From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0156AC7115B for ; Tue, 17 Jun 2025 08:48:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+kDZb+mdn7JCLPJ5u3ArqeKD27urtwDNmqER59tjCYA=; b=X33bw3hkiqXs3QyseSI3HLMT+l 3jqgjTNgLva+7AzyPeeS1TWCaOcXQPO1iKSyFSvxMYktisqvyMfXfrLpTBrou2Fjea+jJJWmlm7eo +BA7A1WtFtyS0xKW8G+Dx+Ip1ljUWgVmEEuc+LfLwOb65Vw79EhiJlF8G4pLWL4v8hcJNyXN37inS 8RVO6KcDZkeA91hip76sEez2jAgDFKqdiGkkZBpUOGkdBH1nXGlbYtHl7kfAWgOkmLOApuCjRxxOG T2GGO0msSkgm6RzXxxm813Z6a/WSlNz/u2ZY4k4JRvPpi6z90IUDqM+FxUb6/BSlNavKQHnsmKeCd Mv4nXwlg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uRRzt-00000006e8K-33Jf; Tue, 17 Jun 2025 08:48:49 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uRRw4-00000006dLB-0Xoq for ath12k@lists.infradead.org; Tue, 17 Jun 2025 08:44:53 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 7EA02A4AD3D; Tue, 17 Jun 2025 08:44:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 29ACEC4CEE3; Tue, 17 Jun 2025 08:44:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1750149890; bh=8TdcpNaOAnT6sQbogFZJL8X+FGsz3jK1CDvlMPWZFoE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tA08Rkge3dARox3RhosuJBCQhyuXL73DtBFR3JKG1io9kPU4kmY9e+fK+fdx8DeLJ ihcyrRGQ1+pDICNQlSmd+KhRLUrJkdUmC/D7YPJ8FbtGTnHPq3RKcKMgV9rvmwxjRv JFIrjMbkNFmjJk9pm6atz42lj+kK2da4V2fJQMGPf1O6u2LhQ8vBVdLT2WFyd0nvcG h/ZEKNFlYqaZxzJQr6wJiE57x6s63die96wD/04R6nGkik921gExhH8XHxl7mdrQK6 CIbkTaeDi3YBdzZCBb/y90r0KW+X63eDjPXO93Ee5keCOasoeQsfFBcM/vrr/80bHn e77S5uLxAG24A== Received: from johan by xi.lan with local (Exim 4.97.1) (envelope-from ) id 1uRRw0-000000003mp-0YYK; Tue, 17 Jun 2025 10:44:48 +0200 From: Johan Hovold To: Jeff Johnson Cc: Miaoqing Pan , Remi Pommarel , Baochen Qiang , linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH v3 2/4] wifi: ath12k: use plain access for descriptor length Date: Tue, 17 Jun 2025 10:44:00 +0200 Message-ID: <20250617084402.14475-3-johan+linaro@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250617084402.14475-1-johan+linaro@kernel.org> References: <20250617084402.14475-1-johan+linaro@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250617_014452_322839_B5663E5E X-CRM114-Status: UNSURE ( 9.21 ) X-CRM114-Notice: Please train this message. X-BeenThere: ath12k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath12k" Errors-To: ath12k-bounces+ath12k=archiver.kernel.org@lists.infradead.org The read memory barrier added by commit 6b67d2cf14ea ("wifi: ath12k: 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(). Tested-on: WCN7850 hw2.0 WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3 Signed-off-by: Johan Hovold --- drivers/net/wireless/ath/ath12k/hal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath12k/hal.c b/drivers/net/wireless/ath/ath12k/hal.c index f8bd3837b9dc..726969cfcaec 100644 --- a/drivers/net/wireless/ath/ath12k/hal.c +++ b/drivers/net/wireless/ath/ath12k/hal.c @@ -1950,7 +1950,7 @@ u32 ath12k_hal_ce_dst_status_get_length(struct hal_ce_srng_dst_status_desc *desc { u32 len; - len = le32_get_bits(READ_ONCE(desc->flags), HAL_CE_DST_STATUS_DESC_FLAGS_LEN); + len = le32_get_bits(desc->flags, HAL_CE_DST_STATUS_DESC_FLAGS_LEN); desc->flags &= ~cpu_to_le32(HAL_CE_DST_STATUS_DESC_FLAGS_LEN); return len; -- 2.49.0