[PATCH v2 09/12] ath11k: remove mod operator in dst ring processing

[P Praneesh]

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 at codeaurora.org>
Signed-off-by: Sriram R <srirrama at codeaurora.org>
Signed-off-by: Jouni Malinen <jouni at codeaurora.org>
Signed-off-by: P Praneesh <ppranees at codeaurora.org>
---
 drivers/net/wireless/ath/ath11k/hal.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c
index f04edaf..7cf9e23 100644
--- 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)
-- 
2.7.4