[PATCH 3/6] fwu: v1: do a version check for the metadata

[Sughosh Ganu]

Do a sanity check that the version of the FWU metadata that has been
read aligns with the version enabled in the image. This allows to
indicate an early failure as part of the FWU module initialisation.

Signed-off-by: Sughosh Ganu <sughosh.g...@linaro.org>
---
 lib/fwu_updates/fwu_v1.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/fwu_updates/fwu_v1.c b/lib/fwu_updates/fwu_v1.c
index efb8d51500..023e43728d 100644
--- a/lib/fwu_updates/fwu_v1.c
+++ b/lib/fwu_updates/fwu_v1.c
@@ -146,6 +146,7 @@ int fwu_init(void)
 {
        int ret;
        uint32_t mdata_size;
+       struct fwu_mdata mdata = {0};
 
        fwu_get_mdata_size(&mdata_size);
 
@@ -157,10 +158,16 @@ int fwu_init(void)
         * Now read the entire structure, both copies, and
         * validate that the copies.
         */
-       ret = fwu_get_mdata(NULL);
+       ret = fwu_get_mdata(&mdata);
        if (ret)
                return ret;
 
+       if (mdata.version != 0x1) {
+               log_err("FWU metadata version %u. Expected value of %u\n",
+                       mdata.version, FWU_MDATA_VERSION);
+               return -EINVAL;
+       }
+
        fwu_data_init();
 
        return 0;
-- 
2.34.1