Am Montag, 16. Januar 2012, 17:51:33 schrieb Johannes Berg: > On Mon, 2012-01-16 at 16:42 +0100, Helmut Schaa wrote: > > Signed-off-by: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx> > > --- > > > > I'm currently writing some code for rt2800 that requires the driver > > to stop sending to a specific station for a short period of time > > (until all AMPDUs are finished to work around a hw issue that affects > > rate sampling with minstrel_ht). I decided to give > > ieee80211_sta_block_awake a try, however, the machine sometimes locked > > up while running some performance tests but due to a hw watchdog I > > wasn't able to get any sort of backtrace :( > > > > So, while doing some review of the ieee80211_sta_block_awake I came > > across this and wondered if softirqs should be disabled when delivering > > the buffered frames in sta_unblock. > > > > Using this patch I cannot reproduce the lockup anymore. > > > > So, is there any special reason this single code path in sta_unblock > > doesn't disable softirqs? > > This seems right The patch or the current approach without disable_bh? > -- not sure where the lockup would be though. Not sure either :( unfortunately I cannot disable the hw watchdog (and that has a timeout of only 2 seconds). Maybe I can reproduce it with a regular rt2800 PCI card ... 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
