Patchwork [U-Boot] Question: issues for usb keyboard work with OHCI HCD

login
register
mail settings
Submitter Bo Shen
Date May 6, 2013, 3:01 a.m.
Message ID <51871D17.8070201@atmel.com>
Download mbox | patch
Permalink /patch/241551/
State RFC
Delegated to: Marek Vasut
Headers show

Comments

Bo Shen - May 6, 2013, 3:01 a.m.
Hi Marek,

On 5/3/2013 21:40, Marek Vasut wrote:
> Dear Bo Shen,
>
>> Hi All,
>>     Now, I test usb host support with Atmel boards, for example,
>> at91sam9x5ek board.
>>
>>     When test OHCI USB host with usb keyboard. I meet the following issue.
>> --->8---
>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
>>
>> CPU: AT91SAM9G35
>> Crystal frequency:       12 MHz
>> CPU clock        :      400 MHz
>> Master clock     :  133.333 MHz
>> DRAM:  128 MiB
>> WARNING: Caches not enabled
>> NAND:  256 MiB
>> MMC:   mci: 0
>> In:    serial
>> Out:   serial
>> Err:   serial
>> Net:   macb0
>> Hit any key to stop autoboot:  0
>> U-Boot> usb start
>> (Re)start USB...
>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
>>          scanning usb for storage devices... 0 Storage Device(s) found
>> U-Boot> setenv stdin usbkbd
>> U-Boot> ERROR: sohci_submit_job: ENOMEM
>> ERROR: sohci_submit_job failed
>> ... ...
>> (repeat to print these two error line)
>
> So the USB subsystem is leaking memory? Or do you only have too small MALLOC
> area?

I am not sure whether USB subsystem is leaking memory. I am digging it.

This issue is not relative with MALLOC area.
This issue come out when all ptd[i].usb_dev (the maximum value of i is 
64) is not NULL. Each time to call td_alloc, it will check whether 
ptd[i].usb_dev is NULL (i from 0 to 63), if not find one of 
ptd[i].usb_dev is NULL, then report ENOMEM.

>> ---<8---
>>
>>     After dig the usb ohci-hcd.c driver, I found every time it call
>> submit_int_msg -->
>> submit_common_msg --> sohci_submit_job, it will allocate memory for td
>> (just call td_alloc),
>> however nowhere free the td. So, after allocate 64 times (#define NUM_TD
>> 64),
>> all the ptd[i].usb_dev is not NULL. So, it will report: ENOMEM.
>>
>>     I don't know why in sohci_return_job it call td_submit_job again?

Any advice for this question?

>> --->8---
>> static inline int sohci_return_job(struct ohci *hc, urb_priv_t *urb)
>> {
>>       struct ohci_regs *regs = hc->regs;
>>
>>       switch (usb_pipetype(urb->pipe)) {
>>       case PIPE_INTERRUPT:
>>           /* implicitly requeued */
>>           if (urb->dev->irq_handle &&
>>                   (urb->dev->irq_act_len = urb->actual_length)) {
>>               ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
>>               ohci_readl(&regs->intrenable); /* PCI posting flush */
>>               urb->dev->irq_handle(urb->dev);
>>               ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
>>               ohci_readl(&regs->intrdisable); /* PCI posting flush */
>>           }
>>           urb->actual_length = 0;
>>           td_submit_job(
>>                   urb->dev,
>>                   urb->pipe,
>>                   urb->transfer_buffer,
>>                   urb->transfer_buffer_length,
>>                   NULL,
>>                   urb,
>>                   urb->interval);
>>           break
>> ---<8---
>>     Add where should we free the allocated td to fix the issue?

