mac80211: use compare_ether_addr on MAC addresses instead of memcmp
Because of the constant size and guaranteed 16 bit alignment, the inline
compare_ether_addr function is much cheaper than calling memcmp.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index caf97f5..7190da4 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1822,7 +1822,7 @@
memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
- if (memcmp(bssid, mgmt->bssid, ETH_ALEN))
+ if (compare_ether_addr(bssid, mgmt->bssid))
return RX_MGMT_NONE;
auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
@@ -1903,7 +1903,7 @@
return RX_MGMT_NONE;
if (!ifmgd->associated ||
- memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
+ compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
return RX_MGMT_NONE;
bssid = ifmgd->associated->bssid;
@@ -1936,7 +1936,7 @@
return RX_MGMT_NONE;
if (!ifmgd->associated ||
- memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
+ compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
return RX_MGMT_NONE;
reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
@@ -2203,7 +2203,7 @@
if (!assoc_data)
return RX_MGMT_NONE;
- if (memcmp(assoc_data->bss->bssid, mgmt->bssid, ETH_ALEN))
+ if (compare_ether_addr(assoc_data->bss->bssid, mgmt->bssid))
return RX_MGMT_NONE;
/*
@@ -2291,8 +2291,8 @@
bool need_ps = false;
if (sdata->u.mgd.associated &&
- memcmp(mgmt->bssid, sdata->u.mgd.associated->bssid,
- ETH_ALEN) == 0) {
+ compare_ether_addr(mgmt->bssid, sdata->u.mgd.associated->bssid)
+ == 0) {
bss = (void *)sdata->u.mgd.associated->priv;
/* not previously set so we may need to recalc */
need_ps = !bss->dtim_period;
@@ -2347,7 +2347,7 @@
ASSERT_MGD_MTX(ifmgd);
- if (memcmp(mgmt->da, sdata->vif.addr, ETH_ALEN))
+ if (compare_ether_addr(mgmt->da, sdata->vif.addr))
return; /* ignore ProbeResp to foreign address */
baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
@@ -2360,11 +2360,12 @@
ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems, false);
if (ifmgd->associated &&
- memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN) == 0)
+ compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid) == 0)
ieee80211_reset_ap_probe(sdata);
if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
- memcmp(mgmt->bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN) == 0) {
+ compare_ether_addr(mgmt->bssid, ifmgd->auth_data->bss->bssid)
+ == 0) {
/* got probe response, continue with auth */
printk(KERN_DEBUG "%s: direct probe responded\n", sdata->name);
ifmgd->auth_data->tries = 0;
@@ -2421,7 +2422,8 @@
return;
if (ifmgd->assoc_data && !ifmgd->assoc_data->have_beacon &&
- memcmp(mgmt->bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN) == 0) {
+ compare_ether_addr(mgmt->bssid, ifmgd->assoc_data->bss->bssid)
+ == 0) {
ieee802_11_parse_elems(mgmt->u.beacon.variable,
len - baselen, &elems);
@@ -2436,7 +2438,7 @@
}
if (!ifmgd->associated ||
- memcmp(mgmt->bssid, ifmgd->associated->bssid, ETH_ALEN))
+ compare_ether_addr(mgmt->bssid, ifmgd->associated->bssid))
return;
bssid = ifmgd->associated->bssid;
@@ -3299,7 +3301,7 @@
bool match;
/* keep sta info, bssid if matching */
- match = memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN) == 0;
+ match = compare_ether_addr(ifmgd->bssid, req->bss->bssid) == 0;
ieee80211_destroy_auth_data(sdata, match);
}
@@ -3421,7 +3423,7 @@
goto err_clear;
}
} else
- WARN_ON_ONCE(memcmp(ifmgd->bssid, req->bss->bssid, ETH_ALEN));
+ WARN_ON_ONCE(compare_ether_addr(ifmgd->bssid, req->bss->bssid));
if (!bss->dtim_period &&
sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_PERIOD) {
@@ -3471,7 +3473,7 @@
sdata->name, req->bssid, req->reason_code);
if (ifmgd->associated &&
- memcmp(ifmgd->associated->bssid, req->bssid, ETH_ALEN) == 0)
+ compare_ether_addr(ifmgd->associated->bssid, req->bssid) == 0)
ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
req->reason_code, true, frame_buf);
else