[OSS-Tools] [PATCH dt-utils 09/13] state: backend_storage: harmonize code with barebox

["Ulrich Ölmann" <u.oelmann@pengutronix.de>]

This ports the following barebox commit:

| commit f3895311ef49171b58b5ea1f06942408c8685a1e
| Author: Lucas Stach <l.stach@pengutronix.de>
| Date:   Fri Jul 22 15:00:19 2016 +0200
|
|     state: only build circular backend if MTD is enabled
|
|     The circular backend depends on MTD symbols and is only useful
|     if MTD is present. Exclude it from the build if MTD is not enabled.
|
|     Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
|     Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
---
 configure.ac                        | 2 ++
 src/barebox-state/backend_storage.c | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 04c2226625c1..30332620190d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,6 +41,8 @@ AS_IF([test "x${enable_state_backward_compatibility}" = "xyes"], [
         AC_DEFINE(CONFIG_STATE_BACKWARD_COMPATIBLE, [0])
 ])
 
+AC_DEFINE(CONFIG_MTD, [1], [Statically define to be enabled to harmonize barebox' & dt-utils' code base.])
+
 AC_CHECK_FUNCS([__secure_getenv secure_getenv])
 
 my_CFLAGS="-Wall \
diff --git a/src/barebox-state/backend_storage.c b/src/barebox-state/backend_storage.c
index 3879a8d35666..509427f16f1d 100644
--- a/src/barebox-state/backend_storage.c
+++ b/src/barebox-state/backend_storage.c
@@ -369,7 +369,7 @@ int state_storage_init(struct state *state, const char *path,
 		       const char *storagetype)
 {
 	struct state_backend_storage *storage = &state->storage;
-	int ret;
+	int ret = -ENODEV;
 	struct mtd_info_user meminfo;
 
 	INIT_LIST_HEAD(&storage->buckets);
@@ -380,7 +380,9 @@ int state_storage_init(struct state *state, const char *path,
 	storage->max_size = max_size;
 	storage->path = xstrdup(path);
 
-	ret = mtd_get_meminfo(path, &meminfo);
+	if (IS_ENABLED(CONFIG_MTD))
+		ret = mtd_get_meminfo(path, &meminfo);
+
 	if (!ret && !(meminfo.flags & MTD_NO_ERASE)) {
 		bool circular;
 		if (!storagetype || !strcmp(storagetype, "circular")) {
-- 
2.23.0


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