bnx2x: fix pci device refcount leak in bnx2x_vf_is_pcie_pending()

As comment of pci_get_domain_bus_and_slot() says, it returns
a pci device with refcount increment, when finish using it,
the caller must decrement the reference count by calling
pci_dev_put(). Call pci_dev_put() before returning from
bnx2x_vf_is_pcie_pending() to avoid refcount leak.

Fixes: b56e9670ffa4 ("bnx2x: Prepare device and initialize VF database")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20221119070202.1407648-1-yangyingliang@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
index 11d15cd..77d4cb4 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
@@ -795,16 +795,20 @@ static void bnx2x_vf_enable_traffic(struct bnx2x *bp, struct bnx2x_virtf *vf)
 
 static u8 bnx2x_vf_is_pcie_pending(struct bnx2x *bp, u8 abs_vfid)
 {
-       struct pci_dev *dev;
        struct bnx2x_virtf *vf = bnx2x_vf_by_abs_fid(bp, abs_vfid);
+       struct pci_dev *dev;
+       bool pending;
 
        if (!vf)
                return false;
 
        dev = pci_get_domain_bus_and_slot(vf->domain, vf->bus, vf->devfn);
-       if (dev)
-               return bnx2x_is_pcie_pending(dev);
-       return false;
+       if (!dev)
+               return false;
+       pending = bnx2x_is_pcie_pending(dev);
+       pci_dev_put(dev);
+
+       return pending;
 }
 
 int bnx2x_vf_flr_clnup_epilog(struct bnx2x *bp, u8 abs_vfid)