[PATCH 4.20 63/88] cfg80211: extend range deviation for DMG

From: Greg Kroah-Hartman
Date: Mon Mar 04 2019 - 03:34:58 EST


4.20-stable review patch. If anyone has any objections, please let me know.

------------------

[ Upstream commit 93183bdbe73bbdd03e9566c8dc37c9d06b0d0db6 ]

Recently, DMG frequency bands have been extended till 71GHz, so extend
the range check till 20GHz (45-71GHZ), else some channels will be marked
as disabled.

Signed-off-by: Chaitanya Tata <Chaitanya.Tata@xxxxxxxxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/wireless/reg.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index ecfb1a06dbb2b..cce4c16eaaa0d 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1255,7 +1255,7 @@ static bool is_valid_rd(const struct ieee80211_regdomain *rd)
* definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
* however it is safe for now to assume that a frequency rule should not be
* part of a frequency's band if the start freq or end freq are off by more
- * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the
+ * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
* 60 GHz band.
* This resolution can be lowered and should be considered as we add
* regulatory rule support for other "bands".
@@ -1270,7 +1270,7 @@ static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
* with the Channel starting frequency above 45 GHz.
*/
u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
- 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
+ 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
return true;
if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
--
2.19.1