If I comment the td_submit_job and add urb_free_priv(urb) here, then usb 
keyboard work properly. It looks like

--->8---
                                 urb->dev,
                                 urb->pipe,
@@ -524,6 +525,8 @@ static inline int sohci_return_job(struct ohci *hc, 
urb_priv_t *urb)
                                 NULL,
                                 urb,
                                 urb->interval);
+#endif
+               urb_free_priv(urb);
---<8---

>>     Thanks.
>>
>> Best Regards,
>> Bo Shen
>
> Best regards,
> Marek Vasut
>

Best Regards,
Bo Shen
Bo Shen - May 13, 2013, 8:52 a.m.
Hi All,

On 5/6/2013 11:01, Bo Shen wrote:
> Hi Marek,
>
> On 5/3/2013 21:40, Marek Vasut wrote:
>> Dear Bo Shen,
>>
>>> Hi All,
>>>     Now, I test usb host support with Atmel boards, for example,
>>> at91sam9x5ek board.
>>>
>>>     When test OHCI USB host with usb keyboard. I meet the following
>>> issue.
>>> --->8---
>>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
>>>
>>> CPU: AT91SAM9G35
>>> Crystal frequency:       12 MHz
>>> CPU clock        :      400 MHz
>>> Master clock     :  133.333 MHz
>>> DRAM:  128 MiB
>>> WARNING: Caches not enabled
>>> NAND:  256 MiB
>>> MMC:   mci: 0
>>> In:    serial
>>> Out:   serial
>>> Err:   serial
>>> Net:   macb0
>>> Hit any key to stop autoboot:  0
>>> U-Boot> usb start
>>> (Re)start USB...
>>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
>>>          scanning usb for storage devices... 0 Storage Device(s) found
>>> U-Boot> setenv stdin usbkbd
>>> U-Boot> ERROR: sohci_submit_job: ENOMEM
>>> ERROR: sohci_submit_job failed
>>> ... ...
>>> (repeat to print these two error line)
>>
>> So the USB subsystem is leaking memory? Or do you only have too small
>> MALLOC
>> area?
>
> I am not sure whether USB subsystem is leaking memory. I am digging it.
>
> This issue is not relative with MALLOC area.
> This issue come out when all ptd[i].usb_dev (the maximum value of i is
> 64) is not NULL. Each time to call td_alloc, it will check whether
> ptd[i].usb_dev is NULL (i from 0 to 63), if not find one of
> ptd[i].usb_dev is NULL, then report ENOMEM.

All clue for this issue?

>>> ---<8---
>>>
>>>     After dig the usb ohci-hcd.c driver, I found every time it call
>>> submit_int_msg -->
>>> submit_common_msg --> sohci_submit_job, it will allocate memory for td
>>> (just call td_alloc),
>>> however nowhere free the td. So, after allocate 64 times (#define NUM_TD
>>> 64),
>>> all the ptd[i].usb_dev is not NULL. So, it will report: ENOMEM.
>>>
>>>     I don't know why in sohci_return_job it call td_submit_job again?
>
> Any advice for this question?

Any clue for this question?

>>> --->8---
>>> static inline int sohci_return_job(struct ohci *hc, urb_priv_t *urb)
>>> {
>>>       struct ohci_regs *regs = hc->regs;
>>>
>>>       switch (usb_pipetype(urb->pipe)) {
>>>       case PIPE_INTERRUPT:
>>>           /* implicitly requeued */
>>>           if (urb->dev->irq_handle &&
>>>                   (urb->dev->irq_act_len = urb->actual_length)) {
>>>               ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
>>>               ohci_readl(&regs->intrenable); /* PCI posting flush */
>>>               urb->dev->irq_handle(urb->dev);
>>>               ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
>>>               ohci_readl(&regs->intrdisable); /* PCI posting flush */
>>>           }
>>>           urb->actual_length = 0;
>>>           td_submit_job(
>>>                   urb->dev,
>>>                   urb->pipe,
>>>                   urb->transfer_buffer,
>>>                   urb->transfer_buffer_length,
>>>                   NULL,
>>>                   urb,
>>>                   urb->interval);
>>>           break
>>> ---<8---
>>>     Add where should we free the allocated td to fix the issue?
>
> If I comment the td_submit_job and add urb_free_priv(urb) here, then usb
> keyboard work properly. It looks like
>
> --->8---
> diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
> index 9f47351..cc60bc5 100644
> --- a/drivers/usb/host/ohci-hcd.c
> +++ b/drivers/usb/host/ohci-hcd.c
> @@ -516,6 +516,7 @@ static inline int sohci_return_job(struct ohci *hc,
> urb_priv_t *urb)
>                          ohci_readl(&regs->intrdisable); /* PCI posting
> flush */
>                  }
>                  urb->actual_length = 0;
> +#if 0
>                  td_submit_job(
>                                  urb->dev,
>                                  urb->pipe,
> @@ -524,6 +525,8 @@ static inline int sohci_return_job(struct ohci *hc,
> urb_priv_t *urb)
>                                  NULL,
>                                  urb,
>                                  urb->interval);
> +#endif
> +               urb_free_priv(urb);
> ---<8---
>

