From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 44FDECCA47B for ; Tue, 14 Jun 2022 02:10:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=w4idwG+tKDvX1dNtDkormtxAxVY/zKvOi/yW5o4b5jg=; b=Hmyagrg6YUU1UW R8PZyBMX5Bj5DAQfj4yE1V6XbNk/GKrmeK1G2U8f7ZcF0gXIq6FLE330qcFesdPCg+Dw+lhUlis5I CxXZ0/1MqZxXdWCUvLTekIC++2YUE6LYZ3wUVOtQZjdEOvAFIuED8P3ptcxPWTU/e7QK4bQEu2LgU w5xa9g0QLevoqFUtaicaTmkPw4NdRwYRBLn9io94pKoguDi6CxqWgOHGzf/3xYcCjh+E/dNgN/BAn Fah4GbtvunMJ4Le19x4UbyN+mBEH2rYFr4FdzbCbz94KQXZbjJgZH6phdJ70RoZBhoPG3QeLOIjMX VGfGAlLzkmT7SVzcNLzg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0w0o-006fsh-TA; Tue, 14 Jun 2022 02:10:34 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o0w0X-006fjB-Pm; Tue, 14 Jun 2022 02:10:19 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5977B60F1C; Tue, 14 Jun 2022 02:10:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0AB2BC36B00; Tue, 14 Jun 2022 02:10:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1655172617; bh=y5LEe/I2hjA22v9AnBMJ09sBI7qaJ0yppZgeWvB0g/8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o87WBV2+JCaSHhjUdpECagfL+qjwUXaXqrhD64FEmmXMkqyBgTE6ldR0fTc6pYSJh 1TN7WIcfmUeH9BeGcfhm8Pp0Ifvlfo9a/a09TuG2q8F4MFMiWY6grRc1EuasxOqgY4 a95HKd/ysFfzMwaku+23hV0KpETwlpgLBn3l5F3EgFJzH1mY4J79hf7bSWHdWoOGGY zbKBkO4VeeKqZl9b7cRKrL3Fx9LDSHTku343uhIGJN/PyXAXNCbytf7n4x5HoPzCEp 1wRNELoFaaDTY0YzSu8C6CqcohC2Ym4gYhWZgSlcwPyPjNBcmKwvgyMHhs4zePbwC5 dVtoBtobS/+7A== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chen Lin , Jakub Kicinski , Sasha Levin , nbd@openwrt.org, blogic@openwrt.org, matthias.bgg@gmail.com, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org Subject: [PATCH AUTOSEL 4.19 17/18] net: ethernet: mtk_eth_soc: fix misuse of mem alloc interface netdev[napi]_alloc_frag Date: Mon, 13 Jun 2022 22:09:40 -0400 Message-Id: <20220614020941.1100702-17-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220614020941.1100702-1-sashal@kernel.org> References: <20220614020941.1100702-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220613_191017_949516_399927B0 X-CRM114-Status: GOOD ( 15.61 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Chen Lin [ Upstream commit 2f2c0d2919a14002760f89f4e02960c735a316d2 ] When rx_flag == MTK_RX_FLAGS_HWLRO, rx_data_len = MTK_MAX_LRO_RX_LENGTH(4096 * 3) > PAGE_SIZE. netdev_alloc_frag is for alloction of page fragment only. Reference to other drivers and Documentation/vm/page_frags.rst Branch to use __get_free_pages when ring->frag_size > PAGE_SIZE. Signed-off-by: Chen Lin Link: https://lore.kernel.org/r/1654692413-2598-1-git-send-email-chen45464546@163.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index 59f3dce3ab1d..d0f2488003eb 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -597,6 +597,17 @@ static inline void mtk_rx_get_desc(struct mtk_rx_dma *rxd, rxd->rxd4 = READ_ONCE(dma_rxd->rxd4); } +static void *mtk_max_lro_buf_alloc(gfp_t gfp_mask) +{ + unsigned int size = mtk_max_frag_size(MTK_MAX_LRO_RX_LENGTH); + unsigned long data; + + data = __get_free_pages(gfp_mask | __GFP_COMP | __GFP_NOWARN, + get_order(size)); + + return (void *)data; +} + /* the qdma core needs scratch memory to be setup */ static int mtk_init_fq_dma(struct mtk_eth *eth) { @@ -1005,7 +1016,10 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget, goto release_desc; /* alloc new buffer */ - new_data = napi_alloc_frag(ring->frag_size); + if (ring->frag_size <= PAGE_SIZE) + new_data = napi_alloc_frag(ring->frag_size); + else + new_data = mtk_max_lro_buf_alloc(GFP_ATOMIC); if (unlikely(!new_data)) { netdev->stats.rx_dropped++; goto release_desc; @@ -1312,7 +1326,10 @@ static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag) return -ENOMEM; for (i = 0; i < rx_dma_size; i++) { - ring->data[i] = netdev_alloc_frag(ring->frag_size); + if (ring->frag_size <= PAGE_SIZE) + ring->data[i] = netdev_alloc_frag(ring->frag_size); + else + ring->data[i] = mtk_max_lro_buf_alloc(GFP_KERNEL); if (!ring->data[i]) return -ENOMEM; } -- 2.35.1 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek