kernel.git/net/wireless/reg.c, branch linux-2.6.37.y

cfg80211: fix disabling channels based on hints

2011-02-17T23:14:02Z

commit ca4ffe8f2848169a8ded0ea8a60b2d81925564c9 upstream. After a module loads you will have loaded the world roaming regulatory domain or a custom regulatory domain. Further regulatory hints are welcomed and should be respected unless the regulatory hint is coming from a country IE as the IEEE spec allows for a country IE to be a subset of what is allowed by the local regulatory agencies. So disable all channels that do not fit a regulatory domain sent from a unless the hint is from a country IE and the country IE had no information about the band we are currently processing. This fixes a few regulatory issues, for example for drivers that depend on CRDA and had no 5 GHz freqencies allowed were not properly disabling 5 GHz at all, furthermore it also allows users to restrict devices further as was intended. If you recieve a country IE upon association we will also disable the channels that are not allowed if the country IE had at least one channel on the respective band we are procesing. This was the original intention behind this design but it was completely overlooked... Cc: David Quan Cc: Jouni Malinen cc: Easwar Krishnan Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

cfg80211: fix allowing country IEs for WIPHY_FLAG_STRICT_REGULATORY

2011-02-17T23:14:02Z

commit 749b527b21465fb079796c03ffb4302584dc31c1 upstream. We should be enabling country IE hints for WIPHY_FLAG_STRICT_REGULATORY even if we haven't yet recieved regulatory domain hint for the driver if it needed one. Without this Country IEs are not passed on to drivers that have set WIPHY_FLAG_STRICT_REGULATORY, today this is just all Atheros chipset drivers: ath5k, ath9k, ar9170, carl9170. This was part of the original design, however it was completely overlooked... Cc: Easwar Krishnan Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

cfg80211: pass the reg hint initiator to helpers

2011-02-17T23:14:02Z

commit 7ca43d03b1291481bdf894bbaec5d580e7684e7d upstream. This is required later. Cc: Easwar Krishnan Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville Signed-off-by: Greg Kroah-Hartman

cfg80211: fix regression on processing country IEs

2010-10-25T18:43:14Z

The patch 4f366c5: wireless: only use alpha2 regulatory information from country IE removed some complex intersection we were always doing between the AP's country IE info and what we got from CRDA. When CRDA sent us back a regulatory domain we would do some sanity checks on that regulatory domain response we just got. Part of these sanity checks included checking that we already had performed an intersection for the request of NL80211_REGDOM_SET_BY_COUNTRY_IE type. This mean that cfg80211 was only processing country IEs for cases where we already had an intersection, but since we removed enforcing this this is no longer required, we should just apply the country IE country hint with the data received from CRDA. This patch has fixes intended for kernels >= 2.6.36. Cc: stable@kernel.org Reported-by: Easwar Krishnan Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville

cfg80211/mac80211: use lockdep_assert_held

2010-09-16T19:46:00Z

Instead of using a WARN_ON(!mutex_is_locked()) use lockdep_assert_held() which compiles away completely when lockdep isn't enabled, and also is a more accurate assertion since it checks that the current thread is holding the mutex. Signed-off-by: Johannes Berg Signed-off-by: John W. Linville

wireless: upcase alpha2 values in queue_regulatory_request

2010-08-16T18:39:47Z

This provides a little more flexibility for human users, and it allows us to use isalpha rather than the custom is_alpha_upper. Signed-off-by: John W. Linville

cfg80211: Update of regulatory request initiator handling

2010-07-28T20:24:01Z

In some cases there could be possible dereferencing freed pointer. The update is intended to avoid this issue. Signed-off-by: Yuri Ershov Signed-off-by: John W. Linville

wireless: remove unneeded variable from regulatory_hint_11d()

2010-07-26T19:32:41Z

The "rd" variable isn't needed any more since 4f366c5dabcb "wireless: only use alpha2 regulatory information from country IE" Signed-off-by: Dan Carpenter Signed-off-by: John W. Linville

wireless: remove unnecessary reg_same_country_ie_hint

2010-07-20T20:49:41Z

"Might as well remove reg_same_country_ie_hint() completely since we already dealt with suspend/resume through the regulatory hint disconnect." -- Luis Reported-by: Luis R. Rodriguez Signed-off-by: John W. Linville

wireless: only use alpha2 regulatory information from country IE

2010-07-20T20:44:35Z

The meaning and/or usage of the country IE is somewhat poorly defined. In practice, this means that regulatory rulesets in a country IE are often incomplete and might be untrustworthy. This removes the code associated with interpreting those rulesets while preserving respect for country "alpha2" codes also contained in the country IE. Signed-off-by: John W. Linville