tools: Correct error handling in fit_image_process_hash()

We should not be returning -1 as an error code. This can mask a situation
where we run out of space adding things to the FIT. By returning the correct
error in this case (-ENOSPC) it can be handled by the higher-level code.

This may fix the error reported by Tom Van Deun here:

https://www.mail-archive.com/u-boot@lists.denx.de/msg217417.html

although I am not sure as I cannot actually repeat it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Tom Van Deun <tom.vandeun@wapice.com>
Reviewed-by: Teddy Reed <teddy.reed@gmail.com>

diff --git a/tools/image-host.c b/tools/image-host.c
index 7effb6c..3e14fdc 100644 (file)
--- a/tools/image-host.c
+++ b/tools/image-host.c
@@ -38,7 +38,7 @@ static int fit_set_hash_value(void *fit, int noffset, uint8_t *value,
                printf("Can't set hash '%s' property for '%s' node(%s)\n",
                       FIT_VALUE_PROP, fit_get_name(fit, noffset, NULL),
                       fdt_strerror(ret));
-               return -1;
+               return ret == -FDT_ERR_NOSPACE ? -ENOSPC : -EIO;
        }
 
        return 0;
@@ -64,25 +64,27 @@ static int fit_image_process_hash(void *fit, const char *image_name,
        const char *node_name;
        int value_len;
        char *algo;
+       int ret;
 
        node_name = fit_get_name(fit, noffset, NULL);
 
        if (fit_image_hash_get_algo(fit, noffset, &algo)) {
                printf("Can't get hash algo property for '%s' hash node in '%s' image node\n",
                       node_name, image_name);
-               return -1;
+               return -ENOENT;
        }
 
        if (calculate_hash(data, size, algo, value, &value_len)) {
                printf("Unsupported hash algorithm (%s) for '%s' hash node in '%s' image node\n",
                       algo, node_name, image_name);
-               return -1;
+               return -EPROTONOSUPPORT;
        }
 
-       if (fit_set_hash_value(fit, noffset, value, value_len)) {
+       ret = fit_set_hash_value(fit, noffset, value, value_len);
+       if (ret) {
                printf("Can't set hash value for '%s' hash node in '%s' image node\n",
                       node_name, image_name);
-               return -1;
+               return ret;
        }
 
        return 0;
@@ -322,7 +324,7 @@ int fit_image_add_verification_data(const char *keydir, void *keydest,
                                comment, require_keys);
                }
                if (ret)
-                       return -1;
+                       return ret;
        }
 
        return 0;