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Subject[PATCH 09/20] staging: r8188eu: simplify frame type check
Date
Reorder the code in rtw_make_wlanhdr to make the function simpler.
There's a large if statement to check that we process only data frames.
Revert the condition and exit for non-data frames.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
drivers/staging/r8188eu/core/rtw_xmit.c | 139 ++++++++++++------------
1 file changed, 70 insertions(+), 69 deletions(-)

diff --git a/drivers/staging/r8188eu/core/rtw_xmit.c b/drivers/staging/r8188eu/core/rtw_xmit.c
index 2bccb9ca42e9..502f9a6f4250 100644
--- a/drivers/staging/r8188eu/core/rtw_xmit.c
+++ b/drivers/staging/r8188eu/core/rtw_xmit.c
@@ -809,90 +809,91 @@ s32 rtw_make_wlanhdr(struct adapter *padapter, u8 *hdr, struct pkt_attrib *pattr

SetFrameSubType(fctrl, pattrib->subtype);

- if (pattrib->subtype & IEEE80211_FTYPE_DATA) {
- if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
- /* to_ds = 1, fr_ds = 0; */
- /* Data transfer to AP */
- SetToDs(fctrl);
- memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv), ETH_ALEN);
- memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
- memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
-
- if (pqospriv->qos_option)
- qos_option = true;
- } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
- /* to_ds = 0, fr_ds = 1; */
- SetFrDs(fctrl);
- memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
- memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv), ETH_ALEN);
- memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);
-
- if (psta->qos_option)
- qos_option = true;
- } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
- check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
- memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
- memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
- memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv), ETH_ALEN);
-
- if (psta->qos_option)
- qos_option = true;
- } else {
- res = _FAIL;
- goto exit;
- }
+ if (!(pattrib->subtype & IEEE80211_FTYPE_DATA))
+ return _SUCCESS;
+
+ if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
+ /* to_ds = 1, fr_ds = 0; */
+ /* Data transfer to AP */
+ SetToDs(fctrl);
+ memcpy(pwlanhdr->addr1, get_bssid(pmlmepriv), ETH_ALEN);
+ memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
+ memcpy(pwlanhdr->addr3, pattrib->dst, ETH_ALEN);
+
+ if (pqospriv->qos_option)
+ qos_option = true;
+ } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
+ /* to_ds = 0, fr_ds = 1; */
+ SetFrDs(fctrl);
+ memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
+ memcpy(pwlanhdr->addr2, get_bssid(pmlmepriv), ETH_ALEN);
+ memcpy(pwlanhdr->addr3, pattrib->src, ETH_ALEN);

- if (pattrib->mdata)
- SetMData(fctrl);
+ if (psta->qos_option)
+ qos_option = true;
+ } else if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
+ check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
+ memcpy(pwlanhdr->addr1, pattrib->dst, ETH_ALEN);
+ memcpy(pwlanhdr->addr2, pattrib->src, ETH_ALEN);
+ memcpy(pwlanhdr->addr3, get_bssid(pmlmepriv), ETH_ALEN);

- if (pattrib->encrypt)
- SetPrivacy(fctrl);
+ if (psta->qos_option)
+ qos_option = true;
+ } else {
+ res = _FAIL;
+ goto exit;
+ }

- if (qos_option) {
- qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);
+ if (pattrib->mdata)
+ SetMData(fctrl);

- if (pattrib->priority)
- SetPriority(qc, pattrib->priority);
+ if (pattrib->encrypt)
+ SetPrivacy(fctrl);

- SetEOSP(qc, pattrib->eosp);
+ if (qos_option) {
+ qc = (unsigned short *)(hdr + pattrib->hdrlen - 2);

- SetAckpolicy(qc, pattrib->ack_policy);
- }
+ if (pattrib->priority)
+ SetPriority(qc, pattrib->priority);

- /* TODO: fill HT Control Field */
+ SetEOSP(qc, pattrib->eosp);

- /* Update Seq Num will be handled by f/w */
- if (psta) {
- psta->sta_xmitpriv.txseq_tid[pattrib->priority]++;
- psta->sta_xmitpriv.txseq_tid[pattrib->priority] &= 0xFFF;
+ SetAckpolicy(qc, pattrib->ack_policy);
+ }

- pattrib->seqnum = psta->sta_xmitpriv.txseq_tid[pattrib->priority];
+ /* TODO: fill HT Control Field */

- SetSeqNum(hdr, pattrib->seqnum);
+ /* Update Seq Num will be handled by f/w */
+ if (psta) {
+ psta->sta_xmitpriv.txseq_tid[pattrib->priority]++;
+ psta->sta_xmitpriv.txseq_tid[pattrib->priority] &= 0xFFF;

- /* check if enable ampdu */
- if (pattrib->ht_en && psta->htpriv.ampdu_enable) {
- if (psta->htpriv.agg_enable_bitmap & BIT(pattrib->priority))
- pattrib->ampdu_en = true;
- }
+ pattrib->seqnum = psta->sta_xmitpriv.txseq_tid[pattrib->priority];

- /* re-check if enable ampdu by BA_starting_seqctrl */
- if (pattrib->ampdu_en) {
- u16 tx_seq;
+ SetSeqNum(hdr, pattrib->seqnum);

- tx_seq = psta->BA_starting_seqctrl[pattrib->priority & 0x0f];
+ /* check if enable ampdu */
+ if (pattrib->ht_en && psta->htpriv.ampdu_enable) {
+ if (psta->htpriv.agg_enable_bitmap & BIT(pattrib->priority))
+ pattrib->ampdu_en = true;
+ }

- /* check BA_starting_seqctrl */
- if (SN_LESS(pattrib->seqnum, tx_seq)) {
- pattrib->ampdu_en = false;/* AGG BK */
- } else if (SN_EQUAL(pattrib->seqnum, tx_seq)) {
- psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (tx_seq + 1) & 0xfff;
+ /* re-check if enable ampdu by BA_starting_seqctrl */
+ if (pattrib->ampdu_en) {
+ u16 tx_seq;

- pattrib->ampdu_en = true;/* AGG EN */
- } else {
- psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (pattrib->seqnum + 1) & 0xfff;
- pattrib->ampdu_en = true;/* AGG EN */
- }
+ tx_seq = psta->BA_starting_seqctrl[pattrib->priority & 0x0f];
+
+ /* check BA_starting_seqctrl */
+ if (SN_LESS(pattrib->seqnum, tx_seq)) {
+ pattrib->ampdu_en = false;/* AGG BK */
+ } else if (SN_EQUAL(pattrib->seqnum, tx_seq)) {
+ psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (tx_seq + 1) & 0xfff;
+
+ pattrib->ampdu_en = true;/* AGG EN */
+ } else {
+ psta->BA_starting_seqctrl[pattrib->priority & 0x0f] = (pattrib->seqnum + 1) & 0xfff;
+ pattrib->ampdu_en = true;/* AGG EN */
}
}
}
--
2.30.2
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