net/mac80211/tx.c:1930:21: warning: 'chanctx_conf' may be used uninitializ

Hi Johannes,

There are new compile warnings show up in

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git wip
head:   161206c4a3427bfb364e924454d5267e175e9b9b
commit: 71e414d5d526fec40144af3e8c4c25b08ae52dd6 [48/49] mac80211: use channel contexts

All error/warnings:

net/mac80211/tx.c: In function 'ieee80211_subif_start_xmit':
net/mac80211/tx.c:1930:21: warning: 'chanctx_conf' may be used uninitialized in this function [-Wmaybe-uninitialized]

It's conditionally assigned to in this chunk:

        case NL80211_IFTYPE_AP:
                fc |= cpu_to_le16(IEEE80211_FCTL_FROMDS);
                /* DA BSSID SA */
                memcpy(hdr.addr1, skb->data, ETH_ALEN);
                memcpy(hdr.addr2, sdata->vif.addr, ETH_ALEN);
                memcpy(hdr.addr3, skb->data + ETH_ALEN, ETH_ALEN);
                hdrlen = 24;
+               if (sdata->vif.type = NL80211_IFTYPE_AP)
+                       chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
                break;

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0-DAY kernel build testing backend Open Source Technology Centre
Fengguang Wu <[email protected]> Intel Corporation

Am 31.07.2012 17:13, schrieb Fengguang Wu: