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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ba451211091sm348953866b.5.2026.04.20.02.51.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Apr 2026 02:51:28 -0700 (PDT) Message-ID: <5b4b68df-593c-41b4-a0af-4a59b10faee0@oss.qualcomm.com> Date: Mon, 20 Apr 2026 11:51:26 +0200 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: [PATCH v3 2/7] spi: qcom-qspi: Fix incomplete error handling in runtime PM To: Viken Dadhaniya , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , cros-qcom-dts-watchers@chromium.org Cc: linux-arm-msm@vger.kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260420-spi-nor-v3-0-7de325a29010@oss.qualcomm.com> <20260420-spi-nor-v3-2-7de325a29010@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260420-spi-nor-v3-2-7de325a29010@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: hpCjbs_e6eFPl_mtx0mLTED_YNH6PIam X-Authority-Analysis: v=2.4 cv=IMgyzAvG c=1 sm=1 tr=0 ts=69e5f723 cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=EUspDBNiAAAA:8 a=SDBIUcquJ5ihQ-it0pQA:9 a=QEXdDO2ut3YA:10 a=zgiPjhLxNE0A:10 a=zZCYzV9kfG8A:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-GUID: hpCjbs_e6eFPl_mtx0mLTED_YNH6PIam X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIwMDA5NSBTYWx0ZWRfX4qXzj1A1/V9w D5Sgb9ZdOloEO1wYZwNVbioPDE3dgG2THsYAaCBtHOrkS+9trnBr+vXI/kexzsEjt4vGKgHPF/6 pxTEMyoWyXSCDerMzUBeyqmBPtmuloCPPl0TvojYLW6PO1R9AoANWO8aAN7ofLJCScU5Aat7Qjg wcJt61qMkQBOJyY8pXMwxpEnVuR/zDv7S0XgvuFNa2ioA0/7iKM99vQFKUZzgLyXpa4dI3mj7bA lmwmimkXZBemibp6lYlTBwDIqNS7d5W6ubT4GpICSwgZKyjYb1SWVhuSQE2DrglkCp5NHbAwxrU nvumDVDAsZD9YcwxkZYVhJ27CsCDsSYYjnU2RVVQw0gk3Rrc9LESjoBrkepHkKsAtPrw7sCC8dj XYBXcOJPKP41QxIZJoAbJM3MnnRef7FIotCkL7x1YM5O+/W1HZua5FaOQfqfSTjq08RUUzbZrkZ +VmtlgXxEvbH5cf306w== 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=2026-04-20_02,2026-04-17_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 clxscore=1015 bulkscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604200095 On 4/20/26 8:12 AM, Viken Dadhaniya wrote: > The runtime PM functions had incomplete error handling that could leave the > system in an inconsistent state. If any operation failed midway through > suspend or resume, some resources would be left in the wrong state while > others were already changed, leading to potential clock/power imbalances. > > Reorder the suspend/resume sequences to avoid brownout risk by ensuring the > performance state is set appropriately before clocks are enabled and clocks > are disabled before dropping the performance state. > > Fix by adding proper error checking for all operations and using goto-based > cleanup to ensure all successfully acquired resources are properly released > on any error. > > Signed-off-by: Viken Dadhaniya > --- Reviewed-by: Konrad Dybcio Konrad