From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BD12F3CCA12 for ; Thu, 10 Sep 2026 07:26:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789025181; cv=none; b=ZK7sR4bKx+xG13MtGhG0qZabU4CD6kzWDH1ajQpq5OTTc+g2gCrbQ9Fi8nMLk1ni4G8t9z3ItBQjLgV6U0vH1Up1EAXyTxkRBDHPpxAC3R1GbWS1fUkX3Gy5uKncuDatFZ2U1raTue3326kSCdSOp8FlwlmYkdGr9ipBT3yE9W8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789025181; c=relaxed/simple; bh=cnSWqQcASQMLKInn2lI53+JxHJe6k/AWPc/O9s1mt7M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RdrAiE9sRKXzAT7Sec/aImaSyz8iq7zDiEvnmU9B9frzPshRxCfBN34HgRIOHl4TxVpb8oqAoMJjppJj2FKZxuDQleaNiiRw8FpoWfLnDxbYk9iY/lwwgjoKpkNwMNxDnzzfOyN44y6ASjjDSvHsAxZ0KhSV87wM2/vmxgmYOHw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=ggpwfu74; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=IQAvvt0c; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="ggpwfu74"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="IQAvvt0c" Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 68A71BcM754341 for ; Thu, 10 Sep 2026 07:26:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=qcppdkim1; bh=2DuUysS3GqngaCVO/CWJC3HZ jN8ot3KwdZfBElTMIEQ=; b=ggpwfu74ffMEUwo6noqYCw+MoJyWa+Vr8ZCT65yD nlMBH5dtYKZjIWlvNYJjDEKxTKAm1c9mc+rj8+VQ5MmYXUfuLwn3+BPmslgIY6ML NMLAPnZcy9D861SWcjqIBK1hYRNV16kjrAtFsZx9y+4jZQPHRyqok6uMXrMQUq5Y ieX7RhmcwmEFFCaIEop+zQyVapJj7gKqC4myFaOwcyPP8yZcWwwx3vR5l1B2yAFR +FyHJHeBvakLSRkpOqNrL5hkt1Kte6E9ccBFdZl/LDAMCPP+d35Py1+G0COQGojz 3EUnVIiQz+1SD8g3HvNeU8E24E88D+xHajdEpGL/+C5puw== Received: from mail-pj1-f69.google.com (mail-pj1-f69.google.com [209.85.216.69]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4gkqsvr3an-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Thu, 10 Sep 2026 07:26:16 +0000 (GMT) Received: by mail-pj1-f69.google.com with SMTP id 98e67ed59e1d1-398d0010cfaso13344767a91.3 for ; Thu, 10 Sep 2026 00:26:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1789025176; x=1789629976; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=2DuUysS3GqngaCVO/CWJC3HZjN8ot3KwdZfBElTMIEQ=; b=IQAvvt0cimutJmy/bpLGPhGVfAfeW//U9wvcAQ0BXmbPQT5qaudf15Mr1Vhb/Qn2Zv un4VcxOnyCkz1l6f3riVt6YSrt9x1dYQuvm+LZJzIEZUImtcghQg3IXAWJorxdVdIsUK EcgxpKbxPPxJtEJDCCBPJnUdjzlKZReVPjZ/STbXnIIp5Of0s4YVyQMFkPpU8WR6dn/F DHuxZ12MnT5tH0InX6stWcEqr9XU3OV4cSzlJno6qJM2SIe0csA/maVsLb0vO/lXTqjY 198JTCdCYlJJOAuCjHWB9onyVD5gWXfg8sdmr0iLitpObnYGGAWhPwvNIpDLqK0VUg6H jkPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1789025176; x=1789629976; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=2DuUysS3GqngaCVO/CWJC3HZjN8ot3KwdZfBElTMIEQ=; b=lyURDxhpCtev8YwF7AtyAKlq5YrSjto53Xafp+CHDP0ARlf2vfTLOtgyZYPALSeJJ2 PTMrQ0nAyhnko8/YqTKkgWQVAhBDabGKU6iLjboKgdJS7utKDkrYkPe2F1msPYcydZpi s9pGjptjDT3CY/cLh4JK5XZ4V2cmtTPtRyfjtSZJV1pcieSIMtIwjDT33GEgEMBoIoeW uXH3ZJTykcQUFab7u7wo6oiPwRcywmKNOWRBvwBehgYCq4SjxnavwF/tdvWkM4LLHcMe LkCVzv1N/BbS3QXtqLeNy+Z8K/U3bntfoaOyNn3yapoSS1REWeDhKfOZHd5wk5xap7O9 YKXQ== X-Forwarded-Encrypted: i=1; AKwUvBxzP0lUcL8WYAA6geI8jGKsfQShEmFFbDEvPaLKMtjWvm0D8Ji8xKgyuwsNJYQOykiH7A/TAclBQAw=@vger.kernel.org X-Gm-Message-State: AFuF++nmR/UVNKMhbc8mPryDFUBCpQvFPYlwUnwD0JLixdzsW226Yk8O