Following code has a race window between pci_find_bus() and pci_get_slot()
if PCI hotplug operation happens between them which removes the pci_bus.
So use PCI hotplug safe interface pci_get_domain_bus_and_slot() instead,
which also reduces code complexity.
struct pci_bus *pci_bus = pci_find_bus(domain, busno);
struct pci_dev *pci_dev = pci_get_slot(pci_bus, devfn);
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
---
drivers/pci/iov.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index aeccc91..b0fe771 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -152,15 +152,11 @@ failed1:
static void virtfn_remove(struct pci_dev *dev, int id, int reset)
{
char buf[VIRTFN_ID_LEN];
- struct pci_bus *bus;
struct pci_dev *virtfn;
struct pci_sriov *iov = dev->sriov;
- bus = pci_find_bus(pci_domain_nr(dev->bus), virtfn_bus(dev, id));
- if (!bus)
- return;
-
- virtfn = pci_get_slot(bus, virtfn_devfn(dev, id));
+ virtfn = pci_get_domain_bus_and_slot(pci_domain_nr(dev->bus),
+ virtfn_bus(dev, id), virtfn_devfn(dev, id));
if (!virtfn)
return;
--
1.7.9.5
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