After digging more about the USB HCD driver, I don't find any better 
solution for this issue, except this one.

So, may I submit this as an RFC patch?

Best Regards,
Bo Shen
Marek Vasut - May 13, 2013, 3:12 p.m.
Dear Bo Shen,

> Hi All,
> 
> On 5/6/2013 11:01, Bo Shen wrote:
> > Hi Marek,
> > 
> > On 5/3/2013 21:40, Marek Vasut wrote:
> >> Dear Bo Shen,
> >> 
> >>> Hi All,
> >>> 
> >>>     Now, I test usb host support with Atmel boards, for example,
> >>> 
> >>> at91sam9x5ek board.
> >>> 
> >>>     When test OHCI USB host with usb keyboard. I meet the following
> >>> 
> >>> issue.
> >>> --->8---
> >>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
> >>> 
> >>> CPU: AT91SAM9G35
> >>> Crystal frequency:       12 MHz
> >>> CPU clock        :      400 MHz
> >>> Master clock     :  133.333 MHz
> >>> DRAM:  128 MiB
> >>> WARNING: Caches not enabled
> >>> NAND:  256 MiB
> >>> MMC:   mci: 0
> >>> In:    serial
> >>> Out:   serial
> >>> Err:   serial
> >>> Net:   macb0
> >>> Hit any key to stop autoboot:  0
> >>> U-Boot> usb start
> >>> (Re)start USB...
> >>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
> >>> 
> >>>          scanning usb for storage devices... 0 Storage Device(s) found
> >>> 
> >>> U-Boot> setenv stdin usbkbd
> >>> U-Boot> ERROR: sohci_submit_job: ENOMEM
> >>> ERROR: sohci_submit_job failed
> >>> ... ...
> >>> (repeat to print these two error line)
> >> 
> >> So the USB subsystem is leaking memory? Or do you only have too small
> >> MALLOC
> >> area?
> > 
> > I am not sure whether USB subsystem is leaking memory. I am digging it.
> > 
> > This issue is not relative with MALLOC area.
> > This issue come out when all ptd[i].usb_dev (the maximum value of i is
> > 64) is not NULL. Each time to call td_alloc, it will check whether
> > ptd[i].usb_dev is NULL (i from 0 to 63), if not find one of
> > ptd[i].usb_dev is NULL, then report ENOMEM.
> 
> All clue for this issue?

I assume you mean the TDs are all used up then? Are they not free'd ?