EFcdwu8H8DTZcNPYBeWbICKpxuUAQxPwyYrCDgCOMwdoYwy0zWwFXuvSbeGsZ5F1DqL0vM0RyQJ hPJ3xzXvOFDTX0J8FIz+Kz0NuFevik01jXsEDxLrYI59XMf4zUG2sSFzvEadUXNk= X-Gm-Gg: AYBFou0DVtkGzZmScZTPMcUdmDVF6YJsjQSxZ6VkPnCpFcllr3Fw7osh22pon8En9JF 4mwKVvvaclQ2IchVQ3fd+AT/3RdzwUa1DQ2nucsGi4YpnYMaxDMbpUDIDtRnYl2ajxirbbf4Cvg 8+weu1K2wNoqdp/xmbcOR5RAbYR/QOHEdoDNtxN3rFU9eKHHQ7iewVWFiWeHwhdYrdvAFiuFH98 3Se+5/Jb9gRUFOY3tdm5BBG8cSSesBKjdv7XcsXxIq2ngV3ElB1vlPMjgjkmhe2kvNRojqDFeCC YhGZ2p68nmZyCriaztmi5rI1Rror8bDi3HWgm8otZ8uh2lTVHDrpOitCaPvtwAwpkZswmPjetk5 lEMm1Jcc/PVKcjHJsyH/WBZzKNz/rycL7t96IZRRDl0E= X-Received: by 2002:a17:90b:520e:b0:398:9be8:ea65 with SMTP id 98e67ed59e1d1-39bac3c452dmr16830064a91.18.1789025175622; Thu, 10 Sep 2026 00:26:15 -0700 (PDT) X-Received: by 2002:a17:90b:520e:b0:398:9be8:ea65 with SMTP id 98e67ed59e1d1-39bac3c452dmr16830014a91.18.1789025175191; Thu, 10 Sep 2026 00:26:15 -0700 (PDT) Received: from QCOM-aGQu4IUr3Y (i-global052.qualcomm.com. [199.106.103.52]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1432435648esm60431654c88.5.2026.09.10.00.26.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2026 00:26:14 -0700 (PDT) Date: Thu, 10 Sep 2026 15:26:10 +0800 From: Shawn Guo To: Krishna Kurapati Cc: Thinh Nguyen , Greg Kroah-Hartman , linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Val Packett Subject: Re: [PATCH] Revert "usb: dwc3: qcom: Add support to skip phy management by USB core" Message-ID: References: <20260909-xhci-fixes-revert-v1-1-7cc97fa0f307@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260909-xhci-fixes-revert-v1-1-7cc97fa0f307@oss.qualcomm.com> X-Authority-Analysis: v=2.4 cv=DdOCOftW c=1 sm=1 tr=0 ts=6aa25b98 cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=b9+bayejhc3NMeqCNyeLQQ==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=18rzLyZ0tFcJ6Np8f_0A:9 a=CjuIK1q_8ugA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTEwMDA3OSBTYWx0ZWRfX8bLPBgytmguS bEkfR6Vdnbi11ALvtt4YJLQkyNC+IKL3Cm/YSWgEOkbJad8B4oS+HtEucXXSBtnhq5dgY6O2wRx 6lFp50F1ruYkf4Er+wV8WlZqKxMrRyd0f9LweUwRw134GdWVN58JPRV9KRPAtNweqaXHd4qz3q1 TXfaAZRGAkMjlfHc5AW5ZWYlGBe9oooJeFS4tex6+1XD0Lj+qohtcsbotnLAXpVoWPp0LLSV7Gf 5D7ApZsIm5TeIKEvIVJVJBBgPLX1Fnt2abcKSuKirZh08qvxWjVDnwIZrXj2CvaYJ49Ag5SEx35 nG6R4FxPywU5OgSwa64408rKZVkopDqwsaTacxqjIKFZWoYaCoGN+NjNaIjwksV/3wilvkJzyxy eUO3r6D9B65GdiIgsbnkCrNBz11eminNeOW07ZBcwWfM+50qwIiKYZqPzfmNTu5nWaoAZl8xaCr a1mbR3GVgjGWxBXHWQw== X-Proofpoint-ORIG-GUID: PzCsMRWz7ZmEPo4m9pMRMFXqIsDzkMMp X-Proofpoint-Spam-Info: AW1haW4tMjYwOTEwMDA3OSBTYWx0ZWRfX0nE17YsiWhWH 33gjUFUyBg4l/44onjTWM3ZW46F1tWR2kltSDrJFbzUxpGj7jUcHXkD06nGKv1vQdxYIMSYCfRQ vC4g9YWVdWMOsOvZqIeFDfLYR2pTlug= X-Proofpoint-GUID: PzCsMRWz7ZmEPo4m9pMRMFXqIsDzkMMp X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-10_02,2026-09-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 phishscore=0 malwarescore=0 adultscore=0 spamscore=0 bulkscore=0 suspectscore=0 lowpriorityscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609100079 On Wed, Sep 09, 2026 at 03:19:10PM +0530, Krishna Kurapati wrote: > This reverts commit be7b1c68cd3e4fc0f5a4e1b85696de1052f21f2f. > > Commit be7b1c68cd3e ("usb: dwc3: qcom: Add support to skip phy management by USB core") > is causing a