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,URIBL_BLOCKED,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 4947BC4363A for ; Tue, 27 Oct 2020 00:24:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1055620759 for ; Tue, 27 Oct 2020 00:24:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603758263; bh=KkuASOFWGIqf3UsY04CMhLGnDkmqL8+jqyyRQFd2K+Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=A9buti5uUfOL2rVFpH1h/JAaMlXuDDkoMdrQ/Mh5KhQMqM68wyY+oXIbjUQQnAUh2 oiOdXRUsFwgO7yGibMT1WFudT2V7mrWwL+WEyk0xUiMmw7DHAoLfl5XQHdjIyGM2kT HkwXLSOFzH8Xn4mCdbCnKvy6fVcgsWOW2T66aqeU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2441544AbgJ0AYV (ORCPT ); Mon, 26 Oct 2020 20:24:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:58860 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410236AbgJZXxx (ORCPT ); Mon, 26 Oct 2020 19:53:53 -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 059D521D7B; Mon, 26 Oct 2020 23:53:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603756432; bh=KkuASOFWGIqf3UsY04CMhLGnDkmqL8+jqyyRQFd2K+Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XL+olBy5pLwQrYE5R3rglpuedl0RmlTmyZBCPPkJKdWQ5IudhxcBXjNMge3iSAmzF w5wSSEZGU11nhN7Ld8hNQpF59ey6hWj7WsHDF/0rMf+PLf0zj+mUZOOn3pPFg+kApD IqiYSOyJ+/NNjCsDsU3UMIPDF1+yB0eEhKuhsMi0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Li Jun , Felipe Balbi , Sasha Levin , linux-usb@vger.kernel.org Subject: [PATCH AUTOSEL 5.8 087/132] usb: dwc3: core: do not queue work if dr_mode is not USB_DR_MODE_OTG Date: Mon, 26 Oct 2020 19:51:19 -0400 Message-Id: <20201026235205.1023962-87-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201026235205.1023962-1-sashal@kernel.org> References: <20201026235205.1023962-1-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: Li Jun [ Upstream commit dc336b19e82d0454ea60270cd18fbb4749e162f6 ] Do not try to queue a drd work if dr_mode is not USB_DR_MODE_OTG because the work is not inited, this may be triggered by user try to change mode file of debugfs on a single role port, which will cause below kernel dump: [ 60.115529] ------------[ cut here ]------------ [ 60.120166] WARNING: CPU: 1 PID: 627 at kernel/workqueue.c:1473 __queue_work+0x46c/0x520 [ 60.128254] Modules linked in: [ 60.131313] CPU: 1 PID: 627 Comm: sh Not tainted 5.7.0-rc4-00022-g914a586-dirty #135 [ 60.139054] Hardware name: NXP i.MX8MQ EVK (DT) [ 60.143585] pstate: a0000085 (NzCv daIf -PAN -UAO) [ 60.148376] pc : __queue_work+0x46c/0x520 [ 60.152385] lr : __queue_work+0x314/0x520 [ 60.156393] sp : ffff8000124ebc40 [ 60.159705] x29: ffff8000124ebc40 x28: ffff800011808018 [ 60.165018] x27: ffff800011819ef8 x26: ffff800011d39980 [ 60.170331] x25: ffff800011808018 x24: 0000000000000100 [ 60.175643] x23: 0000000000000013 x22: 0000000000000001 [ 60.180955] x21: ffff0000b7c08e00 x20: ffff0000b6c31080 [ 60.186267] x19: ffff0000bb99bc00 x18: 0000000000000000 [ 60.191579] x17: 0000000000000000 x16: 0000000000000000 [ 60.196891] x15: 0000000000000000 x14: 0000000000000000 [ 60.202202] x13: 0000000000000000 x12: 0000000000000000 [ 60.207515] x11: 0000000000000000 x10: 0000000000000040 [ 60.212827] x9 : ffff800011d55460 x8 : ffff800011d55458 [ 60.218138] x7 : ffff0000b7800028 x6 : 0000000000000000 [ 60.223450] x5 : ffff0000b7800000 x4 : 0000000000000000 [ 60.228762] x3 : ffff0000bb997cc0 x2 : 0000000000000001 [ 60.234074] x1 : 0000000000000000 x0 : ffff0000b6c31088 [ 60.239386] Call trace: [ 60.241834] __queue_work+0x46c/0x520 [ 60.245496] queue_work_on+0x6c/0x90 [ 60.249075] dwc3_set_mode+0x48/0x58 [ 60.252651] dwc3_mode_write+0xf8/0x150 [ 60.256489] full_proxy_write+0x5c/0xa8 [ 60.260327] __vfs_write+0x18/0x40 [ 60.263729] vfs_write+0xdc/0x1c8 [ 60.267045] ksys_write+0x68/0xf0 [ 60.270360] __arm64_sys_write+0x18/0x20 [ 60.274286] el0_svc_common.constprop.0+0x68/0x160 [ 60.279077] do_el0_svc+0x20/0x80 [ 60.282394] el0_sync_handler+0x10c/0x178 [ 60.286403] el0_sync+0x140/0x180 [ 60.289716] ---[ end trace 70b155582e2b7988 ]--- Signed-off-by: Li Jun Signed-off-by: Felipe Balbi Signed-off-by: Sasha Levin --- drivers/usb/dwc3/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 25c686a752b0f..020e87a571381 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -120,9 +120,6 @@ static void __dwc3_set_mode(struct work_struct *work) unsigned long flags; int ret; - if (dwc->dr_mode != USB_DR_MODE_OTG) - return; - pm_runtime_get_sync(dwc->dev); if (dwc->current_dr_role == DWC3_GCTL_PRTCAP_OTG) @@ -203,6 +200,9 @@ void dwc3_set_mode(struct dwc3 *dwc, u32 mode) { unsigned long flags; + if (dwc->dr_mode != USB_DR_MODE_OTG) + return; + spin_lock_irqsave(&dwc->lock, flags); dwc->desired_dr_role = mode; spin_unlock_irqrestore(&dwc->lock, flags); -- 2.25.1