Re: [Bluez-devel] [BUG] hci_usb + uhci vs. usb-uhci

[Jean Tourrilhes <jt@bougret.hpl.hp.com>]

On Fri, Sep 12, 2003 at 06:32:51PM -0400, Johannes Erdfelt wrote:
> On Fri, Sep 12, 2003, Jean Tourrilhes <jt@bougret.hpl.hp.com> wrote:
> > 	I just spent some time tracking a problem with hci_usb (BlueZ
> > USB driver) and uhci. This happens on 2 different PCs with different
> > hardware and 2.4.X kernels, I describe one here.
> > 
> > UHCI Hardware :
> > 	00:07.2 USB Controller: Intel Corp. 82371AB PIIX4 USB (rev 01)
> > BlueTooth hardware :
> > 	HCI Ver: 1.1 (0x1) HCI Rev: 0x1bb LMP Ver: 1.1 (0x1) LMP Subver: 0x1bb
> > 	Manufacturer: Cambridge Silicon Radio (10)
> > Kernel : 2.4.22 UP
> > 
> > 	What happens :
> > 	Start BNEP session (i.e. TCP/IP over BT). Start intensive TCP
> > app (web download, netperf, X-Window). After a few seconds, on the
> > transmitter the hardware just stops :
> > --------------------------------------------------------
> > < ACL data: handle 0x0029 flags 0x01 dlen 192
> > < ACL data: handle 0x0029 flags 0x01 dlen 192
> > < ACL data: handle 0x0029 flags 0x01 dlen 192
> > < ACL data: handle 0x0029 flags 0x01 dlen 192
> > < ACL data: handle 0x0029 flags 0x01 dlen 192
> > --------------------------------------------------------
> > 	The "Number of Completed Packets" event never comes back. I
> > have to physically unplug the USB dongle to recover. I could not see
> > any error messages in the log, except after a few seconds some BNEP
> > and ACL timeouts (which are expected).
> > 
> > 	I initially though that it was a BlueTooth problem. However,
> > I've never seen it happening with my OHCI hardware on SMP (which is
> > what I normally use). And, if I replace uhci.o with usb-uhci.o on the
> > same hardware, the problem goes away completely.
> > 	So, there is definitely something about uhci.o...
> 
> Did you enable zero packet when you compiled the BT driver?
> 
> JE

	Nope. The compilation of hci_usb was exactly the same for uhci
and for usb-uhci/ohci.

	Jean