| Message ID | 20190603114127.GA8091@a1-hr (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Delegated to: | Johannes Berg |
| Headers | show |
| Series | Revert "cfg80211: fix processing world regdomain when non modular" | expand |
diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 4831ad745f91..b00ebf6fc696 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -2788,7 +2788,7 @@ static void reg_process_pending_hints(void) /* When last_request->processed becomes true this will be rescheduled */ if (lr && !lr->processed) { - reg_process_hint(lr); + REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); return; }
This reverts commit 96cce12ff6e0bc9d9fcb2235e08b7fc150f96fd2. Re-triggering a reg_process_hint with the last request on all events, can make the regulatory domain fail in case of multiple WiFi modules. On slower boards (espacially with mdev), enumeration of the WiFi modules can end up in an intersected regulatory domain, and user cannot set it with 'iw reg set' anymore. This is happening, because: - 1st module enumerates, queues up a regulatory request - request gets processed by __reg_process_hint_driver(): - checks if previous was set by CORE -> yes - checks if regulator domain changed -> yes, from '00' to e.g. 'US' -> sends request to the 'crda' - 2nd module enumerates, queues up a regulator request (which triggers the reg_todo() work) - reg_todo() -> reg_process_pending_hints() sees, that the last request is not processed yet, so it tries to process it again. __reg_process_hint driver() will run again, and: - checks if the last request's initiator was the core -> no, it was the driver (1st WiFi module) - checks, if the previous initiator was the driver -> yes - checks if the regulator domain changed -> yes, it was '00' (set by core, and crda call did not return yet), and should be changed to 'US' ------> __reg_process_hint_driver calls an intersect Besides, the reg_process_hint call with the last request is meaningless since the crda call has a timeout work. If that timeout expires, the first module's request will lost. Signed-off-by: Robert Hodaszi <robert.hodaszi@digi.com> --- net/wireless/reg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)