linux-kernel - Re: regression: b43-sdio: probe of mmc0:0001:1 failed with error -16

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Message-ID: <AANLkTim8bfNDacFLs-kmkmtQuxUb-1BEqTNVW1dGQZxd@mail.gmail.com>
Date:	Mon, 1 Nov 2010 16:33:54 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Arnd Hannemann <arnd@...dnet.de>
Cc:	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: regression: b43-sdio: probe of mmc0:0001:1 failed with error -16

On Mon, Nov 1, 2010 at 4:22 PM, Arnd Hannemann <arnd@...dnet.de> wrote:
> It looks like this:
>
> root@...evb:~# modprobe b43
> [   36.023437] cfg80211: Calling CRDA to update world regulatory domain
> [   36.460937] sdio_bus_probe()
> [   36.468750] sdio_bus_probe() calling pm_runtime_get_sync()
> [   36.468750] mmc_power_restore_host() begin
> [   36.570312] mmc_sdio_power_restore() begin
> [   36.570312] mmc_sdio_init_card()
> [   36.578125] mmc_sdio_init_card() mmc_send_io_op_cond ret=-110

OK, thanks. CMD5 time outs. I suspect it's similar to what we have
with the XO-1.5: despite software calling mmc_power_off/on, the
hardware does not go through full power off/on cycle.

>> The interesting part is actually what happens after sdio_bus_probe(),
>> not before it.
>
> Actually nothing special happens after sdio_bus_probe()

The actual failure happens after it (in mmc_sdio_init_card).

> With your patch the problem goes away, thanks.

Thank you for testing this,
Ohad.
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