[PATCH 1/3] PCI/IOV: factor out sriov_add_vfs

[Sebastian Ott]

Provide sriov_add_vfs as a wrapper to scan for VFs that cleans up
after itself. This is just a code simplification. No functional change.

Signed-off-by: Sebastian Ott <seb...@linux.ibm.com>
Reviewed-by: Christoph Hellwig <h...@lst.de>
---
 drivers/pci/iov.c | 44 +++++++++++++++++++++++++++++++-------------
 1 file changed, 31 insertions(+), 13 deletions(-)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index 9616eca3182f..408db232a328 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -252,6 +252,24 @@ int __weak pcibios_sriov_disable(struct pci_dev *pdev)
        return 0;
 }
 
+static int sriov_add_vfs(struct pci_dev *dev, u16 num_vfs)
+{
+       unsigned int i;
+       int rc;
+
+       for (i = 0; i < num_vfs; i++) {
+               rc = pci_iov_add_virtfn(dev, i);
+               if (rc)
+                       goto failed;
+       }
+       return 0;
+failed:
+       while (i--)
+               pci_iov_remove_virtfn(dev, i);
+
+       return rc;
+}
+
 static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 {
        int rc;
@@ -337,21 +355,15 @@ static int sriov_enable(struct pci_dev *dev, int 
nr_virtfn)
        msleep(100);
        pci_cfg_access_unlock(dev);
 
-       for (i = 0; i < initial; i++) {
-               rc = pci_iov_add_virtfn(dev, i);
-               if (rc)
-                       goto failed;
-       }
+       rc = sriov_add_vfs(dev, initial);
+       if (rc)
+               goto err_pcibios;
 
        kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE);
        iov->num_VFs = nr_virtfn;
 
        return 0;
 
-failed:
-       while (i--)
-               pci_iov_remove_virtfn(dev, i);
-
 err_pcibios:
        iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
        pci_cfg_access_lock(dev);
@@ -368,17 +380,23 @@ static int sriov_enable(struct pci_dev *dev, int 
nr_virtfn)
        return rc;
 }
 
-static void sriov_disable(struct pci_dev *dev)
+static void sriov_del_vfs(struct pci_dev *dev)
 {
+       struct pci_sriov *iov = dev->sriov;
        int i;
+
+       for (i = 0; i < iov->num_VFs; i++)
+               pci_iov_remove_virtfn(dev, i);
+}
+
+static void sriov_disable(struct pci_dev *dev)
+{
        struct pci_sriov *iov = dev->sriov;
 
        if (!iov->num_VFs)
                return;
 
-       for (i = 0; i < iov->num_VFs; i++)
-               pci_iov_remove_virtfn(dev, i);
-
+       sriov_del_vfs(dev);
        iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
        pci_cfg_access_lock(dev);
        pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
-- 
2.13.4