[PATCH v1 3/5] vpci: introduce map_bars()

[Stewart Hildebrand <stewart.hildebrand@xxxxxxx>]

Move some logic to a new function to enable code reuse.

Signed-off-by: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>
---
 xen/drivers/vpci/header.c | 56 ++++++++++++++++++++++++---------------
 1 file changed, 35 insertions(+), 21 deletions(-)

diff --git a/xen/drivers/vpci/header.c b/xen/drivers/vpci/header.c
index c1463d2ce076..b09ccc5e6be6 100644
--- a/xen/drivers/vpci/header.c
+++ b/xen/drivers/vpci/header.c
@@ -173,11 +173,38 @@ static void modify_decoding(const struct pci_dev *pdev, 
uint16_t cmd,
         ASSERT_UNREACHABLE();
 }
 
+static int map_bars(struct vpci_header *header, struct domain *d, bool map)
+{
+    unsigned int i;
+
+    for ( i = 0; i < ARRAY_SIZE(header->bars); i++ )
+    {
+        struct vpci_bar *bar = &header->bars[i];
+        struct map_data data = {
+            .d = d,
+            .map = map,
+            .bar = bar,
+        };
+        int rc;
+
+        if ( rangeset_is_empty(bar->mem) )
+            continue;
+
+        rc = rangeset_consume_ranges(bar->mem, map_range, &data);
+
+        if ( rc )
+            return rc;
+    }
+
+    return 0;
+}
+
 bool vpci_process_pending(struct vcpu *v)
 {
     const struct pci_dev *pdev = v->vpci.pdev;
     struct vpci_header *header = NULL;
     unsigned int i;
+    int rc;
 
     if ( !pdev )
         return false;
@@ -192,30 +219,17 @@ bool vpci_process_pending(struct vcpu *v)
     }
 
     header = &pdev->vpci->header;
-    for ( i = 0; i < ARRAY_SIZE(header->bars); i++ )
-    {
-        struct vpci_bar *bar = &header->bars[i];
-        struct map_data data = {
-            .d = v->domain,
-            .map = v->vpci.cmd & PCI_COMMAND_MEMORY,
-            .bar = bar,
-        };
-        int rc;
-
-        if ( rangeset_is_empty(bar->mem) )
-            continue;
+    rc = map_bars(header, v->domain, v->vpci.cmd & PCI_COMMAND_MEMORY);
 
-        rc = rangeset_consume_ranges(bar->mem, map_range, &data);
+    if ( rc == -ERESTART )
+    {
+        read_unlock(&v->domain->pci_lock);
+        return true;
+    }
 
-        if ( rc == -ERESTART )
-        {
-            read_unlock(&v->domain->pci_lock);
-            return true;
-        }
+    if ( rc )
+        goto fail;
 
-        if ( rc )
-            goto fail;
-    }
     v->vpci.pdev = NULL;
 
     spin_lock(&pdev->vpci->lock);
-- 
2.49.0