From: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Date: Thu, 23 Apr 2020 12:11:11 +0000 (+0200)
Subject: device_tree: Allow name wildcards in qemu_fdt_node_path()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=80972d3bb2dbc6a47bae84b694c14acba9c1de64;p=qemu.git

device_tree: Allow name wildcards in qemu_fdt_node_path()

Allow name wildcards in qemu_fdt_node_path(). This is useful
to find all nodes with a given compatibility string.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20200423121114.4274-2-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---

diff --git a/device_tree.c b/device_tree.c
index bba6cc2164..f5b4699aed 100644
--- a/device_tree.c
+++ b/device_tree.c
@@ -308,7 +308,7 @@ char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
             offset = len;
             break;
         }
-        if (!strcmp(iter_name, name)) {
+        if (!name || !strcmp(iter_name, name)) {
             char *path;
 
             path = g_malloc(path_len);
diff --git a/include/sysemu/device_tree.h b/include/sysemu/device_tree.h
index c16fd69bc0..7c53ef7634 100644
--- a/include/sysemu/device_tree.h
+++ b/include/sysemu/device_tree.h
@@ -39,6 +39,9 @@ void *load_device_tree_from_sysfs(void);
  * NULL. If there is no error but no matching node was found, the
  * returned array contains a single element equal to NULL. If an error
  * was encountered when parsing the blob, the function returns NULL
+ *
+ * @name may be NULL to wildcard names and only match compatibility
+ * strings.
  */
 char **qemu_fdt_node_path(void *fdt, const char *name, char *compat,
                           Error **errp);