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wil6210: workaround for BACK establishment race 

When establishing BACK, WMI may be handled earlier then Rx, in this case
late Rx will be mis-handled.

Detect early Rx and pass it to the stack, bypass reordering

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev 2014-12-23 09:47:23 +02:00 committed by Kalle Valo
parent 8d3b2f033f
commit ff7c5c3bef
1 changed files with 18 additions and 7 deletions
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25
drivers/net/wireless/ath/wil6210/rx_reorder.c
View File

@ -127,13 +127,24 @@ void wil_rx_reorder(struct wil6210_priv *wil, struct sk_buff *skb)
* reported, and data Rx, few packets may be pass up before reorder
* buffer get allocated. Catch up by pretending SSN is what we
* see in the 1-st Rx packet
*
* Another scenario, Rx get delayed and we got packet from before
* BACK. Pass it to the stack and wait.
*/
if (r->first_time) {
r->first_time = false;
if (seq != r->head_seq_num) {
wil_err(wil, "Error: 1-st frame with wrong sequence"
" %d, should be %d. Fixing...\n", seq,
r->head_seq_num);
if (seq_less(seq, r->head_seq_num)) {
wil_err(wil,
"Error: frame with early sequence 0x%03x, should be 0x%03x. Waiting...\n",
seq, r->head_seq_num);
r->first_time = true;
wil_netif_rx_any(skb, ndev);
goto out;
}
wil_err(wil,
"Error: 1-st frame with wrong sequence 0x%03x, should be 0x%03x. Fixing...\n",
seq, r->head_seq_num);
r->head_seq_num = seq;
r->ssn = seq;
}
@ -279,6 +290,7 @@ static void wil_back_rx_handle(struct wil6210_priv *wil,
int ba_policy = req->ba_param_set & BIT(1);
u16 agg_timeout = req->ba_timeout;
u16 status = WLAN_STATUS_SUCCESS;
u16 ssn = req->ba_seq_ctrl >> 4;
unsigned long flags;
int rc;
@ -297,9 +309,9 @@ static void wil_back_rx_handle(struct wil6210_priv *wil,
}
wil_dbg_wmi(wil,
"ADDBA request for CID %d %pM TID %d size %d timeout %d AMSDU%s policy %d token %d\n",
"ADDBA request for CID %d %pM TID %d size %d timeout %d AMSDU%s policy %d token %d SSN 0x%03x\n",
cid, sta->addr, tid, req_agg_wsize, req->ba_timeout,
agg_amsdu ? "+" : "-", !!ba_policy, req->dialog_token);
agg_amsdu ? "+" : "-", !!ba_policy, req->dialog_token, ssn);
/* apply policies */
if (ba_policy) {
@ -318,8 +330,7 @@ static void wil_back_rx_handle(struct wil6210_priv *wil,
spin_lock_irqsave(&sta->tid_rx_lock, flags);
wil_tid_ampdu_rx_free(wil, sta->tid_rx[tid]);
sta->tid_rx[tid] = wil_tid_ampdu_rx_alloc(wil, agg_wsize,
req->ba_seq_ctrl >> 4);
sta->tid_rx[tid] = wil_tid_ampdu_rx_alloc(wil, agg_wsize, ssn);
spin_unlock_irqrestore(&sta->tid_rx_lock, flags);
}