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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b9c3cec58f1sm552059566b.33.2026.04.07.03.58.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 Apr 2026 03:58:48 -0700 (PDT) Message-ID: Date: Tue, 7 Apr 2026 12:58:45 +0200 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 3/6] clk: qcom: common: ensure runtime PM suspend completes on probe To: Taniya Das , Bjorn Andersson , Michael Turquette , Stephen Boyd , Abel Vesa , Rob Clark , Sean Paul , Konrad Dybcio , Akhil P Oommen , Dmitry Baryshkov , Abhinav Kumar , Jessica Zhang , Marijn Suijten , David Airlie , Simona Vetter Cc: Ajit Pandey , Imran Shaik , Jagadeesh Kona , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org References: <20260407-gfx-clk-fixes-v1-0-4bb5583a5054@oss.qualcomm.com> <20260407-gfx-clk-fixes-v1-3-4bb5583a5054@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260407-gfx-clk-fixes-v1-3-4bb5583a5054@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=OKEXGyaB c=1 sm=1 tr=0 ts=69d4e36a cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=B7wDQo7gvYI_MMBIZEwA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=ZXulRonScM0A:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-GUID: 5KgwfAyAQIl68nQ8AUwFXPjSfGrTCwza X-Proofpoint-ORIG-GUID: 5KgwfAyAQIl68nQ8AUwFXPjSfGrTCwza X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA3MDEwMiBTYWx0ZWRfX1TBiOWXPDwVK OZUV+Met1Nu56BTZ2cJte9L4ExBPBL9/FEA47/Br7cxMurQJiVBxnoh34/PO/P6K5OVI2/EnwYw al+ZDfc4M2og9G0G1JYBP2F/HGxtbeSe+nT73ywZJBTASn8+Upg3UgNrmzLSLW7sm0v3Ai32l8U iUMSvhUYZoa/tXxC1f1t2YdRfd+J9r6pLlvQdYEVk3I2FC+g+vreABLQzR8h6bDo3d8VQmYh3XM U8TA9gGn0g+pTQBZtnH2vnsm36EluBhYn94puycXNTWCkGDVilnhCoXC1ExKgTIC/U4AB06KMt7 xCyfEeYUggNcc26WQ4/j7Arwx0v8o0LrC6j0HdX7zVr35TeA7GScemnl9cFIdwMo16LB89vvpFw hFoyo8nVv02vrCkeLcZhIPcBYB8eotC0gjziULpWb7ABlFXejN8Akz3oov5IYVFEPuYXLLlpxlb /brekKcVzpdZSovW5pw== 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=2026-04-07_02,2026-04-07_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 priorityscore=1501 spamscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 adultscore=0 malwarescore=0 suspectscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604070102 On 4/7/26 11:30 AM, Taniya Das wrote: > When the clock controller is probed with 'use_rpm' enabled, the > runtime PM reference is currently released using pm_runtime_put(), > which may return before the runtime suspend has completed. This > can leave the power domain transition in progress while the probe > path continues or returns. > > Use pm_runtime_put_sync() instead to ensure the runtime PM “put” > completes synchronously during probe, guaranteeing the device is > fully runtime‑suspended before returning. It's not immediately obvious why that's an issue, is there an observable problem when the transition doesn't complete in time? Konrad