diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/pcie/tx.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/pcie/tx.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index e44e5adc2b95..911cf9868107 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -2096,6 +2096,7 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb, struct iwl_cmd_meta *out_meta, struct iwl_device_cmd *dev_cmd, u16 tb1_len) { + struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; struct iwl_trans_pcie *trans_pcie = txq->trans_pcie; struct ieee80211_hdr *hdr = (void *)skb->data; unsigned int snap_ip_tcp_hdrlen, ip_hdrlen, total_len, hdr_room; @@ -2145,6 +2146,13 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb, */ skb_pull(skb, hdr_len + iv_len); + /* + * Remove the length of all the headers that we don't actually + * have in the MPDU by themselves, but that we duplicate into + * all the different MSDUs inside the A-MSDU. + */ + le16_add_cpu(&tx_cmd->len, -snap_ip_tcp_hdrlen); + tso_start(skb, &tso); while (total_len) { @@ -2155,7 +2163,7 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb, unsigned int hdr_tb_len; dma_addr_t hdr_tb_phys; struct tcphdr *tcph; - u8 *iph; + u8 *iph, *subf_hdrs_start = hdr_page->pos; total_len -= data_left; @@ -2216,6 +2224,8 @@ static int iwl_fill_data_tbs_amsdu(struct iwl_trans *trans, struct sk_buff *skb, hdr_tb_len, false); trace_iwlwifi_dev_tx_tso_chunk(trans->dev, start_hdr, hdr_tb_len); + /* add this subframe's headers' length to the tx_cmd */ + le16_add_cpu(&tx_cmd->len, hdr_page->pos - subf_hdrs_start); /* prepare the start_hdr for the next subframe */ start_hdr = hdr_page->pos; @@ -2408,9 +2418,10 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, tb1_len = len; } - /* The first TB points to bi-directional DMA data */ - memcpy(&txq->first_tb_bufs[txq->write_ptr], &dev_cmd->hdr, - IWL_FIRST_TB_SIZE); + /* + * The first TB points to bi-directional DMA data, we'll + * memcpy the data into it later. + */ iwl_pcie_txq_build_tfd(trans, txq, tb0_phys, IWL_FIRST_TB_SIZE, true); @@ -2434,6 +2445,10 @@ int iwl_trans_pcie_tx(struct iwl_trans *trans, struct sk_buff *skb, goto out_err; } + /* building the A-MSDU might have changed this data, so memcpy it now */ + memcpy(&txq->first_tb_bufs[txq->write_ptr], &dev_cmd->hdr, + IWL_FIRST_TB_SIZE); + tfd = iwl_pcie_get_tfd(trans_pcie, txq, txq->write_ptr); /* Set up entry for this TFD in Tx byte-count array */ iwl_pcie_txq_update_byte_cnt_tbl(trans, txq, le16_to_cpu(tx_cmd->len), |