ieee80211: Introduce ieee80211_is_first_frag

Signed-off-by: Helmut Schaa <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

include/linux/ieee80211.h

···
 	       cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_QOS_NULLFUNC);
 }
 
+/**
+ * ieee80211_is_first_frag - check if IEEE80211_SCTL_FRAG is not set
+ * @seq_ctrl: frame sequence control bytes in little-endian byteorder
+ */
+static inline int ieee80211_is_first_frag(__le16 seq_ctrl)
+{
+	return (seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)) == 0;
+}
+
 struct ieee80211s_hdr {
 	u8 flags;
 	u8 ttl;