[PATCH 2/3] wifi: ath11k: use plain access for descriptor length

From: Johan Hovold
Date: Mon May 26 2025 - 07:49:17 EST


The read memory barrier added by commit 6d037a372f81 ("wifi: ath11k: fix
ring-buffer corruption") is enough to guarantee ordering also for plain
descriptor accesses if the length helper is ever inlined so drop the
unnecessary READ_ONCE().

Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
---
drivers/net/wireless/ath/ath11k/hal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath11k/hal.c b/drivers/net/wireless/ath/ath11k/hal.c
index 8cb1505a5a0c..1ea7c494f387 100644
--- a/drivers/net/wireless/ath/ath11k/hal.c
+++ b/drivers/net/wireless/ath/ath11k/hal.c
@@ -599,7 +599,7 @@ u32 ath11k_hal_ce_dst_status_get_length(void *buf)
struct hal_ce_srng_dst_status_desc *desc = buf;
u32 len;

- len = FIELD_GET(HAL_CE_DST_STATUS_DESC_FLAGS_LEN, READ_ONCE(desc->flags));
+ len = FIELD_GET(HAL_CE_DST_STATUS_DESC_FLAGS_LEN, desc->flags);
desc->flags &= ~HAL_CE_DST_STATUS_DESC_FLAGS_LEN;

return len;
--
2.49.0