Hi Michal, FYI, kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git wip head: 6c18fc6dd15914ea1e088514300196d07ee95771 commit: d579a5560c3ef86f047f8d02f21a2b9a318bcc7e [69/79] mac80211: use channel context notifications config: x86_64-randconfig-s314 (attached as .config) All related error/warning messages: net/mac80211/chan.c: In function 'ieee80211_new_chanctx': net/mac80211/chan.c:220:2: error: 'err' undeclared (first use in this function) net/mac80211/chan.c:220:2: note: each undeclared identifier is reported only once for each function it appears in vim +220 net/mac80211/chan.c 215 216 ctx->conf.channel = channel; 217 ctx->conf.channel_type = channel_type; 218 ctx->mode = mode; 219 > 220 err = drv_add_chanctx(local, ctx); 221 if (err) { 222 kfree(ctx); 223 return ERR_PTR(err); 224 } 225 --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation