From 0c6e617f656ec259162a41c0849e3a7557c99d95 Mon Sep 17 00:00:00 2001 From: Cathy Avery Date: Tue, 12 Jul 2016 11:31:24 -0400 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 Signed-off-by: Bjorn Helgaas Acked-by: Jake Oshins --- 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 7de341d7caaa..6955ffdb89f3 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); } -- 2.20.1