parameter not used?


> It seems the parameter `*hw` is not used.
> Although I didn't find where `FWSM` is defined.
> Should it be removed? Or is the parameter really needed?
> static void __ew32_prepare(struct e1000_hw *hw)
> {
>     s32 i = E1000_ICH_FWSM_PCIM2PCI_COUNT;
>     while ((er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI) && --i)
>         udelay(50);
> }

If you have a look at the definition of er32() (which is a macro and
is defined in e1000.h, you'll see that the hw parameter is used
there without being a parameter of the macro itself. Thus if you'd
rename the parameter you'd get a build error. Not really the best
code to look at when you want to learn coding, because that's an
example how not to do things, IMHO.


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