33 lines
737 B
Diff
33 lines
737 B
Diff
--- a/drivers/net/wireless/ath/ath9k/main.c
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+++ b/drivers/net/wireless/ath/ath9k/main.c
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@@ -1840,12 +1840,29 @@ static u32 fill_chainmask(u32 cap, u32 n
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return filled;
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}
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+static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
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+{
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+ switch (val & 0x7) {
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+ case 0x1:
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+ case 0x3:
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+ case 0x7:
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+ return true;
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+ case 0x2:
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+ return (ah->caps.rx_chainmask == 1);
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+ default:
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+ return false;
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+ }
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+}
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+
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static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
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{
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struct ath_softc *sc = hw->priv;
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struct ath_hw *ah = sc->sc_ah;
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- if (!rx_ant || !tx_ant)
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+ if (ah->caps.rx_chainmask != 1)
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+ rx_ant |= tx_ant;
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+
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+ if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
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return -EINVAL;
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sc->ant_rx = rx_ant;
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