Best regards,
Marek Vasut
Bo Shen - May 14, 2013, 1:23 a.m.
Hi Marek,

On 5/13/2013 23:12, Marek Vasut wrote:
> Dear Bo Shen,
>
>> Hi All,
>>
>> On 5/6/2013 11:01, Bo Shen wrote:
>>> Hi Marek,
>>>
>>> On 5/3/2013 21:40, Marek Vasut wrote:
>>>> Dear Bo Shen,
>>>>
>>>>> Hi All,
>>>>>
>>>>>      Now, I test usb host support with Atmel boards, for example,
>>>>>
>>>>> at91sam9x5ek board.
>>>>>
>>>>>      When test OHCI USB host with usb keyboard. I meet the following
>>>>>
>>>>> issue.
>>>>> --->8---
>>>>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
>>>>>
>>>>> CPU: AT91SAM9G35
>>>>> Crystal frequency:       12 MHz
>>>>> CPU clock        :      400 MHz
>>>>> Master clock     :  133.333 MHz
>>>>> DRAM:  128 MiB
>>>>> WARNING: Caches not enabled
>>>>> NAND:  256 MiB
>>>>> MMC:   mci: 0
>>>>> In:    serial
>>>>> Out:   serial
>>>>> Err:   serial
>>>>> Net:   macb0
>>>>> Hit any key to stop autoboot:  0
>>>>> U-Boot> usb start
>>>>> (Re)start USB...
>>>>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
>>>>>
>>>>>           scanning usb for storage devices... 0 Storage Device(s) found
>>>>>
>>>>> U-Boot> setenv stdin usbkbd
>>>>> U-Boot> ERROR: sohci_submit_job: ENOMEM
>>>>> ERROR: sohci_submit_job failed
>>>>> ... ...
>>>>> (repeat to print these two error line)
>>>>
>>>> So the USB subsystem is leaking memory? Or do you only have too small
>>>> MALLOC
>>>> area?
>>>
>>> I am not sure whether USB subsystem is leaking memory. I am digging it.
>>>
>>> This issue is not relative with MALLOC area.
>>> This issue come out when all ptd[i].usb_dev (the maximum value of i is
>>> 64) is not NULL. Each time to call td_alloc, it will check whether
>>> ptd[i].usb_dev is NULL (i from 0 to 63), if not find one of
>>> ptd[i].usb_dev is NULL, then report ENOMEM.
>>
>> All clue for this issue?
>
> I assume you mean the TDs are all used up then? Are they not free'd ?

Yes, that's true, all TDs are used. Nowhere free them, so I use 
urb_free_priv() to free urb in sohci_return_job() instead of 
td_submit_job(), then it works well.

> Best regards,
> Marek Vasut

Best Regards,
Bo Shen
Marek Vasut - May 14, 2013, 2:13 a.m.
Dear Bo Shen,

> Hi Marek,
> 
> On 5/13/2013 23:12, Marek Vasut wrote:
> > Dear Bo Shen,
> > 
> >> Hi All,
> >> 
> >> On 5/6/2013 11:01, Bo Shen wrote:
> >>> Hi Marek,
> >>> 
> >>> On 5/3/2013 21:40, Marek Vasut wrote:
> >>>> Dear Bo Shen,
> >>>> 
> >>>>> Hi All,
> >>>>> 
> >>>>>      Now, I test usb host support with Atmel boards, for example,
> >>>>> 
> >>>>> at91sam9x5ek board.
> >>>>> 
> >>>>>      When test OHCI USB host with usb keyboard. I meet the following
> >>>>> 
> >>>>> issue.
> >>>>> --->8---
> >>>>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
> >>>>> 
> >>>>> CPU: AT91SAM9G35
> >>>>> Crystal frequency:       12 MHz
> >>>>> CPU clock        :      400 MHz
> >>>>> Master clock     :  133.333 MHz
> >>>>> DRAM:  128 MiB
> >>>>> WARNING: Caches not enabled
> >>>>> NAND:  256 MiB
> >>>>> MMC:   mci: 0
> >>>>> In:    serial
> >>>>> Out:   serial
> >>>>> Err:   serial
> >>>>> Net:   macb0
> >>>>> Hit any key to stop autoboot:  0
> >>>>> U-Boot> usb start
> >>>>> (Re)start USB...
> >>>>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
> >>>>> 
> >>>>>           scanning usb for storage devices... 0 Storage Device(s)
> >>>>>           found
> >>>>> 
> >>>>> U-Boot> setenv stdin usbkbd
> >>>>> U-Boot> ERROR: sohci_submit_job: ENOMEM
> >>>>> ERROR: sohci_submit_job failed
> >>>>> ... ...
> >>>>> (repeat to print these two error line)
> >>>> 
> >>>> So the USB subsystem is leaking memory? Or do you only have too small
> >>>> MALLOC
> >>>> area?
> >>> 
> >>> I am not sure whether USB subsystem is leaking memory. I am digging it.
> >>> 
> >>> This issue is not relative with MALLOC area.
> >>> This issue come out when all ptd[i].usb_dev (the maximum value of i is
> >>> 64) is not NULL. Each time to call td_alloc, it will check whether
> >>> ptd[i].usb_dev is NULL (i from 0 to 63), if not find one of
> >>> ptd[i].usb_dev is NULL, then report ENOMEM.
> >> 
> >> All clue for this issue?
> > 
> > I assume you mean the TDs are all used up then? Are they not free'd ?
> 
> Yes, that's true, all TDs are used. Nowhere free them, so I use
> urb_free_priv() to free urb in sohci_return_job() instead of
> td_submit_job(), then it works well.

