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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
Date: Mon, 7 Nov 2022 23:48:24 +0100
Subject: [PATCH] mtd: support OpenWrt's MTD_ROOTFS_ROOT_DEV
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This allows setting ROOT_DEV to MTD partition named "rootfs".
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -758,7 +758,8 @@ int add_mtd_device(struct mtd_info *mtd)
mutex_unlock(&mtd_table_mutex);
- if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL)) {
+ if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL) ||
+ (IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) && !strcmp(mtd->name, "rootfs") && ROOT_DEV == 0)) {
if (IS_BUILTIN(CONFIG_MTD)) {
pr_info("mtd: setting mtd%d (%s) as root device\n", mtd->index, mtd->name);
ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
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