From: Yang Yingliang <yangyingliang@xxxxxxxxxx>
commit b93fb4405fcb5112c5739c5349afb52ec7f15c07 upstream.
As the comment of pci_get_domain_bus_and_slot() says, it
returns a PCI device with refcount incremented, when finish
using it, the caller must decrement the reference count by
calling pci_dev_put().
In ixgbe_get_first_secondary_devfn() and ixgbe_x550em_a_has_mii(),
pci_dev_put() is called to avoid leak.
Fixes: 8fa10ef01260 ("ixgbe: register a mdiobus")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Tested-by: Gurucharan G <gurucharanx.g@xxxxxxxxx> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c
@@ -851,9 +851,11 @@ static struct pci_dev *ixgbe_get_first_s
rp_pdev = pci_get_domain_bus_and_slot(0, 0, devfn);
if (rp_pdev && rp_pdev->subordinate) {
bus = rp_pdev->subordinate->number;
+ pci_dev_put(rp_pdev);
return pci_get_domain_bus_and_slot(0, bus, 0);
}
+ pci_dev_put(rp_pdev);
return NULL;
}
@@ -870,6 +872,7 @@ static bool ixgbe_x550em_a_has_mii(struc
struct ixgbe_adapter *adapter = hw->back;
struct pci_dev *pdev = adapter->pdev;
struct pci_dev *func0_pdev;
+ bool has_mii = false;
/* For the C3000 family of SoCs (x550em_a) the internal ixgbe devices
* are always downstream of root ports @ 0000:00:16.0 & 0000:00:17.0
@@ -880,15 +883,16 @@ static bool ixgbe_x550em_a_has_mii(struc
func0_pdev = ixgbe_get_first_secondary_devfn(PCI_DEVFN(0x16, 0));
if (func0_pdev) {
if (func0_pdev == pdev)
- return true;
- else
- return false;
+ has_mii = true;
+ goto out;
}
func0_pdev = ixgbe_get_first_secondary_devfn(PCI_DEVFN(0x17, 0));
if (func0_pdev == pdev)
- return true;
+ has_mii = true;
- return false;
+out:
+ pci_dev_put(func0_pdev);
+ return has_mii;
}
/**
