I see a similar problem with ath6k where schedule scan never completes and then subsequent scan always return IN_PROGRESS. Since our product does not require schedule scan, I ended up disabling schedule scan in driver. Regards Naveen On Mon, Feb 29, 2016 at 2:27 PM, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote: > On 02/29/2016 02:20 PM, Johannes Berg wrote: >> >> On Thu, 2016-02-25 at 10:36 -0800, Ben Greear wrote: > > >>> At least with ath10k, I've seen cases where scan-complete is never >>> sent >>> back to supplicant. I added a timeout at that time that dealt with >>> the issue, >>> not sure it would fix this problem or not. >>> >>> https://github.com/greearb/hostap-ct/commit/913f01e9d0384ed5e99b396f0 >>> 50233d9204dd041 >>> >> >> That won't actually help you much, unless somehow the event got lost >> between cfg80211 and wpa_s; if it never arrived you'll never be allowed >> to scan again and really need to fix ath10k instead. >> >> There's a very slight chance of us failing to allocate memory when >> sending the event; we could attempt to fix that by preallocating? But >> it cannot actually happen since small GFP_KERNEL apparently can't >> actually fail. > > > It's been a year or two, but I think the issue was that firmware crashed > during scan, and the ath10k driver didn't do some sort of cleanup properly. > > Note that supplicant RX buffers for netlink socket in supplicant could also > overflow > and cause pkt loss there, but I don't know if that was what was > happening in my case. > > Either way, I haven't had this problem any time recently, so either > the firmware/driver/stack is fixed (I don't see any firmware scan > crashes anymore, for instance), or my work-around in supplicant > is sufficient. > > Thanks, > Ben > > > -- > Ben Greear <greearb@xxxxxxxxxxxxxxx> > Candela Technologies Inc http://www.candelatech.com > > > _______________________________________________ > Hostap mailing list > Hostap@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/hostap _______________________________________________ Hostap mailing list Hostap@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/hostap