From nobody Fri Oct 10 03:59:39 2025 Received: from codeconstruct.com.au (pi.codeconstruct.com.au [203.29.241.158]) (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 BF54B2DF3D5 for ; Mon, 16 Jun 2025 13:14:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.29.241.158 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750079651; cv=none; b=XSISag4eX4MjFc32CoRKkguMu5X2xjb0X+f8FU9qCIcvOE6uUlgfPmLNGTeQDj9qwFqC4IpTVAe0499dv0iSruqRm0iLr5SuqdOduqY8Z9g0hQrCKmnzQjhUyL3b76DplOq3dV0GI39t7wnpzVquXwPganBAZ4O8ulK9PNP+Q80= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750079651; c=relaxed/simple; bh=5ur0noPldhPSJzrpIbGvJfTAVrDS0OY/wJuG/WreF/g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=kLg8R3YGNwuWbhkbiZgbc+q3G3plgMKpqBjtvJLhcwbo4csZ8Kwk8zHpaPZnSvVQoDhfhykD5QdIRrv11VlMgMBWQcP1RCWoffIEKlgEIK9Ts1CGmGPSjdOamkueRZNLD+eg0IorEwyTTUn3PriihsgEjZyt47HCsw66EFUhZic= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeconstruct.com.au; spf=pass smtp.mailfrom=codeconstruct.com.au; dkim=pass (2048-bit key) header.d=codeconstruct.com.au header.i=@codeconstruct.com.au header.b=jOyYZgdx; arc=none smtp.client-ip=203.29.241.158 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=codeconstruct.com.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=codeconstruct.com.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=codeconstruct.com.au header.i=@codeconstruct.com.au header.b="jOyYZgdx" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=codeconstruct.com.au; s=2022a; t=1750079640; bh=ZH2nQiJURmm3f1AacPrlu4/bRjlg+XhQ1J7Bn7VXnB0=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=jOyYZgdxYYAWdVDWWT9hujOZNAzM7/cW8rNsAD7F/VQKHLlPYJNsa9RD7V0Mbu3CD ZC3xxtBeDLKvUk3wfHwhcQr1yNbTCCJEEMVQSNJmxWpUEHRFjg9WINb24ZCOU3tUDx lpiB0l8eGro6Lp/dqaeZwN71irafgr7CH9dBLiaiXT83vQNOr5HJIe4XQA49+S0xgp KU2guJrnLcxMmJENIbv23CfG/lwB6Apj2Dzx5VS0K2o6baF37jr6AgkgJ+/hrW79Bh pn0QzyL/NBVQp9m3AtYxPL4Uj++L8qBSWDBo9zAhlVg04udw67xJS8ziEQu1Vcjm11 +u4D9a6bUJasQ== Received: from [127.0.1.1] (unknown [180.150.112.166]) by mail.codeconstruct.com.au (Postfix) with ESMTPSA id 329C36884F; Mon, 16 Jun 2025 21:14:00 +0800 (AWST) From: Andrew Jeffery Date: Mon, 16 Jun 2025 22:43:41 +0930 Subject: [PATCH v2 04/10] soc: aspeed: lpc-snoop: Constrain parameters in channel paths Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250616-aspeed-lpc-snoop-fixes-v2-4-3cdd59c934d3@codeconstruct.com.au> References: <20250616-aspeed-lpc-snoop-fixes-v2-0-3cdd59c934d3@codeconstruct.com.au> In-Reply-To: <20250616-aspeed-lpc-snoop-fixes-v2-0-3cdd59c934d3@codeconstruct.com.au> To: linux-aspeed@lists.ozlabs.org Cc: Joel Stanley , Henry Martin , Jean Delvare , Patrick Rudolph , Andrew Geissler , Ninad Palsule , Patrick Venture , Robert Lippert , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Andrew Jeffery X-Mailer: b4 0.14.2 Ensure pointers and the channel index are valid before use. Signed-off-by: Andrew Jeffery --- drivers/soc/aspeed/aspeed-lpc-snoop.c | 25 ++++++++++++++++--------- 1 file