regression on qualcomm platforms. > > During role switch it tends to cause the following crash: > > [ 5.620951] refcount_t: underflow; use-after-free. > [ 5.621114] Call trace: > [ 5.621115] refcount_warn_saturate+0xd8/0x140 (P) > [ 5.621117] kobject_put+0x11c/0x230 > [ 5.621121] software_node_notify_remove+0xdc/0xf8 > [ 5.621124] device_del+0x1dc/0x328 > [ 5.621126] usb_disconnect+0x1d8/0x348 > [ 5.621129] usb_remove_hcd+0x100/0x2a8 > [ 5.621131] xhci_plat_remove+0x8c/0x170 > [ 5.621134] platform_remove+0x28/0x40 > [ 5.621135] device_release_driver_internal+0x174/0x290 > [ 5.621138] device_release_driver+0x20/0x38 > [ 5.621140] bus_remove_device+0x19c/0x1f8 > [ 5.621142] device_del+0x1c4/0x328 > [ 5.621143] platform_device_unregister+0x34/0xc0 > [ 5.621145] dwc3_host_exit+0x50/0x70 > [ 5.621146] __dwc3_set_mode+0xa4/0x378 > > [ 5.644535] Unable to handle kernel paging request at virtual address > [ 5.644657] Workqueue: events_freezable __dwc3_set_mode > [ 5.644664] pc : __pi_strcmp+0x9c/0x140 > [ 5.644668] lr : software_node_property_present+0x60/0x98 > [ 5.644697] Call trace: > [ 5.644698] __pi_strcmp+0x9c/0x140 (P) > [ 5.644700] device_property_present+0x9c/0xc0 > [ 5.644703] dwc3_gadget_init+0x230/0x7b0 > [ 5.644704] __dwc3_set_mode+0x314/0x378 > [ 5.644707] process_scheduled_works+0x1b8/0x538 > [ 5.644710] worker_thread+0x1fc/0x2f8 > [ 5.644711] kthread+0x114/0x148 > [ 5.644713] ret_from_fork+0x10/0x20 > > Revert skipping of usb core phy management for Qualcomm platforms to avoid > the above issues. > > Reported-by: Val Packett > Closes: https://lore.kernel.org/all/f9926203-ee69-4e18-b6c7-95261ba10807@packett.cool/ > Signed-off-by: Krishna Kurapati I'm seeing a duplicate sysfs filename issue on Nord platform. This revert fixes it, so: Tested-by: Shawn Guo [ 6.412085] sysfs: cannot create duplicate filename '/devices/platform/soc@0/a400000.usb/software_node' [ 6.412088] CPU: 3 UID: 0 PID: 128 Comm: kworker/u73:3 Not tainted 7.3.0-rc2-next-20260908-00064-gde909f9bbb2a #16 PREEMPT(full) [ 6.412090] Hardware name: Qualcomm Technologies, Inc. SA8797P Ride Embedded (DT) [ 6.412091] Workqueue: events_unbound deferred_probe_work_func [ 6.412098] Call trace: [ 6.412099] show_stack+0x18/0x24 (C) [ 6.412103] dump_stack_lvl+0x74/0x8c [ 6.412107] dump_stack+0x18/0x24 [ 6.412109] sysfs_warn_dup+0x64/0x80 [ 6.412112] sysfs_do_create_link_sd+0xf0/0xf8 [ 6.412114] sysfs_create_link+0x20/0x40 [ 6.412116] software_node_notify+0xb0/0x100 [ 6.412117] device_create_managed_software_node+0xec/0x108 [ 6.412119] dwc3_qcom_set_swnode+0x5c/0x8c [ 6.412122] dwc3_qcom_probe+0x4d4/0x9c4 [ 6.412123] platform_probe+0x5c/0x9c [ 6.412125] really_probe+0xbc/0x29c [ 6.412127] __driver_probe_device+0x16c/0x19c [ 6.412129] driver_probe_device+0x3c/0x114 [ 6.412131] __device_attach_driver+0xb8/0x118 [ 6.412132] bus_for_each_drv+0x88/0xe8 [ 6.412134] __device_attach+0xa0/0x190 [ 6.412136] device_initial_probe+0x50/0x54 [ 6.412137] bus_probe_device+0x38/0xa0 [ 6.412139] deferred_probe_work_func+0x88/0xc0 [ 6.412141] process_one_work+0x180/0x2dc [ 6.412143] worker_thread+0x188/0x300 [ 6.412145] kthread+0x118/0x124 [ 6.412146] ret_from_fork+0x10/0x20