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FS#643 - iwinfo scan reports "Scanning not possible" using mt76 mac80211 driver #8003

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openwrt-bot opened this issue Mar 19, 2017 · 0 comments
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fherbert:

I'm unable to consistently scan for access points using iwinfo.
I'm running a MT7688 chip with the mt76 mac80211 driver on LED 17.01

The scan works very intermittently, but mostly returns "Scanning not possible".

My wireless config looks like:
config wifi-device 'radio0'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path 'platform/10300000.wmac'
option htmode 'HT20'
option disabled '0'

I've added some debugging code to iwinfo_nl80211.c to try and see where it's failing. To run a scan I use the command: iwinfo radio0 scan
iwinfo creates a temporary interface (tmp.radio0) and then calls nl80211_get_scanlist_nl, this returns a zero length iwinfo_scanlist_entry which causes "Scanning not possible" to be returned.
I'm happy to do some more debugging if I can be pointed in the right direction.

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