[PATCH v4 1/2] xen/arm: pci: modify pci_find_host_bridge_node argument to const pdev

[Rahul Singh <rahul.singh@xxxxxxx>]

Modify pci_find_host_bridge_node argument to const pdev to avoid
converting the dev to pdev in pci_find_host_bridge_node and also
constify the return.

Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
Changes in v4:
 - no changes
Changes in v3:
 - no changes
---
 xen/arch/arm/include/asm/pci.h     | 3 ++-
 xen/arch/arm/pci/pci-host-common.c | 4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/xen/arch/arm/include/asm/pci.h b/xen/arch/arm/include/asm/pci.h
index 7c7449d64f..80a2431804 100644
--- a/xen/arch/arm/include/asm/pci.h
+++ b/xen/arch/arm/include/asm/pci.h
@@ -106,7 +106,8 @@ bool pci_ecam_need_p2m_hwdom_mapping(struct domain *d,
                                      struct pci_host_bridge *bridge,
                                      uint64_t addr);
 struct pci_host_bridge *pci_find_host_bridge(uint16_t segment, uint8_t bus);
-struct dt_device_node *pci_find_host_bridge_node(struct device *dev);
+const struct dt_device_node *
+pci_find_host_bridge_node(const struct pci_dev *pdev);
 int pci_get_host_bridge_segment(const struct dt_device_node *node,
                                 uint16_t *segment);
 
diff --git a/xen/arch/arm/pci/pci-host-common.c 
b/xen/arch/arm/pci/pci-host-common.c
index fd8c0f837a..89ef30028e 100644
--- a/xen/arch/arm/pci/pci-host-common.c
+++ b/xen/arch/arm/pci/pci-host-common.c
@@ -243,10 +243,10 @@ err_exit:
 /*
  * Get host bridge node given a device attached to it.
  */
-struct dt_device_node *pci_find_host_bridge_node(struct device *dev)
+const struct dt_device_node *
+pci_find_host_bridge_node(const struct pci_dev *pdev)
 {
     struct pci_host_bridge *bridge;
-    struct pci_dev *pdev = dev_to_pci(dev);
 
     bridge = pci_find_host_bridge(pdev->seg, pdev->bus);
     if ( unlikely(!bridge) )
-- 
2.25.1