Currently, self managed drivers cannot update the global regulatory
using a regulatory hint from driver if the wiphy regd is already set
from other sources.
Due to this, when a regulatory hint is provided to cfg80211 from
self managed devices, the request gets ignored and global reg is
always at default, i.e World reg, DFS-UNSET.
Hence in such systems, the result of 'iw reg get' does not indicate a
valid global regd.
Hence, Allow setting the cfg80211 global regulatory when it is unset
and the requestor is a self managed device. At the same time, do not
propagate these hints to other devices in the system.
Signed-off-by: Sriram R <srirrama@xxxxxxxxxxxxxx>
---
net/wireless/reg.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 646107a..86c4460 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -3550,6 +3550,20 @@ static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
if (!request_wiphy)
return -ENODEV;
+ /* Update cfg80211 regdomain only if it's unset, in case a hint
+ * is received from self managed wiphy. Ignore all other
+ * processing from self managed wiphy's. Return EALREADY to avoid
+ * updating other drivers.
+ */
+ if (request_wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
+ regd = get_cfg80211_regdom();
+
+ if (regd == cfg80211_world_regdom) {
+ reset_regdomains(false, rd);
+ }
+ return -EALREADY;
+ }
+
if (!driver_request->intersect) {
if (request_wiphy->regd)
return -EALREADY;
--
2.7.4
