[Gta04-owner] strange message after unbinding some stuff

[H. Nikolaus Schaller]

Hi Andreas,

Am 27.11.2015 um 10:01 schrieb Andreas Kemnade <andreas at kemnade.info>:

> Hi,
> 
> I found this message in dmesg
> [ 1841.146636] (NULL device *): REMOVING GPIOCHIP WITH GPIOS STILL
> REQUESTED
> after doing this:
> rmmod libertas_sdio
> root at gta04:/sys/class/regulator/regulator.6/w2cbw003-vdd/driver# echo
> w2cbw003 >unbind
> 
> Reason: I did not like the power consumption.

Well, it should momentarily turn on the WiFi to check if WiFi is available and
then turn it off. At least that is what it did with the 3.7 and 3.12 kernel.

I am not sure if it still does - the whole SDIO stack has been turned upside
down several times since 3.12. And Device Tree also has a difficult to understand
influence.

> after
> root at gta04:/sys/class/regulator/regulator.6/480b4000.mmc-vmmc/driver#
> echo 480b4000.mmc >unbind 
> it finally went down.
> 
> But maybe that message leads to an interesting bug.

Well, it indicates that the driver's remove function isn't coded well enough.

Most drivers assume they are compiled into the kernel and are never removed...

> 
> Regards,
> Andreas
> _______________________________________________
> Gta04-owner mailing list
> Gta04-owner at goldelico.com
> http://lists.goldelico.com/mailman/listinfo.cgi/gta04-owner

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