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 A204417BEA5; Thu, 15 Aug 2024 13:53:24 +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=1723730004; cv=none; b=gmx+QONl32dEWMBGcpNMVP0jZoizFS1NsKhM69cDliFkK7dKhqFs5Ftlp1faZEWBJUDQe6eER0+qnM4/51ZevOdRXsrMdhe7yl30UhrCtVbeZFXVkE+OF1caB/gRzlQ6oElmUvZT13rNfRsaN3L1ID7hjiBU12u0Bb2DsOJXli4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723730004; c=relaxed/simple; bh=XL0+tSD6FvqPk4RWhehTwwUa0CUnbm797NVleGAl87I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i7Swk0NFNNA9Cbu0T/xU7wwjhlwpeKhb0RFUTSbGLoPSfiNHk/whs5HUUd5+wcDo22EfcImoH4RW/Odbt9YowQ06u1wR3erTTOEWysS/Sss4BXdE9vi/Lz7nyCju/lFlZRK9irRyx3OAxA3rzxCDQs7QBxskEUBL6ZBtTcsOtZA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rACcIWqS; 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="rACcIWqS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1FD1EC4AF0C; Thu, 15 Aug 2024 13:53:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1723730004; bh=XL0+tSD6FvqPk4RWhehTwwUa0CUnbm797NVleGAl87I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rACcIWqSN1LOgL5ChEJZMgxrnc6Ya2gJnSbiU7obDIlneC/dZiVTJVznG8RpZSOWe w0xjyJkoUcxCPMnYZxBubYfZx7NvqaC5bQjxcY6k4ALO1mTyYRfT85AjDPI08yGExG SdrU+0/bmZnTYuFtRKDFrWESxab1PSO12/Xyzs0o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Simon Horman , Maxime Chevallier , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 275/484] net: stmmac: Correct byte order of perfect_match Date: Thu, 15 Aug 2024 15:22:13 +0200 Message-ID: <20240815131952.028172943@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240815131941.255804951@linuxfoundation.org> References: <20240815131941.255804951@linuxfoundation.org> User-Agent: quilt/0.67 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Simon Horman [ Upstream commit e9dbebae2e3c338122716914fe105458f41e3a4a ] The perfect_match parameter of the update_vlan_hash operation is __le16, and is correctly converted from host byte-order in the lone caller, stmmac_vlan_update(). However, the implementations of this caller, dwxgmac2_update_vlan_hash() and dwxgmac2_update_vlan_hash(), both treat this parameter as host byte order, using the following pattern: u32 value = ... ... writel(value | perfect_match, ...); This is not correct because both: 1) value is host byte order; and 2) writel expects a host byte order value as it's first argument I believe that this will break on big endian systems. And I expect it has gone unnoticed by only being exercised on little endian systems. The approach taken by this patch is to update the callback, and it's caller to simply use a host byte order value. Flagged by Sparse. Compile tested only. Fixes: c7ab0b8088d7 ("net: stmmac: Fallback to VLAN Perfect filtering if HASH is not available") Signed-off-by: Simon Horman Reviewed-by: Maxime Chevallier Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 2 +- drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 2 +- drivers/net/ethernet/stmicro/stmmac/hwif.h | 2 +- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++-- 4 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c index 026e3645e566a..e5c5a9c5389c3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c @@ -972,7 +972,7 @@ static void dwmac4_set_mac_loopback(void __iomem *ioaddr, bool enable) } static void dwmac4_update_vlan_hash(struct mac_device_info *hw, u32 hash, - __le16 perfect_match, bool is_double) + u16 perfect_match, bool is_double) { void __iomem *ioaddr = hw->pcsr; u32 value; diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c index dd73f38ec08d8..813327d04c56f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -582,7 +582,7 @@ static int dwxgmac2_rss_configure(struct mac_device_info *hw, } static void dwxgmac2_update_vlan_hash(struct mac_device_info *hw, u32 hash, - __le16 perfect_match, bool is_double) + u16 perfect_match, bool is_double) { void __iomem *ioaddr = hw->pcsr; diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h index 58e5c6c428dc0..414b63d5b9ebe 100644 --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h @@ -370,7 +370,7 @@ struct stmmac_ops { struct stmmac_rss *cfg, u32 num_rxq); /* VLAN */ void (*update_vlan_hash)(struct mac_device_info *hw, u32 hash, - __le16 perfect_match, bool is_double); + u16 perfect_match, bool is_double); void (*enable_vlan)(struct mac_device_info *hw, u32 type); int (*add_hw_vlan_rx_fltr)(struct net_device *dev, struct mac_device_info *hw, diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index b0ab8f6986f8b..a5cbb495b5581 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -6237,7 +6237,7 @@ static u32 stmmac_vid_crc32_le(__le16 vid_le) static int stmmac_vlan_update(struct stmmac_priv *priv, bool is_double) { u32 crc, hash = 0; - __le16 pmatch = 0; + u16 pmatch = 0; int count = 0; u16 vid = 0; @@ -6252,7 +6252,7 @@ static int stmmac_vlan_update(struct stmmac_priv *priv, bool is_double) if (count > 2) /* VID = 0 always passes filter */ return -EOPNOTSUPP; - pmatch = cpu_to_le16(vid); + pmatch = vid; hash = 0; } -- 2.43.0