ath11k: remove mod operator in dst ring processing

Replace use of mod operator with a manual wrap around
to avoid additional cost of using mod operation.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.4.0.1-01734-QCAHKSWPL_SILICONZ-1 v2

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/1630560820-21905-10-git-send-email-ppranees@codeaurora.org

diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c
index f04edaf..7cf9e23 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/hal.c
+++ b/drivers/net/wireless/ath/ath11k/hal.c
@@ -654,8 +654,11 @@ u32 *ath11k_hal_srng_dst_get_next_entry(struct ath11k_base *ab,
 
        desc = srng->ring_base_vaddr + srng->u.dst_ring.tp;
 
-       srng->u.dst_ring.tp = (srng->u.dst_ring.tp + srng->entry_size) %
-                             srng->ring_size;
+       srng->u.dst_ring.tp += srng->entry_size;
+
+       /* wrap around to start of ring*/
+       if (srng->u.dst_ring.tp == srng->ring_size)
+               srng->u.dst_ring.tp = 0;
 
        /* Try to prefetch the next descriptor in the ring */
        if (srng->flags & HAL_SRNG_FLAGS_CACHED)