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path: root/drivers/net/wireless/ath/ath5k
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Diffstat (limited to 'drivers/net/wireless/ath/ath5k')
-rw-r--r--drivers/net/wireless/ath/ath5k/ath5k.h1
-rw-r--r--drivers/net/wireless/ath/ath5k/base.c31
-rw-r--r--drivers/net/wireless/ath/ath5k/mac80211-ops.c2
3 files changed, 31 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index 74bd54d6aceb..85316bb3f8c6 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1285,6 +1285,7 @@ struct ath5k_hw {
#define ATH_STAT_STARTED 3 /* opened & irqs enabled */
unsigned int filter_flags; /* HW flags, AR5K_RX_FILTER_* */
+ unsigned int fif_filter_flags; /* Current FIF_* filter flags */
struct ieee80211_channel *curchan; /* current h/w channel */
u16 nvifs;
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 4b18434ba697..8ad2550bce7f 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -1382,6 +1382,9 @@ ath5k_receive_frame(struct ath5k_hw *ah, struct sk_buff *skb,
rxs->flag = 0;
if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
rxs->flag |= RX_FLAG_MMIC_ERROR;
+ if (unlikely(rs->rs_status & AR5K_RXERR_CRC))
+ rxs->flag |= RX_FLAG_FAILED_FCS_CRC;
+
/*
* always extend the mac timestamp, since this information is
@@ -1449,6 +1452,8 @@ ath5k_receive_frame_ok(struct ath5k_hw *ah, struct ath5k_rx_status *rs)
ah->stats.rx_bytes_count += rs->rs_datalen;
if (unlikely(rs->rs_status)) {
+ unsigned int filters;
+
if (rs->rs_status & AR5K_RXERR_CRC)
ah->stats.rxerr_crc++;
if (rs->rs_status & AR5K_RXERR_FIFO)
@@ -1457,7 +1462,20 @@ ath5k_receive_frame_ok(struct ath5k_hw *ah, struct ath5k_rx_status *rs)
ah->stats.rxerr_phy++;
if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
ah->stats.rxerr_phy_code[rs->rs_phyerr]++;
- return false;
+
+ /*
+ * Treat packets that underwent a CCK or OFDM reset as having a bad CRC.
+ * These restarts happen when the radio resynchronizes to a stronger frame
+ * while receiving a weaker frame. Here we receive the prefix of the weak
+ * frame. Since these are incomplete packets, mark their CRC as invalid.
+ */
+ if (rs->rs_phyerr == AR5K_RX_PHY_ERROR_OFDM_RESTART ||
+ rs->rs_phyerr == AR5K_RX_PHY_ERROR_CCK_RESTART) {
+ rs->rs_status |= AR5K_RXERR_CRC;
+ rs->rs_status &= ~AR5K_RXERR_PHY;
+ } else {
+ return false;
+ }
}
if (rs->rs_status & AR5K_RXERR_DECRYPT) {
/*
@@ -1480,8 +1498,15 @@ ath5k_receive_frame_ok(struct ath5k_hw *ah, struct ath5k_rx_status *rs)
return true;
}
- /* reject any frames with non-crypto errors */
- if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
+ /*
+ * Reject any frames with non-crypto errors, and take into account the
+ * current FIF_* filters.
+ */
+ filters = AR5K_RXERR_DECRYPT;
+ if (ah->fif_filter_flags & FIF_FCSFAIL)
+ filters |= AR5K_RXERR_CRC;
+
+ if (rs->rs_status & ~filters)
return false;
}
diff --git a/drivers/net/wireless/ath/ath5k/mac80211-ops.c b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
index afb23b3cc7be..b65c38fdaa4b 100644
--- a/drivers/net/wireless/ath/ath5k/mac80211-ops.c
+++ b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
@@ -473,6 +473,8 @@ ath5k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
/* Set the cached hw filter flags, this will later actually
* be set in HW */
ah->filter_flags = rfilt;
+ /* Store current FIF filter flags */
+ ah->fif_filter_flags = *new_flags;
mutex_unlock(&ah->lock);
}