[PATCH] zd1211rw: fix filter for PSPOLL frames

While filling the control set the driver tests for a PSPOLL frame.
But it tested only the subtype of the packet. The full type needs
to be tested to identify those packets reliably.

[dsd@gentoo.org: backport to mainline]
Signed-off-by: Ulrich Kunitz <kune@deine-taler.de>
Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/zd1211rw/zd_mac.c

@@ -822,7 +822,7 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
 		cs->control |= ZD_CS_MULTICAST;
 
 	/* PS-POLL */
-	if (stype == IEEE80211_STYPE_PSPOLL)
+	if (ftype == IEEE80211_FTYPE_CTL && stype == IEEE80211_STYPE_PSPOLL)
 		cs->control |= ZD_CS_PS_POLL_FRAME;
 
 	/* Unicast data frames over the threshold should have RTS */