Re: MMC runtime PM patches break libertas probe

[Ohad Ben-Cohen <ohad@wizery.com>]

Hi Daniel,

On Sun, Oct 31, 2010 at 4:29 PM, Daniel Drake <dsd@laptop.org> wrote:
> I'm running linus master and can't load the libertas module for the
> sd8686 wifi hardware in the OLPC XO-1.5 laptop.
> Probe fails with -16.

That's why I asked you if this scenario works in the other thread.
It's probably the same issue (both scenarios try to power up the chip
by calling mmc_sdio_power_restore).

I guess the error comes from mmc_sdio_init_card() - can you please
check out what exactly triggers it inside that function (just put some
printk's there..) ?

Thanks!
Ohad.

>
> dmesg and config:
> http://dev.laptop.org/~dsd/20101031/dmesg-sdio-probe-fail.txt
> http://dev.laptop.org/~dsd/20101031/config-sdio-probe-fail.txt
>
> I've done some initial investigation; in sdio_bus_probe() we do this:
>        ret = pm_runtime_get_sync(dev);
>        if (ret < 0)
>                goto out;
>
> and pm_runtime_get_sync() returns -16
>
> Daniel
>