From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.smtp-ext.broadcom.com (relay.smtp-ext.broadcom.com [192.19.166.228]) (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 E1DE94B2055; Mon, 12 Oct 2026 16:58:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.19.166.228 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791824294; cv=none; b=grUorCQRPUGPoxgOyiNnbwq3qiPC1zsDczn4XA/NCPvEaA1+FnzIYq7bEwxrpUwpAHb2RHtxsrY96E5kzlRiEou90YUIkLpWUvA/esqYyDjT62GAV4d7p9v4xY8MDrxHs3AiB+NzgpmDiB2chElU3xvl87ZVqLbTeyRYjtINz5o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791824294; c=relaxed/simple; bh=RbKEQ9Ao6sfM8uo8Xav6MW10A4+TnfLMYt6FY1stsN4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ECxxF9YIyUTIaZCsUtmRm7wh47oqtGB0qKrvy9LJ3M2qt0Gt0Or37B7Atzd0CtJb27wWU/2QalWQXFvKoo6A5LdWhdI5q2I31vbwUQ3atHMQuF1dsE5IKeu3vAdjQv80yTbnaGHDZfAIwS1axidS3wsdDoo+J6dl4aFU966RQdQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=ljTh4B2z; arc=none smtp.client-ip=192.19.166.228 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="ljTh4B2z" Received: from mail-acc-it-01.broadcom.com (mail-acc-it-01.acc.broadcom.net [10.35.36.83]) by relay.smtp-ext.broadcom.com (Postfix) with ESMTP id E28F4C0000E2; Mon, 12 Oct 2026 09:58:00 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com E28F4C0000E2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1791824281; bh=RbKEQ9Ao6sfM8uo8Xav6MW10A4+TnfLMYt6FY1stsN4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ljTh4B2z1rdjJRbLBSvxvosP7gSxtvi0gfOCulJMoFJSIvJCF5hrZCGfkaMyhih9p KycwRFcw3KzQ5/+Hr29LVUY3A2z5EF4qtIfof7YnLDpCBhVSpJVCqvZWqfXn7ZBPw2 j3u1DUZfobhjjGkiE3lK+igDm5+FsA175tyEtvv4= Received: from stbirv-lnx-1.igp.broadcom.net (stbirv-lnx-1.igp.broadcom.net [10.67.48.32]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail-acc-it-01.broadcom.com (Postfix) with ESMTPSA id 9A54EAEA2; Mon, 12 Oct 2026 12:57:59 -0400 (EDT) From: Florian Fainelli To: netdev@vger.kernel.org Cc: Florian Fainelli , Nicolai Buchwitz , Justin Chen , Doug Berger , Broadcom internal kernel review list , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Zak Kemble , Simon Horman , Ryo Takakura , linux-kernel@vger.kernel.org (open list) Subject: [PATCH net v3 2/6] net: bcmasp: unmap previous DMA mappings on TX map failure Date: Mon, 12 Oct 2026 09:56:50 -0700 Message-Id: <20261012165654.3480668-3-florian.fainelli@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261012165654.3480668-1-florian.fainelli@broadcom.com> References: <20261012165654.3480668-1-florian.fainelli@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When mapping an skb with fragments for transmission in bcmasp_xmit(), if mapping fails on fragment i > 0, the error handler calls bcmasp_clean_txcb() for previous iterations j < i. However, bcmasp_clean_txcb() only zeroes the control block fields without unmapping the DMA buffers, leaking the DMA mappings allocated for the head and earlier fragments. Call dma_unmap_single() before calling bcmasp_clean_txcb() in the error cleanup loop. Fixes: 490cb412007d ("net: bcmasp: Add support for ASP2.0 Ethernet controller") Assisted-by: LLM Reviewed-by: Nicolai Buchwitz Reviewed-by: Justin Chen Signed-off-by: Florian Fainelli --- drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c index f2176ef3a127..9ad5a982542f 100644 --- a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c +++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c @@ -285,6 +285,11 @@ static netdev_tx_t bcmasp_xmit(struct sk_buff *skb, struct net_device *dev) intf->mib.tx_dma_failed++; spb_index = intf->tx_spb_index; for (j = 0; j < i; j++) { + txcb = &intf->tx_cbs[spb_index]; + dma_unmap_single(kdev, + dma_unmap_addr(txcb, dma_addr), + dma_unmap_len(txcb, dma_len), + DMA_TO_DEVICE); bcmasp_clean_txcb(intf, spb_index); spb_index = incr_ring(spb_index, DESC_RING_COUNT); -- 2.34.1