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Tue, 17 Feb 2026 04:45:26 -0800 (PST) X-Received: by 2002:a05:6a00:439b:b0:81f:394a:4897 with SMTP id d2e1a72fcca58-824c95c129bmr14600329b3a.44.1771332326026; Tue, 17 Feb 2026 04:45:26 -0800 (PST) Received: from [192.168.29.33] ([49.37.209.141]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-824c6a4316fsm18224761b3a.23.2026.02.17.04.45.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Feb 2026 04:45:25 -0800 (PST) Message-ID: Date: Tue, 17 Feb 2026 18:15:20 +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 1/2] PCI/pwrctrl: Ensure that the remote endpoint node parent has the supply requirement To: manivannan.sadhasivam@oss.qualcomm.com, Bartosz Golaszewski , Manivannan Sadhasivam , Bjorn Helgaas , Krishna Chaitanya Chundru Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski References: <20260217-pwrctrl-fixes-7-0-v1-0-b5671e58934f@oss.qualcomm.com> <20260217-pwrctrl-fixes-7-0-v1-1-b5671e58934f@oss.qualcomm.com> Content-Language: en-US From: Raj Kumar Bhagat In-Reply-To: <20260217-pwrctrl-fixes-7-0-v1-1-b5671e58934f@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=bqVBxUai c=1 sm=1 tr=0 ts=699462e7 cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=GKJRcqtVwLtxJzZ0uxByqA==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=EUspDBNiAAAA:8 a=NxiB_FYLZp7XA1DtkAQA:9 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjE3MDEwNSBTYWx0ZWRfX/zrcmUn0EyT2 f5XYtDPmNuSgWNTImRVfvrE7tJfegvO4eBGTkpP9Aku+KwW2W3KCVIeKixP0WDX183DaDZ3fz1Q hycTtYJNkur+YpqOnfwPCr4r+G4fgqyV/aUPZ0xuMyFgFQ21vB4vHeOXdoVi3gK0IiCgroZj/Ov iOmTJBnYWWjANZ0JFXI+S7qC4D0CasipP9z+F48ogUhLEAw1EMs9LQ+rDn4CO4N0g4xBagOutd/ suJ2hUx/k8ThXrjbW5L+dsfPUsft9O6qc0aqOm2RhKNu6KxjgveY+Z8njutohAH/PHvqzj+cGN+ ktmyBQnmaOhKK5sEHg4M98u9nZzOSHErkfniUKAi+DlIkbu+/AmeJBJGD1ohMvL7gC3vKJCEzPG 4v5po7b3v/75rQ5MwYDiv4jHDTjquJfepKGRUTZFhCgNtMRylOf6KPYXC1XwJ325Xxmii6+jnWQ GOk+FwnkPCpb4YevfWA== X-Proofpoint-GUID: mokpB0wuaxytlcCMD8h3bvdo2VCJEk8o X-Proofpoint-ORIG-GUID: mokpB0wuaxytlcCMD8h3bvdo2VCJEk8o 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=2026-02-17_01,2026-02-16_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 impostorscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 spamscore=0 adultscore=0 phishscore=0 clxscore=1011 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602170105 On 17-02-2026 15:48, Manivannan Sadhasivam via B4 Relay wrote: > From: Manivannan Sadhasivam > > If OF graph is used in the PCI device node, pwrctrl core currently creates > the pwrctrl device even if the remote endpoint doesn't have the power > supply requirements. Since the device doesn't have any power supply > requirements, there was no pwrctrl driver to probe, leading to PCI > controller driver probe deferral as it waits for all pwrctrl drivers to > probe before starting bus scan. > > This issue happens with Qcom ath12k devices with WSI interface attached to > the Qcom IPQ platforms. > > Fix this issue by checking for the existence of at least one power supply > property in the remote endpoint parent node. To consolidate all the checks, > create a new helper pci_pwrctrl_is_required() and move all the checks > there. > > Fixes: 9db826206f9b ("PCI/pwrctrl: Create pwrctrl device if graph port is found") > Reported-by: Raj Kumar Bhagat > Signed-off-by: Manivannan Sadhasivam Verified it on QCOM IPQ9574 RDP433 with ath12k devices with WSI interface attached. Tested-by: Raj Kumar Bhagat