From nobody Sun Nov 24 17:58:10 2024 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 02F0E1BE223; Mon, 4 Nov 2024 13:02:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730725330; cv=none; b=UWTIt1aFULemvNs/s8ef9XH6b6hOBQUlwzxSoTiNwMxYsI0ieh/e3RHvoO1W7q7Fu1MlOn0gbu0t9zVbrH1GeC54optcERZ/YfHVJ5KnE0ZF8WNY4Oatui2ecs4trfHPW7NCP7LOG9GKhyh7JlpeEO20+CQpLSaQkkwZRnIuse0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730725330; c=relaxed/simple; bh=81bXzyf/c0KElFkbrGf0peXgTbgrEywCB4w+SEhzFh0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZTPkOSGGVgBYEqNPxrkEfyW7UGPPalvHsBXO/Yu6rPB++qQ2STEDRYMaW+VYocb7rytSD6iTzL/1bVRdFyqdKlMz0pOjq9EynpyX71ecCBCh4VW3BQRx0vy2Dseu94K/I+nfJNnSnU+gRD+HsmUJ8ffWeFsD84cpsiT2NB/onx4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=dZlFXwJc; arc=none smtp.client-ip=117.135.210.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="dZlFXwJc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-ID:MIME-Version; bh=yReYF cMZ5fi0QK3NMeC05hlOMsUoL2XX7F1e3XLspqo=; b=dZlFXwJcnOk73IdtMSuNp 5TvNcfVz+HSkoAi8AvrEWnmQV/Wbo5MpbXt0eW2j1TkB3OBiDGrWY1JzNzfsHFY4 a/ykJ6Nn1DzR5SyidLqiApY8RSp2otqNdxbOdlNnCp09sJl6V9zUgbYsoWWUZyak 55RTUffMOTN18EoUKP5frM= Received: from ProDesk.. (unknown [58.22.7.114]) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wD3H6e8xShnPaEoFA--.33421S3; Mon, 04 Nov 2024 21:01:52 +0800 (CST) From: Andy Yan To: andrew+netdev@lunn.ch Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, david.wu@rock-chips.com, Johan Jonker , Andy Yan Subject: [PATCH v2 1/2] net: arc: fix the device for dma_map_single/dma_unmap_single Date: Mon, 4 Nov 2024 21:01:38 +0800 Message-ID: <20241104130147.440125-2-andyshrk@163.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241104130147.440125-1-andyshrk@163.com> References: <20241104130147.440125-1-andyshrk@163.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wD3H6e8xShnPaEoFA--.33421S3 X-Coremail-Antispam: 1Uf129KBjvJXoW3AF43Zw4kJF4rurykZr1xGrg_yoW7Cry3pF 1rGa4SyFW2qFnFkrWrJrWUXr1Yywn5J34S9ay7G392gFnxXrn3Wry0yFy2y3yFyFZ2kF4f Ar1DCFyfXFn7WrDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jAjjgUUUUU= X-CM-SenderInfo: 5dqg52xkunqiywtou0bp/1tbiqQGNXmcovEiZFgABsO Content-Type: text/plain; charset="utf-8" From: Johan Jonker The ndev->dev and pdev->dev aren't the same device, use ndev->dev.parent which has dma_mask, ndev->dev.parent is just pdev->dev. Or it would cause the following issue: [ 39.933526] ------------[ cut here ]------------ [ 39.938414] WARNING: CPU: 1 PID: 501 at kernel/dma/mapping.c:149 dma_map= _page_attrs+0x90/0x1f8 Fixes: f959dcd6ddfd ("dma-direct: Fix potential NULL pointer dereference") Signed-off-by: David Wu Signed-off-by: Johan Jonker Signed-off-by: Andy Yan --- Changes in v2: - Add fix tag. - Add cover letter. drivers/net/ethernet/arc/emac_main.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/ar= c/emac_main.c index 31ee477dd131e..8283aeee35fb6 100644 --- a/drivers/net/ethernet/arc/emac_main.c +++ b/drivers/net/ethernet/arc/emac_main.c @@ -111,6 +111,7 @@ static void arc_emac_tx_clean(struct net_device *ndev) { struct arc_emac_priv *priv =3D netdev_priv(ndev); struct net_device_stats *stats =3D &ndev->stats; + struct device *dev =3D ndev->dev.parent; unsigned int i; =20 for (i =3D 0; i < TX_BD_NUM; i++) { @@ -140,7 +141,7 @@ static void arc_emac_tx_clean(struct net_device *ndev) stats->tx_bytes +=3D skb->len; } =20 - dma_unmap_single(&ndev->dev, dma_unmap_addr(tx_buff, addr), + dma_unmap_single(dev, dma_unmap_addr(tx_buff, addr), dma_unmap_len(tx_buff, len), DMA_TO_DEVICE); =20 /* return the sk_buff to system */ @@ -174,6 +175,7 @@ static void arc_emac_tx_clean(struct