From: Johannes Berg <johannes.berg@xxxxxxxxx>
Instead of building the rx_status on the stack and then
copying it to the skb, allocate the skb a bit earlier
and then build the rx_status in place.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Reviewed-by: IdoX Yariv <ido@xxxxxxxxxx>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/mvm/rx.c | 99 +++++++++++++++++------------------
1 file changed, 49 insertions(+), 50 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/mvm/rx.c b/drivers/net/wireless/iwlwifi/mvm/rx.c
index 93d5b69..57052e6 100644
--- a/drivers/net/wireless/iwlwifi/mvm/rx.c
+++ b/drivers/net/wireless/iwlwifi/mvm/rx.c
@@ -96,22 +96,13 @@ int iwl_mvm_rx_rx_phy_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
* Adds the rxb to a new skb and give it to mac80211
*/
static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
+ struct sk_buff *skb,
struct ieee80211_hdr *hdr, u16 len,
u32 ampdu_status,
- struct iwl_rx_cmd_buffer *rxb,
- struct ieee80211_rx_status *stats)
+ struct iwl_rx_cmd_buffer *rxb)
{
- struct sk_buff *skb;
unsigned int hdrlen, fraglen;
- /* Dont use dev_alloc_skb(), we'll have enough headroom once
- * ieee80211_hdr pulled.
- */
- skb = alloc_skb(128, GFP_ATOMIC);
- if (!skb) {
- IWL_ERR(mvm, "alloc_skb failed\n");
- return;
- }
/* If frame is small enough to fit in skb->head, pull it completely.
* If not, only pull ieee80211_hdr so that splice() or TCP coalesce
* are more efficient.
@@ -129,8 +120,6 @@ static void iwl_mvm_pass_packet_to_mac80211(struct iwl_mvm *mvm,
fraglen, rxb->truesize);
}
- memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
-
ieee80211_rx(mvm->hw, skb);
}
@@ -242,11 +231,12 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
struct iwl_device_cmd *cmd)
{
struct ieee80211_hdr *hdr;
- struct ieee80211_rx_status rx_status = {};
+ struct ieee80211_rx_status *rx_status;
struct iwl_rx_packet *pkt = rxb_addr(rxb);
struct iwl_rx_phy_info *phy_info;
struct iwl_rx_mpdu_res_start *rx_res;
struct ieee80211_sta *sta;
+ struct sk_buff *skb;
u32 len;
u32 ampdu_status;
u32 rate_n_flags;
@@ -259,20 +249,31 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
rx_pkt_status = le32_to_cpup((__le32 *)
(pkt->data + sizeof(*rx_res) + len));
- memset(&rx_status, 0, sizeof(rx_status));
+ /* Dont use dev_alloc_skb(), we'll have enough headroom once
+ * ieee80211_hdr pulled.
+ */
+ skb = alloc_skb(128, GFP_ATOMIC);
+ if (!skb) {
+ IWL_ERR(mvm, "alloc_skb failed\n");
+ return 0;
+ }
+
+ rx_status = IEEE80211_SKB_RXCB(skb);
/*
* drop the packet if it has failed being decrypted by HW
*/
- if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, &rx_status, rx_pkt_status)) {
+ if (iwl_mvm_set_mac80211_rx_flag(mvm, hdr, rx_status, rx_pkt_status)) {
IWL_DEBUG_DROP(mvm, "Bad decryption results 0x%08x\n",
rx_pkt_status);
+ kfree_skb(skb);
return 0;
}
if ((unlikely(phy_info->cfg_phy_cnt > 20))) {
IWL_DEBUG_DROP(mvm, "dsp size out of range [0,20]: %d\n",
phy_info->cfg_phy_cnt);
+ kfree_skb(skb);
return 0;
}
@@ -283,31 +284,31 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
if (!(rx_pkt_status & RX_MPDU_RES_STATUS_CRC_OK) ||
!(rx_pkt_status & RX_MPDU_RES_STATUS_OVERRUN_OK)) {
IWL_DEBUG_RX(mvm, "Bad CRC or FIFO: 0x%08X.\n", rx_pkt_status);
- rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
+ rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
}
/* This will be used in several places later */
rate_n_flags = le32_to_cpu(phy_info->rate_n_flags);
/* rx_status carries information about the packet to mac80211 */
- rx_status.mactime = le64_to_cpu(phy_info->timestamp);
- rx_status.device_timestamp = le32_to_cpu(phy_info->system_timestamp);
- rx_status.band =
+ rx_status->mactime = le64_to_cpu(phy_info->timestamp);
+ rx_status->device_timestamp = le32_to_cpu(phy_info->system_timestamp);
+ rx_status->band =
(phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_BAND_24)) ?
IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
- rx_status.freq =
+ rx_status->freq =
ieee80211_channel_to_frequency(le16_to_cpu(phy_info->channel),
- rx_status.band);
+ rx_status->band);
/*
* TSF as indicated by the fw is at INA time, but mac80211 expects the
* TSF at the beginning of the MPDU.
