This should fix the warning "failed to allocate link cache" when a
new device is added. It doesn't affect WiFi operation, and the
code would fall back to non-nl80211 mechanisms of detecting whether
a device was wifi or not, so it corrects this check and quiets the
error message.
Make the meaning of done actually reflect what's happening,
and make sure that when we get an error in the error handler,
that the processing loop breaks out and returns that error.
This wasn't happening for Ad-Hoc connections, which apparently
return various errors for things, leading to blocking in
recv() in the kernel waiting for more data that would never
come, because we'd already gotten an error.
Would affect non-nl80211 drivers since all nl80211 drivers have the
phyX link in sysfs and thus this code wouldn't get run for them.
Found by Dmitri <mitya@mageia.org>
Clarify how we're supposed to break out of the nl_recvmsgs() loop
and also break out if we get an error from nl_recvmsgs(). What's
supposed to happen is that one of the callbacks we've registered
figures out that we're done and sets the 'done' flag, which then
breaks out of the recvmsgs() loop. Using 'err' there previously
was pretty unclear.
This reverts commit 84403ab84a.
It appears we want to loop until one of the callback says we're
done, while this patch would exit too early (possibly before we'd
received a reply) since nl_recvmsgs() returns 0 on success. What
we really want do do here is wait for one of the callbacks we've
registered to tell us that they've successfully handled the message
and gotten a reply.
