From: Pascal Terjan Date: Tue, 19 May 2020 15:00:42 +0000 (+0100) Subject: staging: rtl8192u: Merge almost duplicate code X-Git-Tag: v5.15~3664^2~55 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8da047603bbcfddda6eb6ebbee0dc52c34badc6e;p=platform%2Fkernel%2Flinux-starfive.git staging: rtl8192u: Merge almost duplicate code This causes a change in behaviour: - stats also get updated when reordering, this seems like it should be the case but those lines were commented out. - sub_skb NULL check now happens early in both cases, previously it happened only after dereferencing it 12 times, so it may not actually be needed. Signed-off-by: Pascal Terjan Link: https://lore.kernel.org/r/20200519150042.199690-1-pterjan@google.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c index e101f7b..195d963 100644 --- a/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c +++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c @@ -520,55 +520,68 @@ static bool AddReorderEntry(struct rx_ts_record *pTS, struct rx_reorder_entry *p return true; } -void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb **prxbIndicateArray, u8 index) +static void indicate_packets(struct ieee80211_device *ieee, + struct ieee80211_rxb *rxb) { - u8 i = 0, j = 0; + struct net_device_stats *stats = &ieee->stats; + struct net_device *dev = ieee->dev; u16 ethertype; -// if(index > 1) -// IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__func__,index); - for (j = 0; j < index; j++) { -//added by amy for reorder - struct ieee80211_rxb *prxb = prxbIndicateArray[j]; - for (i = 0; i < prxb->nr_subframes; i++) { - struct sk_buff *sub_skb = prxb->subframes[i]; + u8 i; + + for (i = 0; i < rxb->nr_subframes; i++) { + struct sk_buff *sub_skb = rxb->subframes[i]; + + if (!sub_skb) + continue; /* convert hdr + possible LLC headers into Ethernet header */ - ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; - if (sub_skb->len >= 8 && - ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && - ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || - memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { + ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; + if (sub_skb->len >= 8 && + ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) && + ethertype != ETH_P_AARP && + ethertype != ETH_P_IPX) || + !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) { /* remove RFC1042 or Bridge-Tunnel encapsulation and * replace EtherType */ - skb_pull(sub_skb, SNAP_SIZE); - memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); - memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); - } else { + skb_pull(sub_skb, SNAP_SIZE); + } else { /* Leave Ethernet header part of hdr and full payload */ - put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2)); - memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN); - memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN); - } - //stats->rx_packets++; - //stats->rx_bytes += sub_skb->len; + put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2)); + } + memcpy(skb_push(sub_skb, ETH_ALEN), rxb->src, ETH_ALEN); + memcpy(skb_push(sub_skb, ETH_ALEN), rxb->dst, ETH_ALEN); + + stats->rx_packets++; + stats->rx_bytes += sub_skb->len; + if (is_multicast_ether_addr(rxb->dst)) + stats->multicast++; /* Indicate the packets to upper layer */ - if (sub_skb) { - sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev); - memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); - sub_skb->dev = ieee->dev; - sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ - //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */ - ieee->last_rx_ps_time = jiffies; - netif_rx(sub_skb); - } - } + sub_skb->protocol = eth_type_trans(sub_skb, dev); + memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); + sub_skb->dev = dev; + /* 802.11 crc not sufficient */ + sub_skb->ip_summed = CHECKSUM_NONE; + ieee->last_rx_ps_time = jiffies; + netif_rx(sub_skb); + } +} + +void ieee80211_indicate_packets(struct ieee80211_device *ieee, + struct ieee80211_rxb **prxbIndicateArray, + u8 index) +{ + u8 i; + + for (i = 0; i < index; i++) { + struct ieee80211_rxb *prxb = prxbIndicateArray[i]; + + indicate_packets(ieee, prxb); kfree(prxb); prxb = NULL; } } - static void RxReorderIndicatePacket(struct ieee80211_device *ieee, struct ieee80211_rxb *prxb, struct rx_ts_record *pTS, u16 SeqNum) @@ -877,7 +890,6 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, u16 fc, type, stype, sc; struct net_device_stats *stats; unsigned int frag; - u16 ethertype; //added by amy for reorder u8 TID = 0; u16 SeqNum = 0; @@ -1260,47 +1272,7 @@ int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb, //added by amy for reorder if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) { -//added by amy for reorder - for (i = 0; i < rxb->nr_subframes; i++) { - struct sk_buff *sub_skb = rxb->subframes[i]; - - if (sub_skb) { - /* convert hdr + possible LLC headers into Ethernet header */ - ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7]; - if (sub_skb->len >= 8 && - ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 && - ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) || - memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) { - /* remove RFC1042 or Bridge-Tunnel encapsulation and - * replace EtherType */ - skb_pull(sub_skb, SNAP_SIZE); - memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); - memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); - } else { - u16 len; - /* Leave Ethernet header part of hdr and full payload */ - len = be16_to_cpu(htons(sub_skb->len)); - memcpy(skb_push(sub_skb, 2), &len, 2); - memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN); - memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN); - } - - stats->rx_packets++; - stats->rx_bytes += sub_skb->len; - if (is_multicast_ether_addr(dst)) { - stats->multicast++; - } - - /* Indicate the packets to upper layer */ - sub_skb->protocol = eth_type_trans(sub_skb, dev); - memset(sub_skb->cb, 0, sizeof(sub_skb->cb)); - sub_skb->dev = dev; - sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */ - //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */ - ieee->last_rx_ps_time = jiffies; - netif_rx(sub_skb); - } - } + indicate_packets(ieee, rxb); kfree(rxb); rxb = NULL;