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 X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C85FC433DF for ; Sun, 18 Oct 2020 19:21:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2DF0A222B9 for ; Sun, 18 Oct 2020 19:21:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603048887; bh=MkgMDcccSHwun46vYipogs2oopYDY7nk+d6mYmDSuyM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DzNEeNqa3G++MCstu4YJOKjuqmNsIxQtFdYSj/T0Q+iAuG6p9NVlNWDn9dMrY8MsE jE49hGmr3hFSU2jehYh2ZC+ED2eefPMciOolwJ7PovxpgQUo6AOhQxjFSvd14XBNHb 3DORUXdA3XWQb6cCbxDQU8fVSRXuP8LTpp6u0Bxc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729383AbgJRTVZ (ORCPT ); Sun, 18 Oct 2020 15:21:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:33334 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729343AbgJRTVU (ORCPT ); Sun, 18 Oct 2020 15:21:20 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EF7E1222B9; Sun, 18 Oct 2020 19:21:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603048879; bh=MkgMDcccSHwun46vYipogs2oopYDY7nk+d6mYmDSuyM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aOIe99PAsGNeYnrnLfoaTjljyQkWJBVTaAI/xt0UiQDZQZVhcxamme6QIQaA/zDj1 tuhdnDojAkVA+BQsKj2+X9mPknb7fFwsBPlVTR7gcIFUlvJJuNcpDB4DLMLXoOHFWQ EQcS/TVhL6BfHU1RYIxgvOe2ZX8d/+2QivW0Tnfs= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Sherry Sun , Joakim Zhang , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 5.8 043/101] mic: vop: copy data to kernel space then write to io memory Date: Sun, 18 Oct 2020 15:19:28 -0400 Message-Id: <20201018192026.4053674-43-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201018192026.4053674-1-sashal@kernel.org> References: <20201018192026.4053674-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sherry Sun [ Upstream commit 675f0ad4046946e80412896436164d172cd92238 ] Read and write io memory should address align on ARCH ARM. Change to use memcpy_toio to avoid kernel panic caused by the address un-align issue. Signed-off-by: Sherry Sun Signed-off-by: Joakim Zhang Link: https://lore.kernel.org/r/20200929091106.24624-5-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/misc/mic/vop/vop_vringh.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/misc/mic/vop/vop_vringh.c b/drivers/misc/mic/vop/vop_vringh.c index 30eac172f0170..d069947b09345 100644 --- a/drivers/misc/mic/vop/vop_vringh.c +++ b/drivers/misc/mic/vop/vop_vringh.c @@ -602,6 +602,7 @@ static int vop_virtio_copy_from_user(struct vop_vdev *vdev, void __user *ubuf, size_t partlen; bool dma = VOP_USE_DMA && vi->dma_ch; int err = 0; + size_t offset = 0; if (dma) { dma_alignment = 1 << vi->dma_ch->device->copy_align; @@ -655,13 +656,20 @@ static int vop_virtio_copy_from_user(struct vop_vdev *vdev, void __user *ubuf, * We are copying to IO below and should ideally use something * like copy_from_user_toio(..) if it existed. */ - if (copy_from_user((void __force *)dbuf, ubuf, len)) { - err = -EFAULT; - dev_err(vop_dev(vdev), "%s %d err %d\n", - __func__, __LINE__, err); - goto err; + while (len) { + partlen = min_t(size_t, len, VOP_INT_DMA_BUF_SIZE); + + if (copy_from_user(vvr->buf, ubuf + offset, partlen)) { + err = -EFAULT; + dev_err(vop_dev(vdev), "%s %d err %d\n", + __func__, __LINE__, err); + goto err; + } + memcpy_toio(dbuf + offset, vvr->buf, partlen); + offset += partlen; + vdev->out_bytes += partlen; + len -= partlen; } - vdev->out_bytes += len; err = 0; err: vpdev->hw_ops->unmap(vpdev, dbuf); -- 2.25.1