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Wed, 14 Jan 2026 03:04:24 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6585420049; Wed, 14 Jan 2026 03:04:24 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2167820040; Wed, 14 Jan 2026 03:04:21 +0000 (GMT) Received: from Linuxdev.ibmuc.com (unknown [9.124.217.241]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 14 Jan 2026 03:04:20 +0000 (GMT) From: Madhavan Srinivasan To: mahesh@linux.ibm.com, oohall@gmail.com, mpe@ellerman.id.au, npiggin@gmail.com, Christophe Leroy , Narayana Murty N Cc: bhelgaas@google.com, tpearson@raptorengineering.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, vaibhav@linux.ibm.com, sbhat@linux.ibm.com, ganeshgr@linux.ibm.com Subject: Re: [PATCH v2 1/1] powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling Date: Wed, 14 Jan 2026 08:34:20 +0530 Message-ID: <176835971846.41689.7422242896755052198.b4-ty@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251210142559.8874-1-nnmlinux@linux.ibm.com> References: <20251210142559.8874-1-nnmlinux@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: NAa5tDa91Kdz4wke-TWEn1yzkmO0oua7 X-Authority-Analysis: v=2.4 cv=LLxrgZW9 c=1 sm=1 tr=0 ts=696707bd cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=dQPHt5QSkiOP-JdZhdQA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTE0MDAxOSBTYWx0ZWRfXxf/TfS2MtWSb aoEyKVURsyGMqTVElXvs2ZbjPZ7Q9myt9u6gBFLH5+LNVKGSzlHUgcvuifgOMLIH4I+9kWs/l+P TC1/yLwiEVWytG10rZAExOeTr+1QgsVvi+fQ4k312DKpp3BJVlks/VYZ6NP2TVDCrkx/P/KIAlh MKO4CIWDHG4a3g6j/+KQQ0+hNH7nCbZ3bKcR5Kk416XB9nAI0/6NZFpjtE1OeNkACI/JVO9q4QS BkUfOzrT90vjvIF0+M0LpNPvGjVi7w7LFm+dA5+t7uIlPO+TS2ksfICQLlPA+GsludDZI0AWVo6 xl8Ff1eGl379yy2FuoBMG/puBX73cbMMzlAsMRXbDlO1nHL4u8IurJ6puk0Y4NHYxEF0tBZ2dsT SEKCJx3xyG0Q84Ns/gc/c5vPjxzFftADKWjw7df9FszsI8zU07LIMehNbf/U1i9ktcENmWPuUOu eSyLpS66gtqF4qWws6A== X-Proofpoint-ORIG-GUID: mKa2NkiaAbKPMVmLcyrTNMLzquUwIvo5 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-14_01,2026-01-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 clxscore=1011 spamscore=0 impostorscore=0 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2512120000 definitions=main-2601140019 On Wed, 10 Dec 2025 08:25:59 -0600, Narayana Murty N wrote: > The recent commit 1010b4c012b0 ("powerpc/eeh: Make EEH driver device > hotplug safe") restructured the EEH driver to improve synchronization > with the PCI hotplug layer. > > However, it inadvertently moved pci_lock_rescan_remove() outside its > intended scope in eeh_handle_normal_event(), leading to broken PCI > error reporting and improper EEH event triggering. Specifically, > eeh_handle_normal_event() acquired pci_lock_rescan_remove() before > calling eeh_pe_bus_get(), but eeh_pe_bus_get() itself attempts to > acquire the same lock internally, causing nested locking and disrupting > normal EEH event handling paths. > > [...] Applied to powerpc/next. [1/1] powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling https://git.kernel.org/powerpc/c/815a8d2feb5615ae7f0b5befd206af0b0160614c cheers