*/
- /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
+ /*rx_status->flag |= RX_FLAG_MACTIME_MPDU;*/
- iwl_mvm_get_signal_strength(mvm, phy_info, &rx_status);
+ iwl_mvm_get_signal_strength(mvm, phy_info, rx_status);
- IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status.signal,
- (unsigned long long)rx_status.mactime);
+ IWL_DEBUG_STATS_LIMIT(mvm, "Rssi %d, TSF %llu\n", rx_status->signal,
+ (unsigned long long)rx_status->mactime);
rcu_read_lock();
/*
@@ -326,15 +327,14 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
if (sta) {
struct iwl_mvm_sta *mvmsta;
mvmsta = iwl_mvm_sta_from_mac80211(sta);
- rs_update_last_rssi(mvm, &mvmsta->lq_sta,
- &rx_status);
+ rs_update_last_rssi(mvm, &mvmsta->lq_sta, rx_status);
}
rcu_read_unlock();
/* set the preamble flag if appropriate */
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_SHORT_PREAMBLE))
- rx_status.flag |= RX_FLAG_SHORTPRE;
+ rx_status->flag |= RX_FLAG_SHORTPRE;
if (phy_info->phy_flags & cpu_to_le16(RX_RES_PHY_FLAGS_AGG)) {
/*
@@ -342,8 +342,8 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
* together since we get a single PHY response
* from the firmware for all of them
*/
- rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
- rx_status.ampdu_reference = mvm->ampdu_ref;
+ rx_status->flag |= RX_FLAG_AMPDU_DETAILS;
+ rx_status->ampdu_reference = mvm->ampdu_ref;
}
/* Set up the HT phy flags */
@@ -351,50 +351,49 @@ int iwl_mvm_rx_rx_mpdu(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
case RATE_MCS_CHAN_WIDTH_20:
break;
case RATE_MCS_CHAN_WIDTH_40:
- rx_status.flag |= RX_FLAG_40MHZ;
+ rx_status->flag |= RX_FLAG_40MHZ;
break;
case RATE_MCS_CHAN_WIDTH_80:
- rx_status.vht_flag |= RX_VHT_FLAG_80MHZ;
+ rx_status->vht_flag |= RX_VHT_FLAG_80MHZ;
break;
case RATE_MCS_CHAN_WIDTH_160:
- rx_status.vht_flag |= RX_VHT_FLAG_160MHZ;
+ rx_status->vht_flag |= RX_VHT_FLAG_160MHZ;
break;
}
if (rate_n_flags & RATE_MCS_SGI_MSK)
- rx_status.flag |= RX_FLAG_SHORT_GI;
+ rx_status->flag |= RX_FLAG_SHORT_GI;
if (rate_n_flags & RATE_HT_MCS_GF_MSK)
- rx_status.flag |= RX_FLAG_HT_GF;
+ rx_status->flag |= RX_FLAG_HT_GF;
if (rate_n_flags & RATE_MCS_LDPC_MSK)
- rx_status.flag |= RX_FLAG_LDPC;
+ rx_status->flag |= RX_FLAG_LDPC;
if (rate_n_flags & RATE_MCS_HT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_HT_STBC_MSK) >>
RATE_MCS_STBC_POS;
- rx_status.flag |= RX_FLAG_HT;
- rx_status.rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
- rx_status.flag |= stbc << RX_FLAG_STBC_SHIFT;
+ rx_status->flag |= RX_FLAG_HT;
+ rx_status->rate_idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
+ rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
} else if (rate_n_flags & RATE_MCS_VHT_MSK) {
u8 stbc = (rate_n_flags & RATE_MCS_VHT_STBC_MSK) >>
RATE_MCS_STBC_POS;
- rx_status.vht_nss =
+ rx_status->vht_nss =
((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
RATE_VHT_MCS_NSS_POS) + 1;
- rx_status.rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
- rx_status.flag |= RX_FLAG_VHT;
- rx_status.flag |= stbc << RX_FLAG_STBC_SHIFT;
+ rx_status->rate_idx = rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK;
+ rx_status->flag |= RX_FLAG_VHT;
+ rx_status->flag |= stbc << RX_FLAG_STBC_SHIFT;
if (rate_n_flags & RATE_MCS_BF_MSK)
- rx_status.vht_flag |= RX_VHT_FLAG_BF;
+ rx_status->vht_flag |= RX_VHT_FLAG_BF;
} else {
- rx_status.rate_idx =
+ rx_status->rate_idx =
iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
- rx_status.band);
+ rx_status->band);
}
#ifdef CONFIG_IWLWIFI_DEBUGFS
iwl_mvm_update_frame_stats(mvm, &mvm->drv_rx_stats, rate_n_flags,
- rx_status.flag & RX_FLAG_AMPDU_DETAILS);
+ rx_status->flag & RX_FLAG_AMPDU_DETAILS);
#endif
- iwl_mvm_pass_packet_to_mac80211(mvm, hdr, len, ampdu_status,
- rxb, &rx_status);
+ iwl_mvm_pass_packet_to_mac80211(mvm, skb, hdr, len, ampdu_status, rxb);
return 0;
}
--
1.9.1
--
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