drivers/vfio: Enable VFIO if EEH is not supported

The existing vfio_pci_open() fails upon error returned from
vfio_spapr_pci_eeh_open(), which breaks POWER7's P5IOC2 PHB
support which this patch brings back.

The patch fixes the issue by dropping the return value of
vfio_spapr_pci_eeh_open().

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

3 files changed, 5 insertions, 10 deletions

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 1651c0769b72..f7825332a325 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -200,11 +200,7 @@ static int vfio_pci_open(void *device_data)
                 if (ret)
                         goto error;
 
-                ret = vfio_spapr_pci_eeh_open(vdev->pdev);
-                if (ret) {
-                        vfio_pci_disable(vdev);
-                        goto error;
-                }
+                vfio_spapr_pci_eeh_open(vdev->pdev);
         }
         vdev->refcnt++;
 error:
diff --git a/drivers/vfio/vfio_spapr_eeh.c b/drivers/vfio/vfio_spapr_eeh.c
index 4779cace8036..86dfceb9201f 100644
--- a/drivers/vfio/vfio_spapr_eeh.c
+++ b/drivers/vfio/vfio_spapr_eeh.c
@@ -19,9 +19,9 @@
 #define DRIVER_DESC     "VFIO IOMMU SPAPR EEH"
 
 /* We might build address mapping here for "fast" path later */
-int vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
+void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
 {
-        return eeh_dev_open(pdev);
+        eeh_dev_open(pdev);
 }
 EXPORT_SYMBOL_GPL(vfio_spapr_pci_eeh_open);
 
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 224128a96b7f..d3204115f15d 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -100,15 +100,14 @@ extern long vfio_external_check_extension(struct vfio_group *group,
 
 struct pci_dev;
 #ifdef CONFIG_EEH
-extern int vfio_spapr_pci_eeh_open(struct pci_dev *pdev);
+extern void vfio_spapr_pci_eeh_open(struct pci_dev *pdev);
 extern void vfio_spapr_pci_eeh_release(struct pci_dev *pdev);
 extern long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group,
                                        unsigned int cmd,
                                        unsigned long arg);
 #else
-static inline int vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
+static inline void vfio_spapr_pci_eeh_open(struct pci_dev *pdev)
 {
-        return 0;
 }
 
 static inline void vfio_spapr_pci_eeh_release(struct pci_dev *pdev)