ath9k: fix channel flag / regd issues with multiple cards
Since the regulatory code touches the channel array, it needs to be
copied for each device instance. That way the original channel array
can also be made const.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org [all]
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 11dc3ac..282bb48 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -56,7 +56,7 @@
* on 5 MHz steps, we support the channels which we know
* we have calibration data for all cards though to make
* this static */
-static struct ieee80211_channel ath9k_2ghz_chantable[] = {
+static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
CHAN2G(2412, 0), /* Channel 1 */
CHAN2G(2417, 1), /* Channel 2 */
CHAN2G(2422, 2), /* Channel 3 */
@@ -77,7 +77,7 @@
* on 5 MHz steps, we support the channels which we know
* we have calibration data for all cards though to make
* this static */
-static struct ieee80211_channel ath9k_5ghz_chantable[] = {
+static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
/* _We_ call this UNII 1 */
CHAN5G(5180, 14), /* Channel 36 */
CHAN5G(5200, 15), /* Channel 40 */
@@ -477,10 +477,17 @@
return -EIO;
}
-static void ath9k_init_channels_rates(struct ath_softc *sc)
+static int ath9k_init_channels_rates(struct ath_softc *sc)
{
+ void *channels;
+
if (test_bit(ATH9K_MODE_11G, sc->sc_ah->caps.wireless_modes)) {
- sc->sbands[IEEE80211_BAND_2GHZ].channels = ath9k_2ghz_chantable;
+ channels = kmemdup(ath9k_2ghz_chantable,
+ sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
+ if (!channels)
+ return -ENOMEM;
+
+ sc->sbands[IEEE80211_BAND_2GHZ].channels = channels;
sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
ARRAY_SIZE(ath9k_2ghz_chantable);
@@ -490,7 +497,15 @@
}
if (test_bit(ATH9K_MODE_11A, sc->sc_ah->caps.wireless_modes)) {
- sc->sbands[IEEE80211_BAND_5GHZ].channels = ath9k_5ghz_chantable;
+ channels = kmemdup(ath9k_5ghz_chantable,
+ sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
+ if (!channels) {
+ if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
+ kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
+ return -ENOMEM;
+ }
+
+ sc->sbands[IEEE80211_BAND_5GHZ].channels = channels;
sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
ARRAY_SIZE(ath9k_5ghz_chantable);
@@ -499,6 +514,7 @@
sc->sbands[IEEE80211_BAND_5GHZ].n_bitrates =
ARRAY_SIZE(ath9k_legacy_rates) - 4;
}
+ return 0;
}
static void ath9k_init_misc(struct ath_softc *sc)
@@ -594,8 +610,11 @@
if (ret)
goto err_btcoex;
+ ret = ath9k_init_channels_rates(sc);
+ if (ret)
+ goto err_btcoex;
+
ath9k_init_crypto(sc);
- ath9k_init_channels_rates(sc);
ath9k_init_misc(sc);
return 0;
@@ -755,6 +774,12 @@
{
int i = 0;
+ if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
+ kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
+
+ if (sc->sbands[IEEE80211_BAND_5GHZ].channels)
+ kfree(sc->sbands[IEEE80211_BAND_5GHZ].channels);
+
if ((sc->btcoex.no_stomp_timer) &&
sc->sc_ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);