[PATCH v4 3/3] pci/iov: Expose VF drivers Auto Probe Globally

["Bryant G. Ly" <bryantly@xxxxxxxxxxxxxxxxxx>]

When SR-IOV is supported in pci_dev struct the
member variable drivers_autoprobe controls the
VF drivers auto probe functionality. This
patch exposes a gloabal function to be used
if needed when configuring the pci_dev sriov object.

Signed-off-by: Bryant G. Ly <bryantly@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Juan J. Alvarez <jjalvare@xxxxxxxxxxxxxxxxxx>
---
 arch/powerpc/platforms/pseries/pci.c |  2 ++
 drivers/pci/iov.c                    | 12 ++++++++++++
 include/linux/pci.h                  |  2 ++
 3 files changed, 16 insertions(+)

diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
index 14a90cf471cc..48d3af026f90 100644
--- a/arch/powerpc/platforms/pseries/pci.c
+++ b/arch/powerpc/platforms/pseries/pci.c
@@ -63,6 +63,7 @@ int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
 {
 	/* Allocate PCI data */
 	add_dev_pci_data(pdev);
+	pci_vf_drivers_autoprobe(pdev, false);
 	return 0;
 }
 
@@ -70,6 +71,7 @@ int pseries_pcibios_sriov_disable(struct pci_dev *pdev)
 {
 	/* Release PCI data */
 	remove_dev_pci_data(pdev);
+	pci_vf_drivers_autoprobe(pdev, true);
 	return 0;
 }
 #endif
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index ac41c8be9200..41465c06975c 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -634,6 +634,18 @@ void pci_restore_iov_state(struct pci_dev *dev)
 }
 
 /**
+ * pci_vf_drivers_autoprobe - set pf property drivers_autoprobe for vfs
+ * @dev: the PCI device
+ * @auto_probe: set vf drivers auto probe flag
+ */
+void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool auto_probe)
+{
+	if (dev->is_physfn)
+		dev->sriov->drivers_autoprobe = auto_probe;
+}
+EXPORT_SYMBOL_GPL(pci_vf_drivers_autoprobe);
+
+/**
  * pci_iov_bus_range - find bus range used by Virtual Function
  * @bus: the PCI bus
  *
diff --git a/include/linux/pci.h b/include/linux/pci.h
index f4f8ee5a7362..17a08554baa2 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1965,6 +1965,7 @@ int pci_vfs_assigned(struct pci_dev *dev);
 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
 int pci_sriov_get_totalvfs(struct pci_dev *dev);
 resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
+void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
 #else
 static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
 {
@@ -1992,6 +1993,7 @@ static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
 { return 0; }
 static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
 { return 0; }
+static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
 #endif
 
 #if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
-- 
2.13.5 (Apple Git-94)