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@@ -808,6 +808,18 @@ void iwl_chain_noise_calibration(struct iwl_priv *priv,
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}
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}
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}
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}
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+ /*
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+ * The above algorithm sometimes fails when the ucode
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+ * reports 0 for all chains. It's not clear why that
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+ * happens to start with, but it is then causing trouble
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+ * because this can make us enable more chains than the
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+ * hardware really has.
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+ *
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+ * To be safe, simply mask out any chains that we know
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+ * are not on the device.
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+ */
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+ active_chains &= priv->hw_params.valid_rx_ant;
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+
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num_tx_chains = 0;
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num_tx_chains = 0;
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for (i = 0; i < NUM_RX_CHAINS; i++) {
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for (i = 0; i < NUM_RX_CHAINS; i++) {
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/* loops on all the bits of
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/* loops on all the bits of
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David S. Miller