Patch eeca9fce1d71a4955855ceb0c3b13c1eb9db27c1 (cfg80211: Schedule timeout for all CRDA call) introduced a regression, where in case that crda is not installed (or not configured properly etc.), the regulatory core will needlessly continue to call it, polluting the log with the following log:
"cfg80211: Calling CRDA to update world regulatory domain" Fix this by limiting the number of continuous CRDA request failures. Signed-off-by: Ilan Peer <[email protected]> --- net/wireless/nl80211.c | 2 +- net/wireless/reg.c | 32 ++++++++++++++++++++++++++++---- net/wireless/reg.h | 9 ++++++++- 3 files changed, 37 insertions(+), 6 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b020853..3f4c768 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5655,7 +5655,7 @@ static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info) } } - r = set_regdom(rd); + r = set_regdom(rd, REGD_SOURCE_CRDA); /* set_regdom took ownership */ rd = NULL; diff --git a/net/wireless/reg.c b/net/wireless/reg.c index 8c6cf52..cfed9db 100644 --- a/net/wireless/reg.c +++ b/net/wireless/reg.c @@ -135,6 +135,11 @@ static spinlock_t reg_indoor_lock; /* Used to track the userspace process controlling the indoor setting */ static u32 reg_is_indoor_portid; +/* Max number of consecutive attempts to communicate with CRDA */ +#define REG_MAX_CRDA_TIMEOUTS 3 + +static u32 reg_crda_timeouts; + static const struct ieee80211_regdomain *get_cfg80211_regdom(void) { return rtnl_dereference(cfg80211_regdomain); @@ -485,7 +490,7 @@ static void reg_regdb_search(struct work_struct *work) mutex_unlock(®_regdb_search_mutex); if (!IS_ERR_OR_NULL(regdom)) - set_regdom(regdom); + set_regdom(regdom, REGD_SOURCE_INTERNAL_DB); rtnl_unlock(); } @@ -536,14 +541,19 @@ static int call_crda(const char *alpha2) alpha2[0], alpha2[1]); if (!is_world_regdom((char *) alpha2)) - pr_info("Calling CRDA for country: %c%c\n", + pr_info("Update country=%c%c\n", alpha2[0], alpha2[1]); else - pr_info("Calling CRDA to update world regulatory domain\n"); + pr_info("Update to world regulatory domain\n"); /* query internal regulatory database (if it exists) */ reg_regdb_query(alpha2); + if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { + pr_info("Exceeded CRDA call max attempts. Not calling CRDA\n"); + return -EINVAL; + } + return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); } @@ -2293,6 +2303,9 @@ int regulatory_hint_user(const char *alpha2, request->initiator = NL80211_REGDOM_SET_BY_USER; request->user_reg_hint_type = user_reg_hint_type; + /* Allow calling CRDA again */ + reg_crda_timeouts = 0; + queue_regulatory_request(request); return 0; @@ -2362,6 +2375,9 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2) request->alpha2[1] = alpha2[1]; request->initiator = NL80211_REGDOM_SET_BY_DRIVER; + /* Allow calling CRDA again */ + reg_crda_timeouts = 0; + queue_regulatory_request(request); return 0; @@ -2415,6 +2431,9 @@ void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; request->country_ie_env = env; + /* Allow calling CRDA again */ + reg_crda_timeouts = 0; + queue_regulatory_request(request); request = NULL; out: @@ -2893,7 +2912,8 @@ static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, * multiple drivers can be ironed out later. Caller must've already * kmalloc'd the rd structure. */ -int set_regdom(const struct ieee80211_regdomain *rd) +int set_regdom(const struct ieee80211_regdomain *rd, + enum ieee80211_regd_source regd_src) { struct regulatory_request *lr; bool user_reset = false; @@ -2904,6 +2924,9 @@ int set_regdom(const struct ieee80211_regdomain *rd) return -EINVAL; } + if (regd_src == REGD_SOURCE_CRDA) + reg_crda_timeouts = 0; + lr = get_last_request(); /* Note that this doesn't update the wiphys, this is done below */ @@ -3063,6 +3086,7 @@ static void reg_timeout_work(struct work_struct *work) { REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); rtnl_lock(); + reg_crda_timeouts++; restore_regulatory_settings(true); rtnl_unlock(); } diff --git a/net/wireless/reg.h b/net/wireless/reg.h index a2c4e16..3f310a5 100644 --- a/net/wireless/reg.h +++ b/net/wireless/reg.h @@ -16,6 +16,11 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +enum ieee80211_regd_source { + REGD_SOURCE_INTERNAL_DB = 0, + REGD_SOURCE_CRDA, +}; + extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain; bool reg_is_valid_request(const char *alpha2); @@ -46,7 +51,9 @@ void wiphy_regulatory_deregister(struct wiphy *wiphy); int __init regulatory_init(void); void regulatory_exit(void); -int set_regdom(const struct ieee80211_regdomain *rd); +int set_regdom(const struct ieee80211_regdomain *rd, + enum ieee80211_regd_source regd_src); + unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, const struct ieee80211_reg_rule *rule); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
