From c8a16c68ef4eb7817e41759c7105678ebc155377 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Sat, 9 Oct 2010 21:37:11 +0200 Subject: [PATCH] carl9170: common error path for bad frames This patch replaces several identical frame drop paths with a single shared rx frame error handler. Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/carl9170/rx.c | 48 ++++++++++++++-------------------- 1 file changed, 20 insertions(+), 28 deletions(-) diff --git a/drivers/net/wireless/ath/carl9170/rx.c b/drivers/net/wireless/ath/carl9170/rx.c index 671dbc4..31287e0 100644 --- a/drivers/net/wireless/ath/carl9170/rx.c +++ b/drivers/net/wireless/ath/carl9170/rx.c @@ -598,18 +598,14 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) if (!IS_STARTED(ar)) return; - if (unlikely(len < sizeof(*mac))) { - ar->rx_dropped++; - return; - } + if (unlikely(len < sizeof(*mac))) + goto drop; mpdu_len = len - sizeof(*mac); mac = (void *)(buf + mpdu_len); - if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) { - ar->rx_dropped++; - return; - } + if (unlikely(mac->error & AR9170_RX_ERROR_FATAL)) + goto drop; switch (mac->status & AR9170_RX_STATUS_MPDU) { case AR9170_RX_STATUS_MPDU_FIRST: @@ -638,8 +634,7 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) "is clipped.\n"); } - ar->rx_dropped++; - return; + goto drop; } break; @@ -659,8 +654,7 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) "is clipped.\n"); } - ar->rx_dropped++; - return; + goto drop; } case AR9170_RX_STATUS_MPDU_MIDDLE: @@ -672,8 +666,7 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) wiphy_err(ar->hw->wiphy, "rx stream does not start " "with a first_mpdu frame tag.\n"); - ar->rx_dropped++; - return; + goto drop; } head = &ar->rx_plcp; @@ -696,16 +689,12 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) } /* FC + DU + RA + FCS */ - if (unlikely(mpdu_len < (2 + 2 + 6 + FCS_LEN))) { - ar->rx_dropped++; - return; - } + if (unlikely(mpdu_len < (2 + 2 + ETH_ALEN + FCS_LEN))) + goto drop; memset(&status, 0, sizeof(status)); - if (unlikely(carl9170_rx_mac_status(ar, head, mac, &status))) { - ar->rx_dropped++; - return; - } + if (unlikely(carl9170_rx_mac_status(ar, head, mac, &status))) + goto drop; if (phy) carl9170_rx_phy_status(ar, phy, &status); @@ -713,12 +702,15 @@ static void carl9170_handle_mpdu(struct ar9170 *ar, u8 *buf, int len) carl9170_ps_beacon(ar, buf, mpdu_len); skb = carl9170_rx_copy_data(buf, mpdu_len); - if (likely(skb)) { - memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); - ieee80211_rx(ar->hw, skb); - } else { - ar->rx_dropped++; - } + if (!skb) + goto drop; + + memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); + ieee80211_rx(ar->hw, skb); + return; + +drop: + ar->rx_dropped++; } static void carl9170_rx_untie_cmds(struct ar9170 *ar, const u8 *respbuf, -- 2.7.4