On Fri, Nov 27, 2020 at 09:35:39AM +0100, Geert Uytterhoeven wrote:

Hi Uwe,

On Thu, Nov 26, 2020 at 6:03 PM Uwe Kleine-König
[off-list ref] wrote:

quoted

The remove callback is only called for devices that were probed
successfully before. As the matching probe function cannot complete
without error if dev->match_id != PS3_MATCH_ID_SOUND, we don't have to
check this here.

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

Thanks for your patch!

Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>

Note that there are similar checks in snd_ps3_driver_probe(), which
can be removed, too:

        if (WARN_ON(!firmware_has_feature(FW_FEATURE_PS3_LV1)))
                return -ENODEV;
        if (WARN_ON(dev->match_id != PS3_MATCH_ID_SOUND))
                return -ENODEV;

I had to invest some brain cycles here. For the first:

Assuming firmware_has_feature(FW_FEATURE_PS3_LV1) always returns the
same value, snd_ps3_driver_probe is only used after this check succeeds
because the driver is registered only after this check in
snd_ps3_init().

The second is superflous because ps3_system_bus_match() yields false if
this doesn't match the driver's match_id.

Best regards
Uwe

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Pengutronix e.K.                           | Uwe Kleine-König            |
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