rtlwifi: properly apply filter flags

commit 0baa0fd76f3f5a134461d6cf30294f6bb1bb824c
("rtlwifi: Convert core routines for addition of rtl8192se and
rtl8192de") removed setting HW_VAR_RCR, HW_VAR_MGT_FILTER and
HW_VAR_CTRL_FILTER. The last two are probably done because some hardware
does not support them. The first is probably a mistake. This patch adds
the missing set_hw_reg call.

For PCI support, rx_conf is not touched directly. Instead, get_hw_reg is
used to abstract between receive_config (for PCI) and rx_conf (for USB).

This was tested on a 10ec:8176 Realtek RTL8188CE (according to the
label on the mini-PCIe card). Before this patch, `iw wlan0 set monitor
otherbss` did not capture frames from other BSS's. After this patch, it
does print packets.

Tested-by: Peter Wu <lekensteyn@gmail.com>
Signed-off-by: Peter Wu <lekensteyn@gmail.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtlwifi/core.c

@@ -475,20 +475,40 @@ static void rtl_op_configure_filter(struct ieee80211_hw *hw,
 {
 	struct rtl_priv *rtlpriv = rtl_priv(hw);
 	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
+	u32 rx_conf;
 
 	*new_flags &= RTL_SUPPORTED_FILTERS;
 	if (!changed_flags)
 		return;
 
+	/* if ssid not set to hw don't check bssid
+	 * here just used for linked scanning, & linked
+	 * and nolink check bssid is set in set network_type */
+	if ((changed_flags & FIF_BCN_PRBRESP_PROMISC) &&
+		(mac->link_state >= MAC80211_LINKED)) {
+		if (mac->opmode != NL80211_IFTYPE_AP &&
+		    mac->opmode != NL80211_IFTYPE_MESH_POINT) {
+			if (*new_flags & FIF_BCN_PRBRESP_PROMISC) {
+				rtlpriv->cfg->ops->set_chk_bssid(hw, false);
+			} else {
+				rtlpriv->cfg->ops->set_chk_bssid(hw, true);
+			}
+		}
+	}
+
+	/* must be called after set_chk_bssid since that function modifies the
+	 * RCR register too. */
+	rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *)(&rx_conf));
+
 	/*TODO: we disable broadcase now, so enable here */
 	if (changed_flags & FIF_ALLMULTI) {
 		if (*new_flags & FIF_ALLMULTI) {
-			mac->rx_conf |= rtlpriv->cfg->maps[MAC_RCR_AM] |
+			rx_conf |= rtlpriv->cfg->maps[MAC_RCR_AM] |
 			    rtlpriv->cfg->maps[MAC_RCR_AB];
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Enable receive multicast frame\n");
 		} else {
-			mac->rx_conf &= ~(rtlpriv->cfg->maps[MAC_RCR_AM] |
+			rx_conf &= ~(rtlpriv->cfg->maps[MAC_RCR_AM] |
 					  rtlpriv->cfg->maps[MAC_RCR_AB]);
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Disable receive multicast frame\n");
@@ -497,39 +517,25 @@ static void rtl_op_configure_filter(struct ieee80211_hw *hw,
 
 	if (changed_flags & FIF_FCSFAIL) {
 		if (*new_flags & FIF_FCSFAIL) {
-			mac->rx_conf |= rtlpriv->cfg->maps[MAC_RCR_ACRC32];
+			rx_conf |= rtlpriv->cfg->maps[MAC_RCR_ACRC32];
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Enable receive FCS error frame\n");
 		} else {
-			mac->rx_conf &= ~rtlpriv->cfg->maps[MAC_RCR_ACRC32];
+			rx_conf &= ~rtlpriv->cfg->maps[MAC_RCR_ACRC32];
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Disable receive FCS error frame\n");
 		}
 	}
 
-	/* if ssid not set to hw don't check bssid
-	 * here just used for linked scanning, & linked
-	 * and nolink check bssid is set in set network_type */
-	if ((changed_flags & FIF_BCN_PRBRESP_PROMISC) &&
-		(mac->link_state >= MAC80211_LINKED)) {
-		if (mac->opmode != NL80211_IFTYPE_AP &&
-		    mac->opmode != NL80211_IFTYPE_MESH_POINT) {
-			if (*new_flags & FIF_BCN_PRBRESP_PROMISC) {
-				rtlpriv->cfg->ops->set_chk_bssid(hw, false);
-			} else {
-				rtlpriv->cfg->ops->set_chk_bssid(hw, true);
-			}
-		}
-	}
 
 	if (changed_flags & FIF_CONTROL) {
 		if (*new_flags & FIF_CONTROL) {
-			mac->rx_conf |= rtlpriv->cfg->maps[MAC_RCR_ACF];
+			rx_conf |= rtlpriv->cfg->maps[MAC_RCR_ACF];
 
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Enable receive control frame\n");
 		} else {
-			mac->rx_conf &= ~rtlpriv->cfg->maps[MAC_RCR_ACF];
+			rx_conf &= ~rtlpriv->cfg->maps[MAC_RCR_ACF];
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Disable receive control frame\n");
 		}
@@ -537,15 +543,17 @@ static void rtl_op_configure_filter(struct ieee80211_hw *hw,
 
 	if (changed_flags & FIF_OTHER_BSS) {
 		if (*new_flags & FIF_OTHER_BSS) {
-			mac->rx_conf |= rtlpriv->cfg->maps[MAC_RCR_AAP];
+			rx_conf |= rtlpriv->cfg->maps[MAC_RCR_AAP];
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Enable receive other BSS's frame\n");
 		} else {
-			mac->rx_conf &= ~rtlpriv->cfg->maps[MAC_RCR_AAP];
+			rx_conf &= ~rtlpriv->cfg->maps[MAC_RCR_AAP];
 			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
 				 "Disable receive other BSS's frame\n");
 		}
 	}
+
+	rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RCR, (u8 *)(&rx_conf));
 }
 static int rtl_op_sta_add(struct ieee80211_hw *hw,
 			 struct ieee80211_vif *vif,