net_device *ndev) static int arc_emac_rx(struct net_device *ndev, int budget) { struct arc_emac_priv *priv =3D netdev_priv(ndev); + struct device *dev =3D ndev->dev.parent; unsigned int work_done; =20 for (work_done =3D 0; work_done < budget; work_done++) { @@ -223,9 +225,9 @@ static int arc_emac_rx(struct net_device *ndev, int bud= get) continue; } =20 - addr =3D dma_map_single(&ndev->dev, (void *)skb->data, + addr =3D dma_map_single(dev, (void *)skb->data, EMAC_BUFFER_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(&ndev->dev, addr)) { + if (dma_mapping_error(dev, addr)) { if (net_ratelimit()) netdev_err(ndev, "cannot map dma buffer\n"); dev_kfree_skb(skb); @@ -237,7 +239,7 @@ static int arc_emac_rx(struct net_device *ndev, int bud= get) } =20 /* unmap previosly mapped skb */ - dma_unmap_single(&ndev->dev, dma_unmap_addr(rx_buff, addr), + dma_unmap_single(dev, dma_unmap_addr(rx_buff, addr), dma_unmap_len(rx_buff, len), DMA_FROM_DEVICE); =20 pktlen =3D info & LEN_MASK; @@ -423,6 +425,7 @@ static int arc_emac_open(struct net_device *ndev) { struct arc_emac_priv *priv =3D netdev_priv(ndev); struct phy_device *phy_dev =3D ndev->phydev; + struct device *dev =3D ndev->dev.parent; int i; =20 phy_dev->autoneg =3D AUTONEG_ENABLE; @@ -445,9 +448,9 @@ static int arc_emac_open(struct net_device *ndev) if (unlikely(!rx_buff->skb)) return -ENOMEM; =20 - addr =3D dma_map_single(&ndev->dev, (void *)rx_buff->skb->data, + addr =3D dma_map_single(dev, (void *)rx_buff->skb->data, EMAC_BUFFER_SIZE, DMA_FROM_DEVICE); - if (dma_mapping_error(&ndev->dev, addr)) { + if (dma_mapping_error(dev, addr)) { netdev_err(ndev, "cannot dma map\n"); dev_kfree_skb(rx_buff->skb); return -ENOMEM; @@ -548,6 +551,7 @@ static void arc_emac_set_rx_mode(struct net_device *nde= v) static void arc_free_tx_queue(struct net_device *ndev) { struct arc_emac_priv *priv =3D netdev_priv(ndev); + struct device *dev =3D ndev->dev.parent; unsigned int i; =20 for (i =3D 0; i < TX_BD_NUM; i++) { @@ -555,7 +559,7 @@ static void arc_free_tx_queue(struct net_device *ndev) struct buffer_state *tx_buff =3D &priv->tx_buff[i]; =20 if (tx_buff->skb) { - dma_unmap_single(&ndev->dev, + dma_unmap_single(dev, dma_unmap_addr(tx_buff, addr), dma_unmap_len(tx_buff, len), DMA_TO_DEVICE); @@ -579,6 +583,7 @@ static void arc_free_tx_queue(struct net_device *ndev) static void arc_free_rx_queue(struct net_device *ndev) { struct arc_emac_priv *priv =3D netdev_priv(ndev); + struct device *dev =3D ndev->dev.parent; unsigned int i; =20 for (i =3D 0; i < RX_BD_NUM; i++) { @@ -586,7 +591,7 @@ static void arc_free_rx_queue(struct net_device *ndev) struct buffer_state *rx_buff =3D &priv->rx_buff[i]; =20 if (rx_buff->skb) { - dma_unmap_single(&ndev->dev, + dma_unmap_single(dev, dma_unmap_addr(rx_buff, addr), dma_unmap_len(rx_buff, len), DMA_FROM_DEVICE); @@ -679,6 +684,7 @@ static netdev_tx_t arc_emac_tx(struct sk_buff *skb, str= uct net_device *ndev) unsigned int len, *txbd_curr =3D &priv->txbd_curr; struct net_device_stats *stats =3D &ndev->stats; __le32 *info =3D &priv->txbd[*txbd_curr].info; + struct device *dev =3D ndev->dev.parent; dma_addr_t addr; =20 if (skb_padto(skb, ETH_ZLEN)) @@ -692,10 +698,9 @@ static netdev_tx_t arc_emac_tx(struct sk_buff *skb, st= ruct net_device *ndev) return NETDEV_TX_BUSY; } =20 - addr =3D dma_map_single(&ndev->dev, (void *)skb->data, len, - DMA_TO_DEVICE); + addr =3D dma_map_single(dev, (void *)skb->data, len, DMA_TO_DEVICE); =20 - if (unlikely(dma_mapping_error(&ndev->dev, addr))) { + if (unlikely(dma_mapping_error(dev, addr))) { stats->tx_dropped++; stats->tx_errors++; dev_kfree_skb_any(skb); --=20 2.34.1