Stanislaw Gruszka schrieb: > Hello > > On Tue, Jan 24, 2012 at 06:37:45PM +0100, Andreas Hartmann wrote: >> Stanislaw Gruszka schrieb: >>> This seems to be only needed as workaround for hardware problem on >>> PCI devices. >> >> I tested this series (with all other resent patches applied) against a >> rt3572usb based device (Linksys WUSB600N) on to different machines >> (64bit smp (linux 3.2.1) and 32bit single core (linux 2.6.37.6)). I >> couldn't see any functional change. Unfortunately it's as bad as >> always :-(. >> >> But one thing is new: I'm getting now these errors in messages (with >> kernel 3.2.1) in the moment of the stall (which never stops until the >> module is unloaded (or I didn't display enough patience)): >> >> >> Jan 24 18:10:23 nb kernel: [ 798.289036] phy0 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x101c with error -71. > This is write to BBP_CSR_CFG. I don't know, which patch is is responsible > for that error (patch4 looks most suspicious), can you check those 4 patches > one by one, and tell us which is causing this error? I removed Patch 1 and 4 - the problem didn't change. I think it's not patch related, but system related: This was the first time, I tested with this notebook (because compiling is much more fast :-)) and to get more timing issues: this notebook is a Core i5 (the other was a CeleronM). Besides that, there is another kernel version (3.2 vs. 2.6.37.6) and a completely new compat-wireless. But I can say one more thing: If this error above came up, the device isn't detected any more. Even reloading of the complete wireless stack is useless: 11329.157039] cfg80211: Calling CRDA to update world regulatory domain [11329.164191] cfg80211: World regulatory domain updated: [11329.164200] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [11329.164202] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [11329.164204] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [11329.164206] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [11329.164208] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [11329.164209] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [11329.246554] phy0 -> rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x0580 with error -19. [11329.246585] phy0 -> rt2800_init_eeprom: Error - Invalid RT chipset detected. [11329.246590] phy0 -> rt2x00lib_probe_dev: Error - Failed to allocate device. [11329.246688] usbcore: registered new interface driver rt2800usb [11329.246863] usb 2-1.6: USB disconnect, device number 4 You have to replug the device to get it detected again. Some more details about what is concretely broken (tested with netperf): AP -> STA 2.4 MBit/s (if it doesn't stall) STA -> AP doesn't work at all BTW: the performance should be at this location about 65 MBit/s (AP->STA) or 55 MBit/s (STA-AP). Well, I think, that the device is just overrun. The USB-handling looks really odd. See here: http://rt2x00.serialmonkey.com/pipermail/users_rt2x00.serialmonkey.com/2011-November/004278.html Kind regards, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
