[PATCH 3/3] xen/pci: Add missing vpci handler cleanup

[Bertrand Marquis <bertrand.marquis@xxxxxxx>]

Add missing vpci handlers cleanup during pci_device_remove and in case
of error with iommu during pci_device_add.

Add empty static inline for vpci_remove_device when CONFIG_VPCI is not
defined.

Fixes: d59168dc05 ("xen/arm: Enable the existing x86 virtual PCI support
for ARM")
Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx>
---
 xen/drivers/passthrough/pci.c | 2 ++
 xen/include/xen/vpci.h        | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index d7e09448d1..ddf08a3fae 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -766,6 +766,7 @@ int pci_add_device(u16 seg, u8 bus, u8 devfn,
         ret = iommu_add_device(pdev);
         if ( ret )
         {
+            vpci_remove_device(pdev);
             pdev->domain = NULL;
             goto out;
         }
@@ -813,6 +814,7 @@ int pci_remove_device(u16 seg, u8 bus, u8 devfn)
     list_for_each_entry ( pdev, &pseg->alldevs_list, alldevs_list )
         if ( pdev->bus == bus && pdev->devfn == devfn )
         {
+            vpci_remove_device(pdev);
             pci_cleanup_msi(pdev);
             ret = iommu_remove_device(pdev);
             if ( pdev->domain )
diff --git a/xen/include/xen/vpci.h b/xen/include/xen/vpci.h
index 6746c2589a..9ea66e033f 100644
--- a/xen/include/xen/vpci.h
+++ b/xen/include/xen/vpci.h
@@ -230,6 +230,8 @@ static inline int vpci_add_handlers(struct pci_dev *pdev)
     return 0;
 }
 
+static inline void vpci_remove_device(struct pci_dev *pdev) { }
+
 static inline void vpci_dump_msi(void) { }
 
 static inline uint32_t vpci_read(pci_sbdf_t sbdf, unsigned int reg,
-- 
2.25.1