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iwlwifi: mvm: properly enable IP header checksumming

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The code was intended to enable IP header checksumming on AMSDUs, but
failed to really do so because the A-MSDU bit was set after all the
checksumming bits, and thus checking for A-MSDU could never be true.

Fix this by setting the A-MSDU bit before the offload bits.

Fixes: 5e6a98dc4863 ("iwlwifi: mvm: enable TCP/UDP checksum support for 9000 family")
Reported-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2017-06-19 13:24:49 +02:00 committed by Luca Coelho
parent c42ff65da8
commit 275896ab5f
1 changed files with 12 additions and 8 deletions
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20
drivers/net/wireless/intel/iwlwifi/mvm/tx.c
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@ -105,9 +105,9 @@ iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr,
static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb,
struct ieee80211_hdr *hdr,
struct ieee80211_tx_info *info)
struct ieee80211_tx_info *info,
u16 offload_assist)
{
u16 offload_assist = 0;
#if IS_ENABLED(CONFIG_INET)
u16 mh_len = ieee80211_hdrlen(hdr->frame_control);
u8 protocol = 0;
@ -207,6 +207,7 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
__le16 fc = hdr->frame_control;
u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
u32 len = skb->len + FCS_LEN;
u16 offload_assist = 0;
u8 ac;
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
@ -225,8 +226,7 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
tx_cmd->tid_tspec = qc[0] & 0xf;
tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
tx_cmd->offload_assist |=
cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
} else if (ieee80211_is_back_req(fc)) {
struct ieee80211_bar *bar = (void *)skb->data;
u16 control = le16_to_cpu(bar->control);
@ -291,11 +291,12 @@ void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
/* padding is inserted later in transport */
if (ieee80211_hdrlen(fc) % 4 &&
!(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
!(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))
offload_assist |= BIT(TX_CMD_OFFLD_PAD);
tx_cmd->offload_assist |=
cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info));
cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info,
offload_assist));
}
static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm,
@ -481,7 +482,7 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
if (iwl_mvm_has_new_tx_api(mvm)) {
struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload;
u16 offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info);
u16 offload_assist = 0;
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *qc = ieee80211_get_qos_ctl(hdr);
@ -490,6 +491,9 @@ iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
offload_assist |= BIT(TX_CMD_OFFLD_AMSDU);
}
offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info,
offload_assist);
/* padding is inserted later in transport */
if (ieee80211_hdrlen(hdr->frame_control) % 4 &&
!(offload_assist & BIT(TX_CMD_OFFLD_AMSDU)))