"ext Siarhei Siamashka" <[EMAIL PROTECTED]> writes: > With a simple patch that just retries operation on such error, > wireless connection got stable. After a long test with the test > script, no problems were detected. The following lines could be > occasionally seen in dmesg log and it proves that there were > potential connection drops encountered, but they all did not cause any > troubles in reality (MD5 of downloaded file was always OK): > [50559.494232] Dynamic PSM > [50559.494323] PSM timeout 1000 ms > [50622.038146] We haven't got a READY interrupt from WAKEUP. (firmware > crashed?) > [50622.038269] Try again... > [50622.038330] succeeded!!!
Yeah, sounds like the SPI bus is not reliable because retransmitting the frame succeeds. > I'm attaching the same patch here. It is not very clean, but it does > the job (for Nokia 770). Thanks. I'm sure this patch helps with SPI problems. > And I have encountered other problems with WLAN driver that are yet to > be solved. For example, sometimes speed drops to ~30KB/s (that's still > an unresolved mystery to me). Do you see this only with 770 or also with N800/N810? > Also CPU usage is very high because of busyloop when waiting till > DMA transfer is done. Tasklet, which executes the code can't be > easily preempted, as far as I understand kernel documentation. Maybe > it is possible to split tasklet into several parts, one of them > could be responsible for initiating DMA transfer, the other could be > activated on DMA transfer completion? This all is important for > video streaming as any excessive CPU resources consumption by WLAN > driver negatively impacts video playback performance. Sorry, I'm not familiar with OMAP 1710 McBSP, so I can't comment. -- Kalle Valo _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
