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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>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Jake Oshins <jakeo@microsoft.com>
This commit is contained in:
Cathy Avery 2016-07-12 11:31:24 -04:00 committed by Bjorn Helgaas
parent 837d741ea2
commit 0c6e617f65
1 changed files with 8 additions and 6 deletions
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14
drivers/pci/host/pci-hyperv.c
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@ -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);
}