Re: Keyboard stops working after *lock [Was: 2.6.21-rc2-mm1]

[Jiri Slaby]

Jiri Kosina napsal(a):
> On Sun, 11 Mar 2007, Jiri Slaby wrote:
>
> > > -	/* make sure the unused bits in the last byte are zeros */
> > > -	if (count > 0 && size > 0)
> > > -		data[(offset+count*size-1)/8] = 0;
> > > -
> > No, this doesn't help -- -rc3-mm2 minus this behaves exactly the same. 
[...]
> Otherwise, would you care to bisect?

Bisecting figured out the culprit:
Commit: 17230acdc71137622ca7dfd789b3944c75d39404
Author: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> Mon, 19 Feb 2007 15:52:45 -0500

    UHCI: Eliminate asynchronous skeleton Queue Headers

    This patch (as856) attempts to improve the performance of uhci-hcd by
    removing the asynchronous skeleton Queue Headers.  They don't contain
    any useful information but the controller has to read through them at
    least once every millisecond, incurring a non-zero DMA overhead.

    Now all the asynchronous queues are combined, along with the period-1
    interrupt queue, into a single list with a single skeleton QH.  The
    start of the low-speed control, full-speed control, and bulk sublists
    is determined by linear search.  Since there should rarely be more
    than a couple of QHs in the list, the searches should incur a much
    smaller total load than keeping the skeleton QHs.

    Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>


-mm minus (only) this one is OK.

regards,
--
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E

Hnus <hnus@xxxxxxxxxx> is an alias for /dev/null
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