mac80211: split hardware scan by band

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There's currently a very odd bug in mac80211 -- a
hardware scan that is done while the hardware is
really operating on 2.4 GHz will include CCK rates
in the probe request frame, even on 5 GHz (if the
driver uses the mac80211 IEs). Vice versa, if the
hardware is operating on 5 GHz the 2.4 GHz probe
requests will not include CCK rates even though
they should.

Fix this by splitting up cfg80211 scan requests by
band -- recalculating the IEs every time -- and
requesting only per-band scans from the driver.

Apparently this bug hasn't been a problem yet, but
it is imaginable that some older access points get
confused if confronted with such behaviour.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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This commit is contained in:

Johannes Berg 2009-10-27 20:59:55 +01:00 • committed by John W. Linville

parent b59f04cbf8

commit 4d36ec5823

3 changed files with 80 additions and 32 deletions

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8

net/mac80211/ieee80211_i.h

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96

net/mac80211/scan.c

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8

net/mac80211/util.c

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