On 01/07/2016 08:19 AM, David Mosberger wrote:
We are seeing a curious issue where WLAN connectivity sometimes gets stuck until a "wpa_cli reassociate" command is issued. At the WPA level, everything appears to be working fine) (see thread starting at http://lists.infradead.org/pipermail/hostap/2016-January/034454.html).
I don't remember seeing you mention the driver and NIC you are using. I think this is likely a driver bug, so please provide that info. Thanks, Ben
What's truly odd is when connectivity is stuck, you can often "ping" the network's gateway exactly once and then you either get no response anymore or, after a long time (like 40-60 seconds), the floodgate opens and (almost) all previously sent ping responses arrive all at the same time (in the latter case, connectivity is fine afterwards again). This makes me wonder if there may be a packet queue that somehow gets stuck. I have turned on mac80211 debugging but have not found anything that seems to correlate with the loss of connectivity. All I know is that wpa_cli reassociate so far is the least intrusive workaround that seems to reliably bring back connectivity. We are based on kernel 3.7.0 but have back-ported the mac80211 fixes from the linux-3.7.y stable branch. I'm not very familiar with the wireless stack, so any tips or hints on how to further debug this would be greatly appreciated. Thanks and best regards, --david
-- Ben Greear <greearb@xxxxxxxxxxxxxxx> Candela Technologies Inc http://www.candelatech.com -- 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
