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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 C033DC433DF for ; Mon, 29 Jun 2020 21:54:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E3A0206A5 for ; Mon, 29 Jun 2020 21:54:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593467674; bh=sTZhejpHNdPTk4/qHgVwZSgCKGun0MCFQds5tLxB0K4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=z0i0j0LotNVbG3a24rWab2zB3JISK6hVHIEODAZND9TBFyNrWggvZIAv6/w20eSNT TQL2+S6lhLwVEySnEtUgwfmlMaHdbEEc+03Umyz5BfZiQpQSGGV2u/RZuzIXNULYNy Osr08PQy2mlSZfkx4S/3NwagaH8Eov70mds5cmkc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389289AbgF2Vy0 (ORCPT ); Mon, 29 Jun 2020 17:54:26 -0400 Received: from mail.kernel.org ([198.145.29.99]:56764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726586AbgF2Sfd (ORCPT ); Mon, 29 Jun 2020 14:35:33 -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 0AEB324732; Mon, 29 Jun 2020 15:20:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1593444052; bh=sTZhejpHNdPTk4/qHgVwZSgCKGun0MCFQds5tLxB0K4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ubc8ycbNfVqA4+LQMTlAvJF7GFl7QZSTX5xx3Ln/F28G8QAl2ZEws7P0UxxDCw39v s4sKSAJkrsxSTssd9M5oqBCMF4kwcKuigKK2W8V4ep8HJ2A4PcK+VlhhKi9hCh88OJ qD9eMt/a7QrrzPcTTfuvwx1qpqatOZ5jZ9TOyh3k= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Yoshihiro Shimoda , Hien Dang , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH 5.7 160/265] usb: renesas_usbhs: getting residue from callback_result Date: Mon, 29 Jun 2020 11:16:33 -0400 Message-Id: <20200629151818.2493727-161-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200629151818.2493727-1-sashal@kernel.org> References: <20200629151818.2493727-1-sashal@kernel.org> MIME-Version: 1.0 X-KernelTest-Patch: http://kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.7.7-rc1.gz X-KernelTest-Tree: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git X-KernelTest-Branch: linux-5.7.y X-KernelTest-Patches: git://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git X-KernelTest-Version: 5.7.7-rc1 X-KernelTest-Deadline: 2020-07-01T15:14+00:00 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yoshihiro Shimoda [ Upstream commit ea0efd687b01355cd799c8643d0c636ba4859ffc ] This driver assumed that dmaengine_tx_status() could return the residue even if the transfer was completed. However, this was not correct usage [1] and this caused to break getting the residue after the commit 24461d9792c2 ("dmaengine: virt-dma: Fix access after free in vchan_complete()") actually. So, this is possible to get wrong received size if the usb controller gets a short packet. For example, g_zero driver causes "bad OUT byte" errors. The usb-dmac driver will support the callback_result, so this driver can use it to get residue correctly. Note that even if the usb-dmac driver has not supported the callback_result yet, this patch doesn't cause any side-effects. [1] https://lore.kernel.org/dmaengine/20200616165550.GP2324254@vkoul-mobl/ Reported-by: Hien Dang Fixes: 24461d9792c2 ("dmaengine: virt-dma: Fix access after free in vchan_complete()") Signed-off-by: Yoshihiro Shimoda Link: https://lore.kernel.org/r/1592482277-19563-1-git-send-email-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/usb/renesas_usbhs/fifo.c | 23 +++++++++++++---------- drivers/usb/renesas_usbhs/fifo.h | 2 +- 2 files changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index 01c6a48c41bc9..ac9a81ae82164 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -803,7 +803,8 @@ static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) return info->dma_map_ctrl(chan->device->dev, pkt, map); } -static void usbhsf_dma_complete(void *arg); +static void usbhsf_dma_complete(void *arg, + const struct dmaengine_result *result); static void usbhsf_dma_xfer_preparing(struct usbhs_pkt *pkt) { struct usbhs_pipe *pipe = pkt->pipe; @@ -813,6 +814,7 @@ static void usbhsf_dma_xfer_preparing(struct usbhs_pkt *pkt) struct dma_chan *chan; struct device *dev = usbhs_priv_to_dev(priv); enum dma_transfer_direction dir; + dma_cookie_t cookie; fifo = usbhs_pipe_to_fifo(pipe); if (!fifo) @@ -827,11 +829,11 @@ static void usbhsf_dma_xfer_preparing(struct usbhs_pkt *pkt) if (!desc) return; - desc->callback = usbhsf_dma_complete; - desc->callback_param = pipe; + desc->callback_result = usbhsf_dma_complete; + desc->callback_param = pkt; - pkt->cookie = dmaengine_submit(desc); - if (pkt->cookie < 0) { + cookie = dmaengine_submit(desc); + if (cookie < 0) { dev_err(dev, "Failed to submit dma descriptor\n"); return; } @@ -1152,12 +1154,10 @@ static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt, struct dma_chan *chan, int dtln) { struct usbhs_pipe *pipe = pkt->pipe; - struct dma_tx_state state; size_t received_size; int maxp = usbhs_pipe_get_maxpacket(pipe); - dmaengine_tx_status(chan, pkt->cookie, &state); - received_size = pkt->length - state.residue; + received_size = pkt->length - pkt->dma_result->residue; if (dtln) { received_size -= USBHS_USB_DMAC_XFER_SIZE; @@ -1363,13 +1363,16 @@ static int usbhsf_irq_ready(struct usbhs_priv *priv, return 0; } -static void usbhsf_dma_complete(void *arg) +static void usbhsf_dma_complete(void *arg, + const struct dmaengine_result *result) { - struct usbhs_pipe *pipe = arg; + struct usbhs_pkt *pkt = arg; + struct usbhs_pipe *pipe = pkt->pipe; struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); struct device *dev = usbhs_priv_to_dev(priv); int ret; + pkt->dma_result = result; ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); if (ret < 0) dev_err(dev, "dma_complete run_error %d : %d\n", diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h index c3d3cc35cee0f..4a7dc23ce3d35 100644 --- a/drivers/usb/renesas_usbhs/fifo.h +++ b/drivers/usb/renesas_usbhs/fifo.h @@ -50,7 +50,7 @@ struct usbhs_pkt { struct usbhs_pkt *pkt); struct work_struct work; dma_addr_t dma; - dma_cookie_t cookie; + const struct dmaengine_result *dma_result; void *buf; int length; int trans; -- 2.25.1