From patchwork Tue Oct 27 13:54:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 312805 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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 44F9CC55178 for ; Tue, 27 Oct 2020 14:53:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EF0BA22264 for ; Tue, 27 Oct 2020 14:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603810426; bh=MkgMDcccSHwun46vYipogs2oopYDY7nk+d6mYmDSuyM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=B5oR1G9859tfgzo1C7/hdAQN/8/EYMLP5adfjzGUPZttcnwYGNMakXfDeALZvtajq 95XlwDOSoYK9+tEk6bXoyAQhL7DAXpbr1Q0jVzAa5rgeHpJIOfygNF2C2zsKIWxf1a FELzYUDWZNVnZxBMzRtrLwh196j/hKWtF/xN3mrA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1780074AbgJ0Oxn (ORCPT ); Tue, 27 Oct 2020 10:53:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:46126 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764078AbgJ0OqN (ORCPT ); Tue, 27 Oct 2020 10:46:13 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 45C122225E; Tue, 27 Oct 2020 14:46:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603809972; bh=MkgMDcccSHwun46vYipogs2oopYDY7nk+d6mYmDSuyM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d2UfpCJkCNnsau9rB/L/bjyrrwjqYVFR0TdCrrfX5YssiBwBJw9XXUp9CKcTpKBO+ lbnUX6Dr9B/RFhs72b8knchakJEQetkLYdY9WF5bQz1GnVL/uMr5JNnIvP+aaPLXc6 ZOa+nQJVWbop0G5Io+g+W99QtsJDk/rGVtpWJVEw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sherry Sun , Joakim Zhang , Sasha Levin Subject: [PATCH 5.4 354/408] mic: vop: copy data to kernel space then write to io memory Date: Tue, 27 Oct 2020 14:54:52 +0100 Message-Id: <20201027135511.440525496@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135455.027547757@linuxfoundation.org> References: <20201027135455.027547757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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);