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Revert "ath10k: fix napi_poll budget overflow"

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Thorsten reported on <fa6e3ee2-91b5-a54b-afe3-87f30aac7a48@leemhuis.info> that
commit c9353bf483 made ath10k unstable with QCA6174 on his Dell XPS13 (9360)
with an error message:

ath10k_pci 0000:3a:00.0: failed to extract amsdu: -11

It only seemed to happen with certain APs, not all, but when it happened the
only way to get ath10k working was to switch the wifi off and on with a hotkey.

As this commit made things even worse (a warning vs breaking the whole
connection) let's revert the commit for now and while the issue is being fixed.

Link: http://lists.infradead.org/pipermail/ath10k/2017-October/010227.html
Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo 2017-10-29 09:45:07 +02:00
parent 7eccb738fc
commit e48e9c429a
1 changed files with 6 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/net/wireless/ath/ath10k/htt_rx.c
View File

@ -1818,8 +1818,7 @@ static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
}
static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
struct sk_buff_head *amsdu,
int budget_left)
struct sk_buff_head *amsdu)
{
struct sk_buff *msdu;
struct htt_rx_desc *rxd;
@ -1830,9 +1829,8 @@ static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
if (WARN_ON(!skb_queue_empty(amsdu)))
return -EINVAL;
while ((msdu = __skb_dequeue(list)) && budget_left) {
while ((msdu = __skb_dequeue(list))) {
__skb_queue_tail(amsdu, msdu);
budget_left--;
rxd = (void *)msdu->data - sizeof(*rxd);
if (rxd->msdu_end.common.info0 &
@ -1923,8 +1921,7 @@ static int ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
return num_msdu;
}
static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb,
int budget_left)
static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
{
struct ath10k_htt *htt = &ar->htt;
struct htt_resp *resp = (void *)skb->data;
@ -1981,9 +1978,9 @@ static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb,
if (offload)
num_msdus = ath10k_htt_rx_h_rx_offload(ar, &list);
while (!skb_queue_empty(&list) && budget_left) {
while (!skb_queue_empty(&list)) {
__skb_queue_head_init(&amsdu);
ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu, budget_left);
ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
switch (ret) {
case 0:
/* Note: The in-order indication may report interleaved
@ -1993,7 +1990,6 @@ static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb,
* should still give an idea about rx rate to the user.
*/
num_msdus += skb_queue_len(&amsdu);
budget_left -= skb_queue_len(&amsdu);
ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
ath10k_htt_rx_h_filter(ar, &amsdu, status);
ath10k_htt_rx_h_mpdu(ar, &amsdu, status, false);
@ -2636,8 +2632,7 @@ int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget)
}
spin_lock_bh(&htt->rx_ring.lock);
num_rx_msdus = ath10k_htt_rx_in_ord_ind(ar, skb,
(budget - quota));
num_rx_msdus = ath10k_htt_rx_in_ord_ind(ar, skb);
spin_unlock_bh(&htt->rx_ring.lock);
if (num_rx_msdus < 0) {
resched_napi = true;