Am 22.07.2013 21:54, schrieb Christian Lamparter:
Hello!
On Monday, July 22, 2013 05:21:54 PM Oleksij Rempel wrote:
i'm one of ath9k_htc devs. Currently i'm working on usb_suspend issue of
this adapters. Looks like ar9271 and ar7010 have FUSB200, and i
accidentally discovered that 9170 have it too. Are there any issue with
usb-suspend + xhci controllers by you? Did you some how specially
handled it?
No, I haven't heard any complains about xhci + suspend. In fact,
it's working fine with the NEC xhci I have. I also have a AR9271
and AR7010, so if you want I could try if they survive a suspend
+resume cycle when attached.
But, I do have a bug-report from someone else who has/had? problems
with carl9170 and xhci. If you want, you can get the details from:
"carl9170 A-MPDU transmit problem":
<http://comments.gmane.org/gmane.linux.kernel.wireless.general/104597>
The likely cause is related to Intel's xhci silicon (Ivy Bridge is
affected, but I don't know about Haswell):
<http://permalink.gmane.org/gmane.linux.kernel.wireless.general/104602>
Same situation is here - i have problem on Ivy Bridge.
Steps to reproduce:
- plug adapter. Module and firmware will be loaded
- make sure usb autosupend is enabled. By default it is not! Use
powertop or directly sysfs to enable autosuspend for this device
- rmmod .... and wait some seconds until adapter is suspended and then
modprobe ath9k_htc
first packet which is bigger as 64Byte will kill EP4 FIFO. Size register
will report wrong size.. bigger as FIFO can handle. And only first ~40
readet bytes will be actually OK.. all the rest of packet will be trashed.
But... i'm not 100% sure, if the FIFO as actually over filled, or host
controller sending brocken data, or wrong timing...
There are flawing workarounds:
- reload xhci_hcd module.
- do USB_PHY reset, from firmware.
- use other host controller
It will be good if you can test it on you NEX xhci.
However, I haven't heard back from Sarah or Seth about this matter
(Added them to the CC. so "PLEASE" join if either of you think to
have something to add about carl9170 transmit problem or ath9k_htc's
suspend issue... of course, if it was fixed, then it would be really
great to know which commit "fixed it"...)
Regards
Christian
--
Regards,
Oleksij
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