<p><b>@miri64</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/8276#discussion_r307270257">sys/net/gnrc/netif/ieee802154/gnrc_netif_ieee802154.c</a>:</p>
<pre style='color:#555'>> @@ -90,7 +90,7 @@ static inline bool _already_received(gnrc_netif_t *netif,
 static gnrc_pktsnip_t *_recv(gnrc_netif_t *netif)
 {
     netdev_t *dev = netif->dev;
-    netdev_ieee802154_rx_info_t rx_info;
+    netdev_ieee802154_rx_info_t rx_info = { .crc_valid = 0 };
</pre>
<blockquote>
<p>In that case, .crc needs to be set to a value !=0. Where does this happen? Or did I misunderstand something?</p>
</blockquote>
<p>It the drivers. However, this PR only ports the <code>cc2420</code>. That's why I and <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=1260616" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/jia200x">@jia200x</a> suggested that <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=2265899" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/roberthartung">@roberthartung</a> adds the big fat warning to the doc of that field. Requiring all the drivers to be ported in this PR would explode this PR.</p>

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