Hi Johannes, Am Freitag, 18. März 2011 schrieb Johannes Stezenbach: > On Fri, Mar 18, 2011 at 04:23:15PM +0100, Juan Carlos Garza wrote: > > I applied the patches (manually), and tested the stick. > > > > The transfer of big loads now is successful. The > > "rt2800_txdone_entry_check:" warnings are still there, but they are > > less frequent (just like in the example i gave you with the laptop > > where it succeeded with the unpatched driver), some 5 warnings every > > 1, 2 or 3 seconds. > > Thanks for testing! The occational "tx status missed" is unavoidable > due to hardware limitations. My patches reduce the number of them, > but more importantly they fix a few issues with TX (status) timeout handling. > (IIRC false positives in TX timeout check, and fluash would wait for > TX queue empty which would never happen without the timer to reap > the status queue.) > > I tested a lot with these patches and they work stable for me, however I > must admit I'm not sure why they help in your case (i.e. why does > bulk transfer stall without these patches?). Just an assumption: In rt2800pci I had the problem that the tx status register sometimes suffered from overflows. And I was able to avoid the overflow by reading the TX_STA_FIFO register fast enough (in hard irq context). And I guess your patch also changed the timing of TX_STA_FIFO reads is rt2800usb and thus reduces the number of overflows. However, this is just a shot in the dark. Helmut -- 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