Benoit, you were the last one to plumb in it, right?

Best regards,
Marek Vasut
Benoît Thébaudeau - May 14, 2013, 2:26 p.m.
Hi Marek,

On Tuesday, May 14, 2013 4:13:33 AM, Marek Vasut wrote:
> Dear Bo Shen,
> 
> > Hi Marek,
> > 
> > On 5/13/2013 23:12, Marek Vasut wrote:
> > > Dear Bo Shen,
> > > 
> > >> Hi All,
> > >> 
> > >> On 5/6/2013 11:01, Bo Shen wrote:
> > >>> Hi Marek,
> > >>> 
> > >>> On 5/3/2013 21:40, Marek Vasut wrote:
> > >>>> Dear Bo Shen,
> > >>>> 
> > >>>>> Hi All,
> > >>>>> 
> > >>>>>      Now, I test usb host support with Atmel boards, for example,
> > >>>>> 
> > >>>>> at91sam9x5ek board.
> > >>>>> 
> > >>>>>      When test OHCI USB host with usb keyboard. I meet the following
> > >>>>> 
> > >>>>> issue.
> > >>>>> --->8---
> > >>>>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
> > >>>>> 
> > >>>>> CPU: AT91SAM9G35
> > >>>>> Crystal frequency:       12 MHz
> > >>>>> CPU clock        :      400 MHz
> > >>>>> Master clock     :  133.333 MHz
> > >>>>> DRAM:  128 MiB
> > >>>>> WARNING: Caches not enabled
> > >>>>> NAND:  256 MiB
> > >>>>> MMC:   mci: 0
> > >>>>> In:    serial
> > >>>>> Out:   serial
> > >>>>> Err:   serial
> > >>>>> Net:   macb0
> > >>>>> Hit any key to stop autoboot:  0
> > >>>>> U-Boot> usb start
> > >>>>> (Re)start USB...
> > >>>>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
> > >>>>> 
> > >>>>>           scanning usb for storage devices... 0 Storage Device(s)
> > >>>>>           found
> > >>>>> 
> > >>>>> U-Boot> setenv stdin usbkbd
> > >>>>> U-Boot> ERROR: sohci_submit_job: ENOMEM
> > >>>>> ERROR: sohci_submit_job failed
> > >>>>> ... ...
> > >>>>> (repeat to print these two error line)
> > >>>> 
> > >>>> So the USB subsystem is leaking memory? Or do you only have too small
> > >>>> MALLOC
> > >>>> area?
> > >>> 
> > >>> I am not sure whether USB subsystem is leaking memory. I am digging it.
> > >>> 
> > >>> This issue is not relative with MALLOC area.
> > >>> This issue come out when all ptd[i].usb_dev (the maximum value of i is
> > >>> 64) is not NULL. Each time to call td_alloc, it will check whether
> > >>> ptd[i].usb_dev is NULL (i from 0 to 63), if not find one of
> > >>> ptd[i].usb_dev is NULL, then report ENOMEM.
> > >> 
> > >> All clue for this issue?
> > > 
> > > I assume you mean the TDs are all used up then? Are they not free'd ?
> > 
> > Yes, that's true, all TDs are used. Nowhere free them, so I use
> > urb_free_priv() to free urb in sohci_return_job() instead of
> > td_submit_job(), then it works well.
> 
> Benoit, you were the last one to plumb in it, right?

No. That was for EHCI, not OHCI.

