mt76: Fix comparisons with invalid hardware key index

With gcc 4.1.2:

    drivers/net/wireless/mediatek/mt76/mt76x0/tx.c: In function ‘mt76x0_tx’:
    drivers/net/wireless/mediatek/mt76/mt76x0/tx.c:169: warning: comparison is always true due to limited range of data type
    drivers/net/wireless/mediatek/mt76/mt76x2_tx_common.c: In function ‘mt76x2_tx’:
    drivers/net/wireless/mediatek/mt76/mt76x2_tx_common.c:35: warning: comparison is always true due to limited range of data type

While assigning -1 to a u8 works fine, comparing with -1 does not work
as expected.

Fix this by comparing with 0xff, like is already done in some other
places.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x0/tx.c b/drivers/net/wireless/mediatek/mt76/mt76x0/tx.c
index 751b49c..c45d05d 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76x0/tx.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x0/tx.c
@@ -166,7 +166,7 @@ void mt76x0_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
        if (sta) {
                msta = (struct mt76_sta *) sta->drv_priv;
                wcid = &msta->wcid;
-       } else if (vif && (!info->control.hw_key && wcid->hw_key_idx != -1)) {
+       } else if (vif && (!info->control.hw_key && wcid->hw_key_idx != 0xff)) {
                struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
 
                wcid = &mvif->group_wcid;

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x2_tx_common.c b/drivers/net/wireless/mediatek/mt76/mt76x2_tx_common.c
index 36afb16..c0ca0df 100644 (file)
--- a/drivers/net/wireless/mediatek/mt76/mt76x2_tx_common.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x2_tx_common.c
@@ -32,7 +32,7 @@ void mt76x2_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
                msta = (struct mt76x2_sta *)control->sta->drv_priv;
                wcid = &msta->wcid;
                /* sw encrypted frames */
-               if (!info->control.hw_key && wcid->hw_key_idx != -1)
+               if (!info->control.hw_key && wcid->hw_key_idx != 0xff)
                        control->sta = NULL;
        }