[PATCH 52/65] staging: wfx: replace wfx_tx_get_tid() with ieee80211_get_tid()

Jérôme Pouiller
2020-01-15T12:13:50Z

wfx_tx_get_tid() was used as a wrapper around ieee80211_get_tid(). It
did sometime return WFX_MAX_TID to ask to upper layers to not include
the frame in "buffered" counter. The objective of this behavior is not
clear, but tests has shown that wfx_tx_get_tid() can be replaced by
ieee80211_get_tid() without any regressions.

BTW, it is not necessary to save the tid in tx_rpiv since it can be
retrieved from the 802.11 header.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
drivers/staging/wfx/data_tx.c | 23 ++++++-----------------
drivers/staging/wfx/data_tx.h | 1 -
drivers/staging/wfx/sta.c | 2 +-
drivers/staging/wfx/sta.h | 5 +----
4 files changed, 8 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
index 8c9f986ec672..7da1afd6e9b5 100644
--- a/drivers/staging/wfx/data_tx.c
+++ b/drivers/staging/wfx/data_tx.c
@@ -283,6 +283,7 @@ static void wfx_tx_manage_pm(struct wfx_vif *wvif, struct ieee80211_hdr *hdr,
{
u32 mask = ~BIT(tx_priv->raw_link_id);
struct wfx_sta_priv *sta_priv;
+ int tid = ieee80211_get_tid(hdr);

spin_lock_bh(&wvif->ps_state_lock);
if (ieee80211_is_auth(hdr->frame_control)) {
@@ -298,11 +299,11 @@ static void wfx_tx_manage_pm(struct wfx_vif *wvif, struct ieee80211_hdr *hdr,
}
spin_unlock_bh(&wvif->ps_state_lock);

- if (sta && tx_priv->tid < WFX_MAX_TID) {
+ if (sta) {
sta_priv = (struct wfx_sta_priv *)&sta->drv_priv;
spin_lock_bh(&sta_priv->lock);
- sta_priv->buffered[tx_priv->tid]++;
- ieee80211_sta_set_buffered(sta, tx_priv->tid, true);
+ sta_priv->buffered[tid]++;
+ ieee80211_sta_set_buffered(sta, tid, true);
spin_unlock_bh(&sta_priv->lock);
}
}
@@ -418,17 +419,6 @@ static struct hif_ht_tx_parameters wfx_tx_get_tx_parms(struct wfx_dev *wdev, str
return ret;
}

-static u8 wfx_tx_get_tid(struct ieee80211_hdr *hdr)
-{
- // FIXME: ieee80211_get_tid(hdr) should be sufficient for all cases.
- if (!ieee80211_is_data(hdr->frame_control))
- return WFX_MAX_TID;
- if (ieee80211_is_data_qos(hdr->frame_control))
- return ieee80211_get_tid(hdr);
- else
- return 0;
-}
-
static int wfx_tx_get_icv_len(struct ieee80211_key_conf *hw_key)
{
int mic_space;
@@ -460,7 +450,6 @@ static int wfx_tx_inner(struct wfx_vif *wvif, struct ieee80211_sta *sta,
memset(tx_info->rate_driver_data, 0, sizeof(struct wfx_tx_priv));
// Fill tx_priv
tx_priv = (struct wfx_tx_priv *)tx_info->rate_driver_data;
- tx_priv->tid = wfx_tx_get_tid(hdr);
tx_priv->raw_link_id = wfx_tx_get_raw_link_id(wvif, sta, hdr);
tx_priv->link_id = tx_priv->raw_link_id;
if (ieee80211_has_protected(hdr->frame_control))
@@ -634,11 +623,11 @@ static void wfx_notify_buffered_tx(struct wfx_vif *wvif, struct sk_buff *skb)
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_sta *sta;
struct wfx_sta_priv *sta_priv;
- int tid = wfx_tx_get_tid(hdr);
+ int tid = ieee80211_get_tid(hdr);

rcu_read_lock(); // protect sta
sta = ieee80211_find_sta(wvif->vif, hdr->addr1);
- if (sta && tid < WFX_MAX_TID) {
+ if (sta) {
sta_priv = (struct wfx_sta_priv *)&sta->drv_priv;
spin_lock_bh(&sta_priv->lock);
WARN(!sta_priv->buffered[tid], "inconsistent notification");
diff --git a/drivers/staging/wfx/data_tx.h b/drivers/staging/wfx/data_tx.h
index 83720b343484..04b2147101b6 100644
--- a/drivers/staging/wfx/data_tx.h
+++ b/drivers/staging/wfx/data_tx.h
@@ -38,7 +38,6 @@ struct wfx_tx_priv {
struct ieee80211_key_conf *hw_key;
u8 link_id;
u8 raw_link_id;
- u8 tid;
} __packed;

void wfx_tx_policy_init(struct wfx_vif *wvif);
diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index eebbd3292b1b..61d64beb6143 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -604,7 +604,7 @@ int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *) &sta->drv_priv;
int i;

- for (i = 0; i < WFX_MAX_TID; i++)
+ for (i = 0; i < ARRAY_SIZE(sta_priv->buffered); i++)
WARN(sta_priv->buffered[i], "release station while Tx is in progress");
// FIXME: see note in wfx_sta_add()
if (vif->type == NL80211_IFTYPE_STATION)
diff --git a/drivers/staging/wfx/sta.h b/drivers/staging/wfx/sta.h
index 47d94d6b8590..e832405d604e 100644
--- a/drivers/staging/wfx/sta.h
+++ b/drivers/staging/wfx/sta.h
@@ -12,9 +12,6 @@

#include "hif_api_cmd.h"

-// FIXME: use IEEE80211_NUM_TIDS
-#define WFX_MAX_TID 8
-
struct wfx_dev;
struct wfx_vif;

@@ -40,7 +37,7 @@ struct wfx_grp_addr_table {
struct wfx_sta_priv {
int link_id;
int vif_id;
- u8 buffered[WFX_MAX_TID];
+ u8 buffered[IEEE80211_NUM_TIDS];
// Ensure atomicity of "buffered" and calls to ieee80211_sta_set_buffered()
spinlock_t lock;
};
--
2.25.0