[Xen-devel] [PATCH 1/5] ARM: ITS: Introduce common function add_to_host_its_list

[mjaggi@xxxxxxxxxxxxxxxxxx]

From: Manish Jaggi <mjaggi@xxxxxxxxxx>

add_to_host_its_list will update the host_its_list. This common function to
be invoked from gicv3_its_dt_init and gic_v3_its_acpi_init.

Signed-off-by: Manish Jaggi <mjaggi@xxxxxxxxxx>
---
 xen/arch/arm/gic-v3-its.c | 36 +++++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/xen/arch/arm/gic-v3-its.c b/xen/arch/arm/gic-v3-its.c
index 2d36030..f844a0d 100644
--- a/xen/arch/arm/gic-v3-its.c
+++ b/xen/arch/arm/gic-v3-its.c
@@ -976,12 +976,31 @@ int gicv3_its_make_hwdom_dt_nodes(const struct domain *d,
     return res;
 }
 
+/* Common function for adding to host_its_list */
+static int add_to_host_its_list(u64 addr, u64 size, const void *node)
+{
+    struct host_its *its_data;
+    its_data = xzalloc(struct host_its);
+
+    if ( !its_data )
+        return -1;
+
+    its_data->addr = addr;
+    its_data->size = size;
+    if ( node )
+        its_data->dt_node = node;
+
+    printk("GICv3: Found ITS @0x%lx\n", addr);
+
+    list_add_tail(&its_data->entry, &host_its_list);
+
+    return 0;
+}
+
 /* Scan the DT for any ITS nodes and create a list of host ITSes out of it. */
 void gicv3_its_dt_init(const struct dt_device_node *node)
 {
     const struct dt_device_node *its = NULL;
-    struct host_its *its_data;
-
     /*
      * Check for ITS MSI subnodes. If any, add the ITS register
      * frames to the ITS list.
@@ -996,17 +1015,8 @@ void gicv3_its_dt_init(const struct dt_device_node *node)
         if ( dt_device_get_address(its, 0, &addr, &size) )
             panic("GICv3: Cannot find a valid ITS frame address");
 
-        its_data = xzalloc(struct host_its);
-        if ( !its_data )
-            panic("GICv3: Cannot allocate memory for ITS frame");
-
-        its_data->addr = addr;
-        its_data->size = size;
-        its_data->dt_node = its;
-
-        printk("GICv3: Found ITS @0x%lx\n", addr);
-
-        list_add_tail(&its_data->entry, &host_its_list);
+        if ( add_to_host_its_list(addr, size, its) )
+            panic("GICV3: Adding Host ITS failed ");
     }
 }
 
-- 
2.7.4


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