From: Johan Hovold <johan+linaro@kernel.org>
To: Jeff Johnson <jjohnson@kernel.org>
Cc: Miaoqing Pan <quic_miaoqing@quicinc.com>,
linux-wireless@vger.kernel.org, ath11k@lists.infradead.org,
linux-kernel@vger.kernel.org,
Johan Hovold <johan+linaro@kernel.org>
Subject: [PATCH 2/3] wifi: ath11k: use plain access for descriptor length
Date: Mon, 26 May 2025 13:48:02 +0200 [thread overview]
Message-ID: <20250526114803.2122-3-johan+linaro@kernel.org> (raw)
In-Reply-To: <20250526114803.2122-1-johan+linaro@kernel.org>
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@kernel.org>
---
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
next prev parent reply other threads:[~2025-05-26 11:48 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-26 11:48 [PATCH 0/3] wifi: ath11k: fix dest ring-buffer corruption Johan Hovold
2025-05-26 11:48 ` [PATCH 1/3] " Johan Hovold
2025-05-29 7:03 ` Miaoqing Pan
2025-06-02 8:03 ` Johan Hovold
2025-06-03 10:52 ` Baochen Qiang
2025-06-03 11:51 ` Johan Hovold
2025-06-04 2:16 ` Baochen Qiang
2025-06-04 6:59 ` Johan Hovold
2025-06-05 8:16 ` Baochen Qiang
2025-06-04 2:34 ` Miaoqing Pan
2025-06-04 5:32 ` Miaoqing Pan
2025-06-04 7:06 ` Johan Hovold
2025-06-04 7:57 ` Miaoqing Pan
2025-06-04 8:07 ` Johan Hovold
2025-06-04 8:18 ` Miaoqing Pan
2025-06-04 16:24 ` Jeff Johnson
2025-06-05 4:01 ` Miaoqing Pan
2025-06-05 10:17 ` Johan Hovold
2025-06-05 10:54 ` Baochen Qiang
2025-06-06 0:52 ` Miaoqing Pan
2025-06-06 2:02 ` Baochen Qiang
2025-06-06 7:43 ` Miaoqing Pan
2025-06-25 2:06 ` Baochen Qiang
2025-06-25 9:34 ` Johan Hovold
2025-05-26 11:48 ` Johan Hovold [this message]
2025-05-26 11:48 ` [PATCH 3/3] wifi: ath11k: use plain accesses for monitor descriptor Johan Hovold
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