changed, 16 insertions(+), 9 deletions(-) diff --git a/drivers/soc/aspeed/aspeed-lpc-snoop.c b/drivers/soc/aspeed/asp= eed-lpc-snoop.c index ca7536213e0986f737606a52996ffea620df2a7a..804c6ed9c4c671da73a6c66c1de= 41c59922c82dc 100644 --- a/drivers/soc/aspeed/aspeed-lpc-snoop.c +++ b/drivers/soc/aspeed/aspeed-lpc-snoop.c @@ -25,7 +25,6 @@ =20 #define DEVICE_NAME "aspeed-lpc-snoop" =20 -#define NUM_SNOOP_CHANNELS 2 #define SNOOP_FIFO_SIZE 2048 =20 #define HICR5 0x80 @@ -57,6 +56,12 @@ struct aspeed_lpc_snoop_model_data { unsigned int has_hicrb_ensnp; }; =20 +enum aspeed_lpc_snoop_index { + ASPEED_LPC_SNOOP_INDEX_0 =3D 0, + ASPEED_LPC_SNOOP_INDEX_1 =3D 1, + ASPEED_LPC_SNOOP_INDEX_MAX =3D ASPEED_LPC_SNOOP_INDEX_1, +}; + struct aspeed_lpc_snoop_channel { bool enabled; struct kfifo fifo; @@ -68,7 +73,7 @@ struct aspeed_lpc_snoop { struct regmap *regmap; int irq; struct clk *clk; - struct aspeed_lpc_snoop_channel chan[NUM_SNOOP_CHANNELS]; + struct aspeed_lpc_snoop_channel chan[ASPEED_LPC_SNOOP_INDEX_MAX + 1]; }; =20 static struct aspeed_lpc_snoop_channel *snoop_file_to_chan(struct file *fi= le) @@ -182,9 +187,10 @@ static int aspeed_lpc_snoop_config_irq(struct aspeed_l= pc_snoop *lpc_snoop, return 0; } =20 +__attribute__((nonnull)) static int aspeed_lpc_enable_snoop(struct aspeed_lpc_snoop *lpc_snoop, struct device *dev, - int channel, u16 lpc_port) + enum aspeed_lpc_snoop_index channel, u16 lpc_port) { const struct aspeed_lpc_snoop_model_data *model_data; u32 hicr5_en, snpwadr_mask, snpwadr_shift, hicrb_en; @@ -251,8 +257,9 @@ static int aspeed_lpc_enable_snoop(struct aspeed_lpc_sn= oop *lpc_snoop, return rc; } =20 +__attribute__((nonnull)) static void aspeed_lpc_disable_snoop(struct aspeed_lpc_snoop *lpc_snoop, - int channel) + enum aspeed_lpc_snoop_index channel) { if (!lpc_snoop->chan[channel].enabled) return; @@ -331,16 +338,16 @@ static int aspeed_lpc_snoop_probe(struct platform_dev= ice *pdev) if (rc) goto err; =20 - rc =3D aspeed_lpc_enable_snoop(lpc_snoop, dev, 0, port); + rc =3D aspeed_lpc_enable_snoop(lpc_snoop, dev, ASPEED_LPC_SNOOP_INDEX_0, = port); if (rc) goto err; =20 /* Configuration of 2nd snoop channel port is optional */ if (of_property_read_u32_index(dev->of_node, "snoop-ports", 1, &port) =3D=3D 0) { - rc =3D aspeed_lpc_enable_snoop(lpc_snoop, dev, 1, port); + rc =3D aspeed_lpc_enable_snoop(lpc_snoop, dev, ASPEED_LPC_SNOOP_INDEX_1,= port); if (rc) { - aspeed_lpc_disable_snoop(lpc_snoop, 0); + aspeed_lpc_disable_snoop(lpc_snoop, ASPEED_LPC_SNOOP_INDEX_0); goto err; } } @@ -358,8 +365,8 @@ static void aspeed_lpc_snoop_remove(struct platform_dev= ice *pdev) struct aspeed_lpc_snoop *lpc_snoop =3D dev_get_drvdata(&pdev->dev); =20 /* Disable both snoop channels */ - aspeed_lpc_disable_snoop(lpc_snoop, 0); - aspeed_lpc_disable_snoop(lpc_snoop, 1); + aspeed_lpc_disable_snoop(lpc_snoop, ASPEED_LPC_SNOOP_INDEX_0); + aspeed_lpc_disable_snoop(lpc_snoop, ASPEED_LPC_SNOOP_INDEX_1); =20 clk_disable_unprepare(lpc_snoop->clk); } --=20 2.39.5