[xen staging] xen/arm: bootfdt: Make process_chosen_node() return int

[patchbot@xxxxxxx]

commit d0d81052b4e7493acf8c8dc18fe1911c4ee1d2ac
Author:     Henry Wang <Henry.Wang@xxxxxxx>
AuthorDate: Thu Sep 8 11:09:07 2022 +0000
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Thu Sep 8 12:23:39 2022 +0100

    xen/arm: bootfdt: Make process_chosen_node() return int
    
    At the boot time, it is saner to stop booting early if an error occurs
    when parsing the device tree chosen node, rather than seeing random
    behavior afterwards. Therefore, this commit changes the return type of
    the process_chosen_node() from void to int, and return correct errno
    based on the error type.
    
    Signed-off-by: Henry Wang <Henry.Wang@xxxxxxx>
    Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
    Acked-by: Julien Grall <jgrall@xxxxxxxxxx>
---
 xen/arch/arm/bootfdt.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c
index ec81a45de9..1a79b969af 100644
--- a/xen/arch/arm/bootfdt.c
+++ b/xen/arch/arm/bootfdt.c
@@ -293,9 +293,9 @@ static void __init process_multiboot_node(const void *fdt, 
int node,
                      kind, start, domU);
 }
 
-static void __init process_chosen_node(const void *fdt, int node,
-                                       const char *name,
-                                       u32 address_cells, u32 size_cells)
+static int __init process_chosen_node(const void *fdt, int node,
+                                      const char *name,
+                                      u32 address_cells, u32 size_cells)
 {
     const struct fdt_property *prop;
     paddr_t start, end;
@@ -306,11 +306,11 @@ static void __init process_chosen_node(const void *fdt, 
int node,
     prop = fdt_get_property(fdt, node, "linux,initrd-start", &len);
     if ( !prop )
         /* No initrd present. */
-        return;
+        return 0;
     if ( len != sizeof(u32) && len != sizeof(u64) )
     {
         printk("linux,initrd-start property has invalid length %d\n", len);
-        return;
+        return -EINVAL;
     }
     start = dt_read_number((void *)&prop->data, dt_size_to_cells(len));
 
@@ -318,12 +318,12 @@ static void __init process_chosen_node(const void *fdt, 
int node,
     if ( !prop )
     {
         printk("linux,initrd-end not present but -start was\n");
-        return;
+        return -EINVAL;
     }
     if ( len != sizeof(u32) && len != sizeof(u64) )
     {
         printk("linux,initrd-end property has invalid length %d\n", len);
-        return;
+        return -EINVAL;
     }
     end = dt_read_number((void *)&prop->data, dt_size_to_cells(len));
 
@@ -331,12 +331,14 @@ static void __init process_chosen_node(const void *fdt, 
int node,
     {
         printk("linux,initrd limits invalid: %"PRIpaddr" >= %"PRIpaddr"\n",
                   start, end);
-        return;
+        return -EINVAL;
     }
 
     printk("Initrd %"PRIpaddr"-%"PRIpaddr"\n", start, end);
 
     add_boot_module(BOOTMOD_RAMDISK, start, end-start, false);
+
+    return 0;
 }
 
 static int __init process_domain_node(const void *fdt, int node,
@@ -383,7 +385,7 @@ static int __init early_scan_node(const void *fdt,
               device_tree_node_compatible(fdt, node, "multiboot,module" )))
         process_multiboot_node(fdt, node, name, address_cells, size_cells);
     else if ( depth == 1 && device_tree_node_matches(fdt, node, "chosen") )
-        process_chosen_node(fdt, node, name, address_cells, size_cells);
+        rc = process_chosen_node(fdt, node, name, address_cells, size_cells);
     else if ( depth == 2 && device_tree_node_compatible(fdt, node, 
"xen,domain") )
         rc = process_domain_node(fdt, node, name, address_cells, size_cells);
 
--
generated by git-patchbot for /home/xen/git/xen.git#staging