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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b976d096d58sm40840066b.62.2026.03.13.05.03.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 13 Mar 2026 05:03:10 -0700 (PDT) Message-ID: Date: Fri, 13 Mar 2026 13:03:08 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: qcom_slim_ngd_ctrl_probe: blocked on a mutex To: Tj , Srinivas Kandagatla Cc: linux-arm-msm@vger.kernel.org, linux-sound@vger.kernel.org References: <7672009d-7b14-4df2-b057-1ca5ef4fe79e@oss.qualcomm.com> <539a5f37-e06f-44be-abda-3afa69397711@proton.me> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <539a5f37-e06f-44be-abda-3afa69397711@proton.me> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: wkVla7GFSMuAxQ_PAYKGbu-1CzXoR94o X-Proofpoint-GUID: wkVla7GFSMuAxQ_PAYKGbu-1CzXoR94o X-Authority-Analysis: v=2.4 cv=ZKfaWH7b c=1 sm=1 tr=0 ts=69b3fd01 cx=c_pps a=zPxD6eHSjdtQ/OcAcrOFGw==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=unwBlSNg4wIqc4wMQw4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=y8BKWJGFn5sdPF1Y92-H:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzEzMDA5NSBTYWx0ZWRfXyOvPKwzGgZme qq27YuLohd687+i6rkHOhc5ji+8iDKJNlse8g/L9Qa3y+sxA5kg2gbrIvYCLjNCgO+yyQx6r6n2 phH2x5VlW1eOKDPykXjDQFBeYSuNb0kWlei9YZTRliQ7uN0dmwuFhweYqd6UYb/Rusjs9FNZUOh NoMbH+IaFqnchquap3KBD+vviEG6Wj8EFbzN0VRoCI23il3+AZsukYoWKWDBcZpCCRF2Xa7+MJB m2U8VraQ6f5irsVkF/zDe9juzHB5lVND4IO1obff/nOuIeisoGEqVfR/WT633uBpEo7K89qA9lF OS3x0ps3mBsbCKtzIIxDbAsic9oj9kXu1ujxNxCY2+evrC9O4uyRY8fFylw2Cbi3Slc17zk2tPd rDDG7YcRxEXON+Q2iV6uLX++KL6ZCC4cFz1BwfOhSjwvLGRqM2GcnDhVpSnFzxsCGwKhKr9SlP6 u4wAyzgtjpAa45hAVjg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-13_02,2026-03-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1015 spamscore=0 malwarescore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 priorityscore=1501 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603130095 On 3/13/26 1:00 PM, Tj wrote: > On 13/03/2026 09:54, Konrad Dybcio wrote: >> On 3/12/26 1:14 AM, Tj wrote: >>> Currently working on sdm850 device (Samsung Galaxy Book2 W737) and >>> seeing kernel hang early and never recover when probing qcom-ngd-ctrl >>> platform driver.  Only able to capture a photo of the stack traces as a >>> result; I'll try to transcribe the important parts here. My diagnosis >>> suggests that the module is calling __platform_driver_register() twice >>> and may be the cause of the hang. >> https://lore.kernel.org/all/20260309-slim-ngd-dev-v1-0-5843e3ed62a3@oss.qualcomm.com/ >> >> should be able to help with some of that > > Thank-you. This morning I'd just resolved the platform_driver_register > issue myself so now seeing > > qcom,slim-ngd-ctrl 171c0000.slim-ngd: SLIM SAT: Rcvd master capability > qcom,slim-ngd-ctrl 171c0000.slim-ngd: SLIM controller Registered > > However the order of registration of the two drivers is important; ctrl > should be last, so I'm surprised that Patch 1 works. Please direct your findings to that thread. Konrad