On Tue, Nov 24, 2020 at 11:32 AM Uwe Kleine-König
[off-list ref] wrote:

Most amba drivers return 0 in their remove callback. Together with the
driver core ignoring the return value anyhow, it doesn't make sense to
return a value here.

So add a warning to the only driver that could return an error code and
change the remove prototype to return void, which makes it explicit that
returning an error value doesn't work as expected. This simplifies changing
the core remove callback to return void, too.

Signed-off-by: Uwe Kleine-König <redacted>

Makes sense, I checked that the vfio driver cannot actually return an error
either, the 'if (vdev)' check seems to be done out of unnecessary caution,
as the probe would never have succeeded if that was NULL.

         Arnd

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