From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4BA8231B11A; Mon, 18 Aug 2025 13:00:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755522016; cv=none; b=UUCT/D+FI3CncMUl7KOakc9fzo0B/F3GMU73rDcWJi0vALiH9T4L5sJxoprXESaoZBJvk8Pr7GPfoHTQvqC02vIidyPrUeVYcdp2HiGFjqk9wDoyoXMnPIzrJRjVmtuuC0On8yKDNSReqk5eL0UKu4G1zFd1/thKIPlOdqk83zk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755522016; c=relaxed/simple; bh=zhlAspqD7v/gmaEy21QKF4vina0D4R/CRfazTnXZ9hM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=oVDi9Zs+2RfkzTANVdgnFUg/XeGBZ/AGH66dmlGmf0CF22hnDcOd1buO3aQ1NHYaWgL9lbn5bHWaPAMnANsE+4pCiJ0J4fR2Lk0rYfJdaYrlEw/JxZB8siUfKnCqQDaGG8xjh3Qp+WjZjy76EkTAcR9A4zo1PLikA6rS7cRxYcE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=T+PefIO3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="T+PefIO3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFED3C4CEEB; Mon, 18 Aug 2025 13:00:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755522016; bh=zhlAspqD7v/gmaEy21QKF4vina0D4R/CRfazTnXZ9hM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T+PefIO3Begvh1eEyivfHvKtYJrD1xDkAFkzDrMX9usO8ntdTIqLWHVYgQTw6q3gb NqXeVeEF9psfgiXDDzEao2FoRLglwwMG3HZtxO3RS357DdjOyd6zn5NXHGn23/tiF1 FScuSfmqTe+9aMJ5RHWEiLvUtQSgpjj2Qw2fgVU4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jack Ping CHNG , Maxime Chevallier , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.12 182/444] net: pcs: xpcs: mask readl() return value to 16 bits Date: Mon, 18 Aug 2025 14:43:28 +0200 Message-ID: <20250818124455.696882745@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818124448.879659024@linuxfoundation.org> References: <20250818124448.879659024@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jack Ping CHNG [ Upstream commit 2b0ba7b5b010455c4e43ab557860f8b1089e7424 ] readl() returns 32-bit value but Clause 22/45 registers are 16-bit wide. Masking with 0xFFFF avoids using garbage upper bits. Signed-off-by: Jack Ping CHNG Reviewed-by: Maxime Chevallier Link: https://patch.msgid.link/20250716030349.3796806-1-jchng@maxlinear.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/pcs/pcs-xpcs-plat.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/pcs/pcs-xpcs-plat.c b/drivers/net/pcs/pcs-xpcs-plat.c index 629315f1e57c..9dcaf7a66113 100644 --- a/drivers/net/pcs/pcs-xpcs-plat.c +++ b/drivers/net/pcs/pcs-xpcs-plat.c @@ -66,7 +66,7 @@ static int xpcs_mmio_read_reg_indirect(struct dw_xpcs_plat *pxpcs, switch (pxpcs->reg_width) { case 4: writel(page, pxpcs->reg_base + (DW_VR_CSR_VIEWPORT << 2)); - ret = readl(pxpcs->reg_base + (ofs << 2)); + ret = readl(pxpcs->reg_base + (ofs << 2)) & 0xffff; break; default: writew(page, pxpcs->reg_base + (DW_VR_CSR_VIEWPORT << 1)); @@ -124,7 +124,7 @@ static int xpcs_mmio_read_reg_direct(struct dw_xpcs_plat *pxpcs, switch (pxpcs->reg_width) { case 4: - ret = readl(pxpcs->reg_base + (csr << 2)); + ret = readl(pxpcs->reg_base + (csr << 2)) & 0xffff; break; default: ret = readw(pxpcs->reg_base + (csr << 1)); -- 2.39.5