Credit calculation was overly complex
unnecessarily. Now skb dequeing is more unified.
Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
---
v2:
* use DIV_ROUND_UP
drivers/net/wireless/ath/ath10k/htc.c | 58 ++++++---------------------------
1 file changed, 10 insertions(+), 48 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/htc.c b/drivers/net/wireless/ath/ath10k/htc.c
index f03fd8d..1da0f82 100644
--- a/drivers/net/wireless/ath/ath10k/htc.c
+++ b/drivers/net/wireless/ath/ath10k/htc.c
@@ -167,49 +167,6 @@ err:
return ret;
}
-static struct sk_buff *ath10k_htc_get_skb_credit_based(struct ath10k_htc *htc,
- struct ath10k_htc_ep *ep,
- u8 *credits)
-{
- struct sk_buff *skb;
- struct ath10k_skb_cb *skb_cb;
- int credits_required;
- int remainder;
- unsigned int transfer_len;
-
- lockdep_assert_held(&htc->tx_lock);
-
- skb = __skb_dequeue(&ep->tx_queue);
- if (!skb)
- return NULL;
-
- skb_cb = ATH10K_SKB_CB(skb);
- transfer_len = skb->len;
-
- if (likely(transfer_len <= htc->target_credit_size)) {
- credits_required = 1;
- } else {
- /* figure out how many credits this message requires */
- credits_required = transfer_len / htc->target_credit_size;
- remainder = transfer_len % htc->target_credit_size;
-
- if (remainder)
- credits_required++;
- }
-
- ath10k_dbg(ATH10K_DBG_HTC, "Credits required %d got %d\n",
- credits_required, ep->tx_credits);
-
- if (ep->tx_credits < credits_required) {
- __skb_queue_head(&ep->tx_queue, skb);
- return NULL;
- }
-
- ep->tx_credits -= credits_required;
- *credits = credits_required;
- return skb;
-}
-
static void ath10k_htc_send_work(struct work_struct *work)
{
struct ath10k_htc_ep *ep = container_of(work,
@@ -224,11 +181,16 @@ static void ath10k_htc_send_work(struct work_struct *work)
ath10k_htc_send_complete_check(ep, 0);
spin_lock_bh(&htc->tx_lock);
- if (ep->tx_credit_flow_enabled)
- skb = ath10k_htc_get_skb_credit_based(htc, ep,
- &credits);
- else
- skb = __skb_dequeue(&ep->tx_queue);
+ skb = __skb_dequeue(&ep->tx_queue);
+
+ if (ep->tx_credit_flow_enabled) {
+ credits = DIV_ROUND_UP(skb->len,
+ htc->target_credit_size);
+ if (ep->tx_credits < credits) {
+ __skb_queue_head(&ep->tx_queue, skb);
+ skb = NULL;
+ }
+ }
spin_unlock_bh(&htc->tx_lock);
if (!skb)
--
1.7.9.5
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