libertas_sdio doesn't work after reloading

Matt Reimer mreimer at
Mon Feb 2 17:13:52 EST 2009

On Mon, Feb 2, 2009 at 1:58 PM, Andrey Yurovsky <andrey at> wrote:
> Hi Matt.  Is this on an embedded system or on a desktop PC with some
> host controller?  If so, which one?  I'm curious because module reload
> seems to work fine with my Ricoh host controller.

This is on an embedded system, using the SD controller on a pxa320.


> On Mon, Feb 2, 2009 at 1:31 PM, Matt Reimer <mreimer at> wrote:
>> For some reason the libertas_sdio driver works the first time it is
>> loaded, but not after subsequent reloads. What is the proper fix for
>> this problem?
>> I experimented with trying to send CMD_802_11_RESET but to no effect.
>> For now I'm using a nasty hack that simulates a card insertion/removal
>> on load/unload, but at least it works.
>> Perhaps when the card resets, it also resets the SDIO communication
>> parameters (probably back to 1-bit, etc.) but the stack is still
>> running the clock fast, in wide mode? I see there's a function
>> sdio_reset_comm(), but it's unused.
>> Here's a previous discussion on this problem:
>> "rmmod libertas_sdio and reinsert causes problems with firmware upload"
>> What would be the best way to proceed?
>> Matt
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