Messages in this thread | | | From | Jake Oshins <> | Subject | RE: [PATCH] PCI: hv: Fix interrupt cleanup path | Date | Tue, 12 Jul 2016 15:54:57 +0000 |
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> -----Original Message----- > From: Cathy Avery [mailto:cavery@redhat.com] > Sent: Tuesday, July 12, 2016 8:31 AM > To: KY Srinivasan <kys@microsoft.com>; Haiyang Zhang > <haiyangz@microsoft.com>; Jake Oshins <jakeo@microsoft.com>; > bhelgaas@google.com > Cc: vkuznets@redhat.com; devel@linuxdriverproject.org; linux- > pci@vger.kernel.org; linux-kernel@vger.kernel.org > Subject: [PATCH] PCI: hv: Fix interrupt cleanup path > > SR-IOV disabled from the host causes a memory leak. > pci-hyperv usually first receives a PCI_EJECT notification > and then proceeds to delete the hpdev list entry in > hv_eject_device_work(). Later in hv_msi_free() since the > device is no longer on the device list hpdev is NULL > and hv_msi_free returns without freeing int_desc as part of > hv_int_desc_free(). > > Signed-off-by: Cathy Avery <cavery@redhat.com> Acked-by: Jake Oshins <jakeo@microsoft.com>
> --- > drivers/pci/host/pci-hyperv.c | 14 ++++++++------ > 1 file changed, 8 insertions(+), 6 deletions(-) > > diff --git a/drivers/pci/host/pci-hyperv.c b/drivers/pci/host/pci-hyperv.c > index 7e9b2de..449d053 100644 > --- a/drivers/pci/host/pci-hyperv.c > +++ b/drivers/pci/host/pci-hyperv.c > @@ -732,16 +732,18 @@ static void hv_msi_free(struct irq_domain *domain, > struct msi_domain_info *info, > > pdev = msi_desc_to_pci_dev(msi); > hbus = info->data; > - hpdev = get_pcichild_wslot(hbus, devfn_to_wslot(pdev->devfn)); > - if (!hpdev) > + int_desc = irq_data_get_irq_chip_data(irq_data); > + if (!int_desc) > return; > > - int_desc = irq_data_get_irq_chip_data(irq_data); > - if (int_desc) { > - irq_data->chip_data = NULL; > - hv_int_desc_free(hpdev, int_desc); > + irq_data->chip_data = NULL; > + hpdev = get_pcichild_wslot(hbus, devfn_to_wslot(pdev->devfn)); > + if (!hpdev) { > + kfree(int_desc); > + return; > } > > + hv_int_desc_free(hpdev, int_desc); > put_pcichild(hpdev, hv_pcidev_ref_by_slot); > } > > -- > 2.5.0
I've tested this. It's a good fix. Please take it.
-- Jake Oshins
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