Best regards,
Benoît
Marek Vasut - May 14, 2013, 3:54 p.m.
Dear Benoît Thébaudeau,

> Hi Marek,
> 
> On Tuesday, May 14, 2013 4:13:33 AM, Marek Vasut wrote:
> > Dear Bo Shen,
> > 
> > > Hi Marek,
> > > 
> > > On 5/13/2013 23:12, Marek Vasut wrote:
> > > > Dear Bo Shen,
> > > > 
> > > >> Hi All,
> > > >> 
> > > >> On 5/6/2013 11:01, Bo Shen wrote:
> > > >>> Hi Marek,
> > > >>> 
> > > >>> On 5/3/2013 21:40, Marek Vasut wrote:
> > > >>>> Dear Bo Shen,
> > > >>>> 
> > > >>>>> Hi All,
> > > >>>>> 
> > > >>>>>      Now, I test usb host support with Atmel boards, for example,
> > > >>>>> 
> > > >>>>> at91sam9x5ek board.
> > > >>>>> 
> > > >>>>>      When test OHCI USB host with usb keyboard. I meet the
> > > >>>>>      following
> > > >>>>> 
> > > >>>>> issue.
> > > >>>>> --->8---
> > > >>>>> U-Boot 2013.04-dirty (May 03 2013 - 11:00:34)
> > > >>>>> 
> > > >>>>> CPU: AT91SAM9G35
> > > >>>>> Crystal frequency:       12 MHz
> > > >>>>> CPU clock        :      400 MHz
> > > >>>>> Master clock     :  133.333 MHz
> > > >>>>> DRAM:  128 MiB
> > > >>>>> WARNING: Caches not enabled
> > > >>>>> NAND:  256 MiB
> > > >>>>> MMC:   mci: 0
> > > >>>>> In:    serial
> > > >>>>> Out:   serial
> > > >>>>> Err:   serial
> > > >>>>> Net:   macb0
> > > >>>>> Hit any key to stop autoboot:  0
> > > >>>>> U-Boot> usb start
> > > >>>>> (Re)start USB...
> > > >>>>> USB0:   scanning bus 0 for devices... 2 USB Device(s) found
> > > >>>>> 
> > > >>>>>           scanning usb for storage devices... 0 Storage Device(s)
> > > >>>>>           found
> > > >>>>> 
> > > >>>>> U-Boot> setenv stdin usbkbd
> > > >>>>> U-Boot> ERROR: sohci_submit_job: ENOMEM
> > > >>>>> ERROR: sohci_submit_job failed
> > > >>>>> ... ...
> > > >>>>> (repeat to print these two error line)
> > > >>>> 
> > > >>>> So the USB subsystem is leaking memory? Or do you only have too
> > > >>>> small MALLOC
> > > >>>> area?
> > > >>> 
> > > >>> I am not sure whether USB subsystem is leaking memory. I am digging
> > > >>> it.
> > > >>> 
> > > >>> This issue is not relative with MALLOC area.
> > > >>> This issue come out when all ptd[i].usb_dev (the maximum value of i
> > > >>> is 64) is not NULL. Each time to call td_alloc, it will check
> > > >>> whether ptd[i].usb_dev is NULL (i from 0 to 63), if not find one
> > > >>> of ptd[i].usb_dev is NULL, then report ENOMEM.
> > > >> 
> > > >> All clue for this issue?
> > > > 
> > > > I assume you mean the TDs are all used up then? Are they not free'd ?
> > > 
> > > Yes, that's true, all TDs are used. Nowhere free them, so I use
> > > urb_free_priv() to free urb in sohci_return_job() instead of
> > > td_submit_job(), then it works well.
> > 
> > Benoit, you were the last one to plumb in it, right?
> 
> No. That was for EHCI, not OHCI.

Hmmm ... I don't have any OHCI device. Bo, maybe you can try tracing it and 
fixing it?

Best regards,
Marek Vasut

Patch

diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 9f47351..cc60bc5 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -516,6 +516,7 @@  static inline int sohci_return_job(struct ohci *hc, 
urb_priv_t *urb)
                         ohci_readl(&regs->intrdisable); /* PCI posting 
flush */
                 }
                 urb->actual_length = 0;
+#if 0
                 td_submit_job(