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[47.55.120.4]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4ee48d3bcc4sm89196511cf.6.2025.11.24.10.16.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Nov 2025 10:16:45 -0800 (PST) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1vNb7E-00000001xC5-2DQM; Mon, 24 Nov 2025 14:16:44 -0400 Date: Mon, 24 Nov 2025 14:16:44 -0400 From: Jason Gunthorpe To: ankita@nvidia.com Cc: yishaih@nvidia.com, skolothumtho@nvidia.com, kevin.tian@intel.com, alex@shazbot.org, aniketa@nvidia.com, vsethi@nvidia.com, mochs@nvidia.com, Yunxiang.Li@amd.com, yi.l.liu@intel.com, zhangdongdong@eswincomputing.com, avihaih@nvidia.com, bhelgaas@google.com, peterx@redhat.com, pstanner@redhat.com, apopple@nvidia.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, cjia@nvidia.com, kwankhede@nvidia.com, targupta@nvidia.com, zhiw@nvidia.com, danw@nvidia.com, dnigam@nvidia.com, kjaju@nvidia.com Subject: Re: [PATCH v5 6/7] vfio/nvgrace-gpu: Inform devmem unmapped after reset Message-ID: <20251124181644.GW233636@ziepe.ca> References: <20251124115926.119027-1-ankita@nvidia.com> <20251124115926.119027-7-ankita@nvidia.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=us-ascii Content-Disposition: inline In-Reply-To: <20251124115926.119027-7-ankita@nvidia.com> On Mon, Nov 24, 2025 at 11:59:25AM +0000, ankita@nvidia.com wrote: > @@ -1048,12 +1050,29 @@ static const struct pci_device_id nvgrace_gpu_vfio_pci_table[] = { > > MODULE_DEVICE_TABLE(pci, nvgrace_gpu_vfio_pci_table); > > +static void nvgrace_gpu_vfio_pci_reset_done(struct pci_dev *pdev) > +{ > + struct vfio_pci_core_device *core_device = dev_get_drvdata(&pdev->dev); > + struct nvgrace_gpu_pci_core_device *nvdev = > + container_of(core_device, struct nvgrace_gpu_pci_core_device, > + core_device); > + > + lockdep_assert_held_write(&core_device->memory_lock); > + > + nvdev->reset_done = true; > +} Seems surprising/wrong at least needs a comment. What on earth is ensuring that lockdep within a PCI callback?? > static struct pci_driver nvgrace_gpu_vfio_pci_driver = { > .name = KBUILD_MODNAME, > .id_table = nvgrace_gpu_vfio_pci_table, > .probe = nvgrace_gpu_probe, > .remove = nvgrace_gpu_remove, > - .err_handler = &vfio_pci_core_err_handlers, > + .err_handler = &nvgrace_gpu_vfio_pci_err_handlers, Jason