diff options
| author | Mordechay Goodstein <mordechay.goodstein@intel.com> | 2019-11-07 13:51:47 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2019-11-08 21:33:37 +0200 |
| commit | cb1a4badf59275eb7221dcec621e8154917eabd1 (patch) | |
| tree | 6895b03495212b88d7cdb377e256ec1f42e7d27c /drivers/net | |
| parent | 3d206e6899a07fe853f703f7e68f84b48b919129 (diff) | |
iwlwifi: pcie: don't consider IV len in A-MSDU
From gen2 PN is totally offloaded to hardware (also the space for the
IV isn't part of the skb). As you can see in mvm/mac80211.c:3545, the
MAC for cipher types CCMP/GCMP doesn't set
IEEE80211_KEY_FLAG_PUT_IV_SPACE for gen2 NICs.
This causes all the AMSDU data to be corrupted with cipher enabled.
Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c index 8894027429d6..d80f71f82a6d 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c @@ -251,27 +251,23 @@ static int iwl_pcie_gen2_build_amsdu(struct iwl_trans *trans, struct ieee80211_hdr *hdr = (void *)skb->data; unsigned int snap_ip_tcp_hdrlen, ip_hdrlen, total_len, hdr_room; unsigned int mss = skb_shinfo(skb)->gso_size; - u16 length, iv_len, amsdu_pad; + u16 length, amsdu_pad; u8 *start_hdr; struct iwl_tso_hdr_page *hdr_page; struct page **page_ptr; struct tso_t tso; - /* if the packet is protected, then it must be CCMP or GCMP */ - iv_len = ieee80211_has_protected(hdr->frame_control) ? - IEEE80211_CCMP_HDR_LEN : 0; - trace_iwlwifi_dev_tx(trans->dev, skb, tfd, sizeof(*tfd), &dev_cmd->hdr, start_len, 0); ip_hdrlen = skb_transport_header(skb) - skb_network_header(skb); snap_ip_tcp_hdrlen = 8 + ip_hdrlen + tcp_hdrlen(skb); - total_len = skb->len - snap_ip_tcp_hdrlen - hdr_len - iv_len; + total_len = skb->len - snap_ip_tcp_hdrlen - hdr_len; amsdu_pad = 0; /* total amount of header we may need for this A-MSDU */ hdr_room = DIV_ROUND_UP(total_len, mss) * - (3 + snap_ip_tcp_hdrlen + sizeof(struct ethhdr)) + iv_len; + (3 + snap_ip_tcp_hdrlen + sizeof(struct ethhdr)); /* Our device supports 9 segments at most, it will fit in 1 page */ hdr_page = get_page_hdr(trans, hdr_room); @@ -282,14 +278,12 @@ static int iwl_pcie_gen2_build_amsdu(struct iwl_trans *trans, start_hdr = hdr_page->pos; page_ptr = (void *)((u8 *)skb->cb + trans_pcie->page_offs); *page_ptr = hdr_page->page; - memcpy(hdr_page->pos, skb->data + hdr_len, iv_len); - hdr_page->pos += iv_len; /* - * Pull the ieee80211 header + IV to be able to use TSO core, + * Pull the ieee80211 header to be able to use TSO core, * we will restore it for the tx_status flow. */ - skb_pull(skb, hdr_len + iv_len); + skb_pull(skb, hdr_len); /* * Remove the length of all the headers that we don't actually @@ -364,8 +358,8 @@ static int iwl_pcie_gen2_build_amsdu(struct iwl_trans *trans, } } - /* re -add the WiFi header and IV */ - skb_push(skb, hdr_len + iv_len); + /* re -add the WiFi header */ + skb_push(skb, hdr_len); return 0; |