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Tue, 03 Feb 2026 20:17:21 -0800 (PST) X-Received: by 2002:a17:902:c411:b0:2a8:ac0f:9ae4 with SMTP id d9443c01a7336-2a933fb5b7amr15894295ad.48.1770178640788; Tue, 03 Feb 2026 20:17:20 -0800 (PST) Received: from [10.218.10.142] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a93394e5d4sm8837575ad.56.2026.02.03.20.17.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Feb 2026 20:17:20 -0800 (PST) Message-ID: Date: Wed, 4 Feb 2026 09:47:16 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] usb: dwc3: gadget: Move vbus draw to workqueue context To: Kyle Tso Cc: Thinh Nguyen , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20260129111403.3081730-1-prashanth.k@oss.qualcomm.com> Content-Language: en-US From: Prashanth K In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=afVsXBot c=1 sm=1 tr=0 ts=6982c852 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=1XWaLZrsAAAA:8 a=EUspDBNiAAAA:8 a=QySTlIg7yQLGu7ZqArQA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-ORIG-GUID: 8-tf4B5qwNFSVWiabPrUFdfI9_2jkG2K X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjA0MDAyNyBTYWx0ZWRfX12+hEgi6IO2n omNNEefmo/MlcolWugC95408MJyRJeh+8NWQ16ncpEgr9FlXnEs0yey/fNM26rZDYtFOV1TS5Gk X0ArvDH+x8oprxxHJtBLdlNNGkWlEx4tkUPlA5v5pewjx+jTv0ThSqBGRxkyy/+qCRSuM2W5TBH XPBO70pnKlPl+9/AOo2zzksL97Y9B4ZUPWIkRHcyOTtoS5jQsZjJ6NJ0sfLCi2WXqriqOlSzvWZ YokgG3EEjIoHIwhRHm7Nu/RJWCmoQVxQqKS3c6R1eG7vR55YWwTJSJ+UtyO2/qjQrbenX+tdMaG odInKliz4bbrxeCJc5dBVN0VIjuHNW/2VxwyMMjkYPQrRLS3/ZvlPQvFU0Tz5PryrpgJat4u039 1L9w0cpjzzXbEjtgtaj313uAwPQST+CvtwSms7JEoVPyctGTz9sr86QeYZseWYSwLUyC6d0vrzg X7oqvAKHUuOOHPBrvDw== X-Proofpoint-GUID: 8-tf4B5qwNFSVWiabPrUFdfI9_2jkG2K X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-03_07,2026-02-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 bulkscore=0 suspectscore=0 priorityscore=1501 malwarescore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602040027 On 2/4/2026 9:29 AM, Kyle Tso wrote: > On Thu, Jan 29, 2026 at 7:16 PM Prashanth K > wrote: >> >> Currently dwc3_gadget_vbus_draw() can be called from atomic >> context, which in turn invokes power-supply-core APIs. And >> some these PMIC APIs have operations that may sleep, leading >> to kernel panic. >> >> Fix this by moving the vbus_draw into a workqueue context. >> >> Fixes: 66e0ea341a2a ("usb: dwc3: core: Defer the probe until USB power supply ready") > > I think the following patch is the one to fix: > > https://lore.kernel.org/all/20210222115149.3606776-3-raychi@google.com/ > Yes agreed, i added 66e0ea341a2a because it can be backported without conflicts only till 66e0ea341a2a, but I'll change it to the correct one. Thanks for confirming, Prashanth K