ath9k-htc on OHCI -> bogus usb xfer

[Oleksij Rempel]

Am 05.07.2016 um 19:31 schrieb Alexey Brodkin:
> Hi Oleksij,
> 
> On Tue, 2016-07-05 at 19:23 +0200, Oleksij Rempel wrote:
>> Hi,
>>
>> Am 05.07.2016 um 14:20 schrieb Alexey Brodkin:
>>>
>>> Hello,
>>>
>>> Looks like this is another manifestation of already seen problem with ath9k-htc
>>> and OHCI controller.
>>>
>>> I'm trying to get USB Wi-Fi dongle based on Atheros AR9271 to work with our
>>> development board (this is Synopsys AXS103) and seeing a picture very similar to
>>> what was discussed here http://thread.gmane.org/gmane.linux.usb.general/110847
>>>
>>> Below is what I see on insertion of the dongle.
>>> Note I have the most recent ath9k-htc firmware (see "ath9k_htc/htc_9271-1.4.0.fw"
>>> in the log below) and Linux kernel is 4.6.3 (latest stable as of today) but the same
>>> happens even on 4.4.
>>>
>>> Interesting enough if I simply remove or disable the warning like that
>>> ------------------------>8---------------------------
>>> diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
>>> index 3d27477..a317e1e 100644
>>> --- a/drivers/usb/core/urb.c
>>> +++ b/drivers/usb/core/urb.c
>>> @@ -443,11 +443,6 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
>>>          * cause problems in HCDs if they get it wrong.
>>>          */
>>>  
>>> -       /* Check that the pipe's type matches the endpoint's type */
>>> -       if (usb_pipetype(urb->pipe) != pipetypes[xfertype])
>>> -               dev_WARN(&dev->dev, "BOGUS urb xfer, pipe %x != type %x\n",
>>> -                       usb_pipetype(urb->pipe), pipetypes[xfertype]);
>>> -
>>>         /* Check against a simple/standard policy */
>>>         allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT | URB_DIR_MASK |
>>>                         URB_FREE_BUFFER);
>>> ------------------------>8---------------------------
>>> everything seem to work quite nice.
>>>
>>> Any thoughts are much appreciated.
>>>
>>> That's the log itself:
>>> ------------------------>8---------------------------
>>> usb 1-1: new full-speed USB device number 2 using ohci-platform
>>> usb 1-1: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw requested
>>> usb 1-1: ath9k_htc: Transferred FW: ath9k_htc/htc_9271-1.4.0.fw, size: 51008
>>> ------------[ cut here ]------------
>>> WARNING: CPU: 0 PID: 4 at drivers/usb/core/urb.c:450 usb_submit_urb+0x162/0x404
>>> usb 1-1: BOGUS urb xfer, pipe 1 != type 3
>>> Modules linked in:
>>> CPU: 0 PID: 4 Comm: kworker/0:0 Not tainted 4.6.3 #10
>>> Workqueue: events request_firmware_work_func
>>>
>>> Stack Trace:
>>>   arc_unwind_core.constprop.1+0x94/0x10c
>>> ---[ end trace 2249b79eac9991d1 ]---
>>> ------------[ cut here ]------------
>>> WARNING: CPU: 0 PID: 4 at drivers/usb/core/urb.c:450 usb_submit_urb+0x162/0x404
>>> usb 1-1: BOGUS urb xfer, pipe 1 != type 3
>>> Modules linked in:
>>> CPU: 0 PID: 4 Comm: kworker/0:0 Tainted: G        W       4.6.3 #10
>>> Workqueue: events request_firmware_work_func
>>>
>>> Stack Trace:
>>>   arc_unwind_core.constprop.1+0x94/0x10c
>>> ---[ end trace 2249b79eac9991d2 ]---
>>> ------------[ cut here ]------------
>>> WARNING: CPU: 0 PID: 4 at drivers/usb/core/urb.c:450 usb_submit_urb+0x162/0x404
>>> usb 1-1: BOGUS urb xfer, pipe 1 != type 3
>>> Modules linked in:
>>> CPU: 0 PID: 4 Comm: kworker/0:0 Tainted: G        W       4.6.3 #10
>>> Workqueue: events request_firmware_work_func
>>>
>>> Stack Trace:
>>>   arc_unwind_core.constprop.1+0x94/0x10c
>>> ---[ end trace 2249b79eac9991d3 ]---
>>>
>>
>> please send content of hif_usb_send_regout() from your source code.
>> It is located in drivers/net/wireless/ath/ath9k/hif_usb.c
> 
> I use vanilla 4.6.3 tree so that's what I have is the same as
> http://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/drivers/net/wireless/ath/ath9k/hif_usb.c?h=linu
> x-4.6.y#n99

Interesting.
Can you please send lsusb -v for this adapter? and it will be
interesting to see, which usb endpoint was actualy used.

-- 
Regards,
Oleksij

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