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Tue, 01 Sep 2026 22:22:22 -0700 (PDT) X-Received: by 2002:a17:90b:2f0b:b0:398:9c00:29ed with SMTP id 98e67ed59e1d1-39aee1f5fc2mr3694846a91.21.1788326542204; Tue, 01 Sep 2026 22:22:22 -0700 (PDT) Received: from [10.218.35.45] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1430eafc907sm3003702c88.9.2026.09.01.22.22.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Sep 2026 22:22:21 -0700 (PDT) Message-ID: Date: Wed, 2 Sep 2026 10:52:15 +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 v5 6/6] PCI: qcom: Enable ASPM disabling during link retraining To: Manivannan Sadhasivam Cc: Bjorn Helgaas , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Jingoo Han , Lorenzo Pieralisi , Rob Herring , Jeff Johnson , Bartosz Golaszewski , =?UTF-8?Q?Krzysztof_Wilczy=C5=84ski?= , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, mhi@lists.linux.dev, linux-wireless@vger.kernel.org, ath11k@lists.infradead.org, qiang.yu@oss.qualcomm.com, Krishna Chaitanya Chundru References: <20260819-bwscale-v5-0-6dea79786b37@oss.qualcomm.com> <20260819-bwscale-v5-6-6dea79786b37@oss.qualcomm.com> Content-Language: en-US From: Krishna Chaitanya Chundru In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTAyMDA0NiBTYWx0ZWRfX4fM1LPHC6aAq W1X1MSigXYE5qJ4ktHEyJZOPmbvijpgHY2kWAI+WjVxrfsTJlet0g7ncGyBV+lr3Wevx+exllDH X6kdksqLnL4++fYEGZcwqFpI7fyR/ncvYJtBg1D9s+9tc+2Rxzg6I6Uf1FbNpoXJq7LAq860Mfz aSm/Nyy56V3ifcoXa8bOnMx7cOBrTR7m5TrARcM1ogep7oa2K0G0PABEJ1acylQ/bmJ5+JbKrTR VWDwJQ2AcX6t2SgD+wEoVbhtgrCk4dJuhPKjh6OFAeld8Kt7quFpJulSnkZhuO2GfcYccpGVg4A StFsXA3/UHqBPeyqwv1PwYv96XxRIAlSULNypEcE1LrOuytt0lyPZWyQrcBMpRg4CixuVurhlBg vjdb701t59RK1y5d/5PHcGyetUmTuUQ8s3A+5PWr0Vxp+b0h5nkHvVSCm+BVkWx+BNniPNCVh3d JwEgEIm8PSo4ZkvfOpw== X-Proofpoint-ORIG-GUID: D-AuDmP1OLMv_bzO9sDLsnkEHeAZO7S7 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTAyMDA0NiBTYWx0ZWRfX4X5EF3bI8dkB OB+lXPxmheyeR+zwqeKoh4Za2bgEO/CXPkEFriX6XTrKpHkCvWyrOUiJmnKlLLsCyzSJR1p/6zC HCD/aAkqnZWx1PCLh6kpC3Z3ZgOcf+g= X-Authority-Analysis: v=2.4 cv=LfkMLDfi c=1 sm=1 tr=0 ts=6a97b28f cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=LpQP-O61AAAA:8 a=B3be4mm0s3FIsxF7KqEA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 a=pioyyrs4ZptJ924tMmac:22 X-Proofpoint-GUID: D-AuDmP1OLMv_bzO9sDLsnkEHeAZO7S7 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-01_06,2026-09-01_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 bulkscore=0 clxscore=1015 impostorscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609020046 On 9/1/2026 1:38 PM, Manivannan Sadhasivam wrote: > On Wed, Aug 19, 2026 at 06:55:57PM +0530, Krishna Chaitanya Chundru wrote: >> Set the disable_aspm_for_retrain flag in qcom_pcie_host_init() to ensure >> ASPM is disabled during link retraining operations. This prevents potential >> issues with link state transitions during bandwidth scaling on Qualcomm >> PCIe controllers. >> > Is it really a controller requirement or a device quirk? yes, it is controller requirement, for the future targets there is a fix, we will not set this for those targets. - Krishna Chaitanya. > >> Signed-off-by: Krishna Chaitanya Chundru > You need to use OSS email. > > - Mani >