Hi Alan, I've been getting reports of problems with speedtouch modems in 2.6.17,
and the problems seem to come from your patch (as623) "UHCI: use one QH per
endpoint,
not per URB".
Here are the problem descriptions:
Antonello: "I just downloaded linux kernel 2.6.17.1 and compiled as usual.
After I
installed it in my computer, I noticed the speedtouch modem does not
work as usual. The connection process works just fine but after some
minutes it loses connection and the USB led alternatively flashes red
and green while the ADSL led stays green. If I boot kernel 2.6.16.19,
the modem works just fine."
and
Juampe: "I have problems with 2.6.17 and the speedtouch driver block the
connection at some point that i can't locate.
wave:~# atmdiag
Itf TX_okay TX_err RX_okay RX_err RX_drop
0 AAL0 0 0 0 0 0
AAL5 266537 0 198023 1 0
RX cells don't increment, AFAIK the driver don't manage incoming ATM cells"
Juampe kindly performed a git bisection:
> It seems to be an USB problem in 2.6.16 - 2.6.17-RC1, this is the
> bisected patch
>
> wave:/usr/src/bughunting# git bisect bad
> dccf4a48d47120a42382ba526f1a0848c13ba2a4 is first bad commit
> commit dccf4a48d47120a42382ba526f1a0848c13ba2a4
> Author: Alan Stern <[EMAIL PROTECTED]>
> Date: Sat Dec 17 17:58:46 2005 -0500
>
> [PATCH] UHCI: use one QH per endpoint, not per URB
>
> This patch (as623) changes the uhci-hcd driver to make it use one QH per
> device endpoint, instead of a QH per URB as it does now. Numerous areas
> of the code are affected by this. For example, the distinction between
> "queued" URBs and non-"queued" URBs no longer exists; all URBs belong to
> a queue and some just happen to be at the queue's head.
>
> Signed-off-by: Alan Stern <[EMAIL PROTECTED]>
> Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
>
> :040000 040000 2210205f1df6153ddaa93cf25eb0300df45b5405
> c287ccdd16dae4ef945ecc1e3e58a163ba27ebad M drivers
>
> Can i open now the bug?
Antonello, can you please confirm that for you too the modem works ok if this
patch is reverted?
I personally didn't have any problems with 2.6.17 (I'm also using uhci).
Antonello, Juampe: can you please rebuild your 2.6.17 kernels with
CONFIG_USB_DEBUG=y, and send your dmesg output.
Best wishes,
Duncan.
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