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Subject[PATCH v3, part2 04/20] PCI, IOV: hold a reference to PCI bus when creating virtual PCI devices
Date
Also use new iterator to walk PCI devices of a PCI bus.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
---
drivers/pci/iov.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 5eb8165..4b796d6 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -36,19 +36,17 @@ static struct pci_bus *virtfn_add_bus(struct pci_bus *bus, int busnr)
struct pci_bus *child;

if (bus->number == busnr)
- return bus;
+ return pci_bus_get(bus);

- child = pci_find_bus(pci_domain_nr(bus), busnr);
+ child = pci_get_bus(pci_domain_nr(bus), busnr);
if (child)
return child;

child = pci_add_new_bus(bus, NULL, busnr);
- if (!child)
- return NULL;
-
- pci_bus_insert_busn_res(child, busnr, busnr);
+ if (child)
+ pci_bus_insert_busn_res(child, busnr, busnr);

- return child;
+ return pci_bus_get(child);
}

static void virtfn_remove_bus(struct pci_bus *physbus, struct pci_bus *virtbus)
@@ -113,6 +111,7 @@ static int virtfn_add(struct pci_dev *dev, int id, int reset)
goto failed2;

kobject_uevent(&virtfn->dev.kobj, KOBJ_CHANGE);
+ pci_bus_put(bus);

return 0;

@@ -125,6 +124,7 @@ failed1:
virtfn_remove_bus(dev->bus, bus);
failed0:
mutex_unlock(&iov->dev->sriov->lock);
+ pci_bus_put(bus);

return rc;
}
--
1.8.1.2


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