linux-stable.git/net/wireless/chan.c, branch linux-3.14.y

cfg80211: Fix 160 MHz channels with 80+80 and 160 MHz drivers

2015-01-27T16:18:55+00:00

commit 08f6f147773b23b765b94633a8eaa82e7defcf4c upstream.

The VHT supported channel width field is a two bit integer, not a
bitfield. cfg80211_chandef_usable() was interpreting it incorrectly and
ended up rejecting 160 MHz channel width if the driver indicated support
for both 160 and 80+80 MHz channels.

Fixes: 3d9d1d6656a73 ("nl80211/cfg80211: support VHT channel configuration")
       (however, no real drivers had 160 MHz support it until 3.16)
Signed-off-by: Jouni Malinen 
Signed-off-by: Johannes Berg 
Signed-off-by: Greg Kroah-Hartman

cfg80211: allow beaconing after DFS CAC

2013-11-25T19:50:49+00:00

Allow beconing after we pass Channel Availability Check (CAC).
Allow non-DFS and DFS channels mix. All DFS channels have to
be in NL80211_DFS_AVAILABLE state (pass CAC).

Signed-off-by: Janusz Dziedzic 
Signed-off-by: Johannes Berg

cfg80211: add missing break in cfg80211_get_chan_state()

2013-11-25T19:50:36+00:00

Improve readability of the function by adding the break,
there's no functional impact but it's confusing to fall
through.

Signed-off-by: Johannes Berg

cfg80211: DFS check chandef usable before CAC

2013-11-25T19:49:43+00:00

Check chandef we get in CAC request is usable for CAC.
All channels have to be DFS channels. Allow DFS_USABLE
and DFS_AVAILABLE channels mix. At least one channel
has to be DFS_USABLE (require CAC).

Signed-off-by: Janusz Dziedzic 
Reviewed-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

cfg80211: add helper functions for start/end freq

2013-11-25T19:49:42+00:00

Add helper fuctions for start/end freq.

Signed-off-by: Janusz Dziedzic 
Reviewed-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg

cfg80211: consolidate passive-scan and no-ibss flags

2013-11-25T19:49:35+00:00

These two flags are used for the same purpose, just
combine them into a no-ir flag to annotate no initiating
radiation is allowed.

Old userspace sending either flag will have it treated as
the no-ir flag. To be considerate to older userspace we
also send both the no-ir flag and the old no-ibss flags.
Newer userspace will have to be aware of older kernels.

Update all places in the tree using these flags with the
following semantic patch:

@@
@@
-NL80211_RRF_PASSIVE_SCAN
+NL80211_RRF_NO_IR
@@
@@
-NL80211_RRF_NO_IBSS
+NL80211_RRF_NO_IR
@@
@@
-IEEE80211_CHAN_PASSIVE_SCAN
+IEEE80211_CHAN_NO_IR
@@
@@
-IEEE80211_CHAN_NO_IBSS
+IEEE80211_CHAN_NO_IR
@@
@@
-NL80211_RRF_NO_IR | NL80211_RRF_NO_IR
+NL80211_RRF_NO_IR
@@
@@
-IEEE80211_CHAN_NO_IR | IEEE80211_CHAN_NO_IR
+IEEE80211_CHAN_NO_IR
@@
@@
-(NL80211_RRF_NO_IR)
+NL80211_RRF_NO_IR
@@
@@
-(IEEE80211_CHAN_NO_IR)
+IEEE80211_CHAN_NO_IR

Along with some hand-optimisations in documentation, to
remove duplicates and to fix some indentation.

Signed-off-by: Luis R. Rodriguez 
[do all the driver updates in one go]
Signed-off-by: Johannes Berg

nl80211/cfg80211: enable DFS for IBSS mode

2013-10-28T14:05:21+00:00

To use DFS in IBSS mode, userspace is required to react to radar events.
It can inform nl80211 that it is capable of doing so by adding a
NL80211_ATTR_HANDLE_DFS attribute when joining the IBSS.

This attribute is supplied to let the kernelspace know that the
userspace application can and will handle radar events, e.g. by
intiating channel switches to a valid channel. DFS channels may
only be used if this attribute is supplied and the driver supports
it. Driver support will be checked even if a channel without DFS
will be initially joined, as a DFS channel may be chosen later.

Signed-off-by: Simon Wunderlich 
Signed-off-by: Mathias Kretschmer 
[fix attribute name in commit message]
Signed-off-by: Johannes Berg

cfg80211: export cfg80211_chandef_dfs_required

2013-09-26T11:27:13+00:00

It will be used later by the IBSS CSA implementation of mac80211.

Signed-off-by: Simon Wunderlich 
Signed-off-by: Mathias Kretschmer 
Signed-off-by: Johannes Berg

nl80211/cfg80211: add 5 and 10 MHz defines and wiphy flag

2013-06-18T14:06:50+00:00

Add defines for 5 and 10 MHz channel width and fix channel
handling functions accordingly.

Also check for and report the WIPHY_FLAG_SUPPORTS_5_10_MHZ
capability.

Signed-off-by: Simon Wunderlich 
Signed-off-by: Mathias Kretschmer 
[fix spelling in comment]
Signed-off-by: Johannes Berg

cfg80211: allow drivers to selectively disable 80/160 MHz

2013-02-15T08:41:38+00:00

Some drivers might support 80 or 160 MHz only on some
channels for whatever reason, so allow them to disable
these channel widths. Also maintain the new flags when
regulatory bandwidth limitations would disable these
wide channels.

Reviewed-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg