[RFC 0/2] Scheduled scan timeout and notify scheduled scan stop

[Jouni Malinen]

On Fri, Dec 13, 2024 at 07:56:28PM +0200, Jussi Laakkonen wrote:
> This RFC patchset contains changes to address the issue with WLAN
> drivers, which may not stop the initiated scheduled scans, or to provide
> results on them. This has been noticed to happen with sprd-wlan driver on
> MT6762 chipset.

Unfortunately I'm not very familiar with how various drivers and vendors
have implemented scheduled scanning and the related nl80211
commands/events. Has this issue been discussed with the particular
vendor referenced here? If not, it would be good to do so and try to see
whether the driver could be fixed to follow what the nl80211 interface
is documented to do for scheduled scans.

> In the internal testing this has shown to solve the issue, but without
> the detailed knowledge whether this is a correct approach or not, the
> changes should receive more comments on how to do this properly. On well
> behaving drivers this does not seem to be an issue, so might these
> changes be better serving their purpose as an option configurable on
> build time instead of being like presented here.

It is interested that the option of fixing the driver is not even
considered here.. That should be the first goal. If that can be clearly
shown to be impossible, some workarounds could be considered, but I do
not think extra complexity in user space to avoid issues with
misbehaving drivers is a good approach and that should be avoiding.
 
-- 
Jouni Malinen                                            PGP id EFC895FA