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[129.46.96.20]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36a26d59f0fsm7520287eec.6.2026.10.28.14.32.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 28 Oct 2026 14:32:44 -0700 (PDT) Message-ID: Date: Wed, 28 Oct 2026 15:32:43 -0600 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] bus: mhi: host: pci_generic: Update the default autosuspend_delay_ms as 5000ms To: Slark Xiao , mani@kernel.org, krishna.chundru@oss.qualcomm.com Cc: loic.poulain@oss.qualcomm.com, val@packett.cool, mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20261021105434.29897-1-slark_xiao@163.com> Content-Language: en-US From: Jeff Hugo In-Reply-To: <20261021105434.29897-1-slark_xiao@163.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: jxRNBIq-QFVx9x_WUrCq-cgRpivHvlXU X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDI4MDA4NSBTYWx0ZWRfX4Z6P2gREvvZ+ FzgTDJsISEUbvEUqm8P48mfKpEp8Bo8ZYdL8RPfH2iDjeTMJIoMuyHbQIDiMal6ZcVSxT91masp dESeHsLCsWaTj02q7O2re5Jwx3Qe8NxL1svNhDfxKhHUqM69UNIHIFbwBviSRvrVg7uk6aw/S/2 CVEsyRSzO17AQhsrxyXAlq9k88m+fU0mSngnkaPB4lgM5sBltkGpf6fFj4PpAsYZK1f4rbi3zaB JlrwTk4L36F/B1m6k7BiLNuKjq2wKbC9wZV/yBhdVFkuSrzxV0f6A4p6gvYc0GtBT8+L6aa/PxO rV+/b22tSut5PnbbfCI9Q0nChcvPz57TCGAfxsTHfwT2UCi71NTcGjOMsazW2gSwPwV9+pEgVn3 OvpdLavnUq/kINL73YMZau/ilzxD93DPOcqTQZWzpE7QUcMFWhegEosbr6w/J2QZOftYoYQ0zPB W3/9TeE5ITQdct5/aJA== X-Proofpoint-GUID: jxRNBIq-QFVx9x_WUrCq-cgRpivHvlXU X-Proofpoint-Spam-Info: AW1haW4tMjYxMDI4MDA4NSBTYWx0ZWRfX6ntdr4PnG4R0 /hnvZ/w0xh1M0OaOuKSEqwHVdfiipao5D8gJyjYO9c+YN4z9zPHYqhRIa2vGccNJkL8MKH5sc8r BzlDEf0A5fIbWTOeZtw0jmbm5OmmMtw= X-Authority-Analysis: v=2.4 cv=bYv+w+PB c=1 sm=1 tr=0 ts=6ae269fe cx=c_pps a=cFYjgdjTJScbgFmBucgdfQ==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=VwQbUJbxAAAA:8 a=Byx-y9mGAAAA:8 a=EUspDBNiAAAA:8 a=hbk5_eJ7lmwJhVnmj34A:9 a=QEXdDO2ut3YA:10 a=scEy_gLbYbu1JhEsrz4S:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-28_06,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 malwarescore=0 bulkscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610280085 On 10/21/2026 4:54 AM, Slark Xiao wrote: > For some MHI devices in some specific scenarios, the default value > of autosuspend_delay_ms may not be enough to handle the last wake > event, potentially leading to device timeout or link drop issues. > This can lead to a runtime resume failure and a subsequent system > error: > > [ 8749.089545] mhi mhi0: Resuming from non M3 state (SYS ERROR) > [ 8749.089573] mhi-pci-generic 0000:73:00.0: failed to resume device: -22 > [ 8749.090218] mhi-pci-generic 0000:73:00.0: device recovery started > ... > [ 8752.940324] mhi-pci-generic 0000:73:00.0: reset failed > > Following Qualcomm's recommended settings from Windows and their > suggestion during case discussions, update the default autosuspend > delay to 5000ms for MHI devices. > > Fixes: d3800c1dce24 ("bus: mhi: pci_generic: Add support for runtime PM") > Cc: stable@vger.kernel.org > Signed-off-by: Slark Xiao Reviewed-by: Jeff Hugo