From: Daniel Golle <daniel@makrotopia.org>
Date: Sun, 4 Jun 2023 17:21:29 +0000 (+0100)
Subject: generic: use only first element in bootconf for uImage.FIT
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=07bca1adaa0de71d0aefcf83bff2e1d90616cd3d;p=openwrt%2Fstaging%2Frmilecki.git

generic: use only first element in bootconf for uImage.FIT

Now that it is possible to load several device tree overlays by
appending their config names to bootconf the uImage.FIT partition
parser need to discard everything after the first '#' character in
bootconf when looking up the config node to be used.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---

diff --git a/target/linux/generic/files/block/partitions/fit.c b/target/linux/generic/files/block/partitions/fit.c
index 13c03743f3d..91b25e0581e 100644
--- a/target/linux/generic/files/block/partitions/fit.c
+++ b/target/linux/generic/files/block/partitions/fit.c
@@ -84,13 +84,13 @@ int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector,
 	const u32 *image_offset_be, *image_len_be, *image_pos_be;
 	int ret = 1, node, images, config;
 	const char *image_name, *image_type, *image_description, *config_default,
-		*config_description, *config_loadables;
+		*config_description, *config_loadables, *bootconf_c;
 	int image_name_len, image_type_len, image_description_len, config_default_len,
-		config_description_len, config_loadables_len;
+		config_description_len, config_loadables_len, bootconf_len;
 	sector_t start_sect, nr_sects;
 	size_t label_min;
 	struct device_node *np = NULL;
-	const char *bootconf;
+	char *bootconf = NULL, *bootconf_term;
 	const char *loadable;
 	const char *select_rootfs = NULL;
 	bool found;
@@ -143,10 +143,17 @@ int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector,
 		return -ENOMEM;
 
 	np = of_find_node_by_path("/chosen");
-	if (np)
-		bootconf = of_get_property(np, "u-boot,bootconf", NULL);
-	else
-		bootconf = NULL;
+	if (np) {
+		bootconf_c = of_get_property(np, "u-boot,bootconf", &bootconf_len);
+		if (bootconf_c && bootconf_len)
+			bootconf = kmemdup_nul(bootconf_c, bootconf_len, GFP_KERNEL);
+	}
+
+	if (bootconf) {
+		bootconf_term = strchr(bootconf, '#');
+		if (bootconf_term)
+			*bootconf_term = '\0';
+	}
 
 	config = fdt_path_offset(fit, FIT_CONFS_PATH);
 	if (config < 0) {
@@ -285,6 +292,7 @@ int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector,
 		strlcat(state->pp_buf, tmp, PAGE_SIZE);
 	}
 ret_out:
+	kfree(bootconf);
 	kfree(fit);
 	return ret;
 }