Commit a1775e73 authored Nov 12, 2021 by P Praneesh Committed by Kalle Valo Nov 15, 2021

ath11k: avoid additional access to ath11k_hal_srng_dst_num_free



In ath11k_dp_process_rx(), after processing rx_desc from
ath11k_hal_srng_dst_get_next_entry(), ath11k_hal_srng_dst_num_free()
is accessed everytime because of done flag is not set.

To avoid this additional access to ath11k_hal_srng_dst_num_free(),
increment total_msdu_reaped only when continuation is not set and
update done flag correspondingly.

Tested-on: QCN9074 hw1.0 PCI WLAN.HK.2.4.0.1.r2-00012-QCAHKSWPL_SILICONZ-1
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01695-QCAHKSWPL_SILICONZ-1

Co-developed-by: Sriram R <srirrama@codeaurora.org>
Signed-off-by: Sriram R <srirrama@codeaurora.org>
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Signed-off-by: P Praneesh <ppranees@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1630560820-21905-5-git-send-email-ppranees@codeaurora.org

parent 5e76fe03

drivers/net/wireless/ath/ath11k/dp_rx.c

+7 −3

Original line number	Diff line number	Diff line
		@@ -2701,7 +2701,6 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id,
		DMA_FROM_DEVICE);

		num_buffs_reaped[mac_id]++;
		total_msdu_reaped++;

		push_reason = FIELD_GET(HAL_REO_DEST_RING_INFO0_PUSH_REASON,
		desc.info0);
		@@ -2728,10 +2727,15 @@ int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id,
		rxcb->mac_id = mac_id;
		__skb_queue_tail(&msdu_list, msdu);

		if (total_msdu_reaped >= quota && !rxcb->is_continuation) {
		if (rxcb->is_continuation) {
		done = false;
		} else {
		total_msdu_reaped++;
		done = true;
		break;
		}

		if (total_msdu_reaped >= budget)
		break;
		}

		/* Hw might have updated the head pointer after we cached it.