[openwrt/openwrt] Revert "kernel: generic: mtdsplit_seil: return 0 instead of -ENODEV"

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/730b3872fe9fea36b2e3944b8e13223db25e4a98

commit 730b3872fe9fea36b2e3944b8e13223db25e4a98
Author: Christian Marangi <ansuelsmth at gmail.com>
AuthorDate: Thu Nov 20 23:18:08 2025 +0100

    Revert "kernel: generic: mtdsplit_seil: return 0 instead of -ENODEV"
    
    This reverts commit 5aab294726f35d8515945484cbee951655cdfe90.
    
    Skipping parser for subpartition will be handled now with -ENOENT.
    
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_seil.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_seil.c b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_seil.c
index 97bee9d268..e58bb49b23 100644
--- a/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_seil.c
+++ b/target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_seil.c
@@ -112,7 +112,7 @@ static int mtdsplit_parse_seil_fw(struct mtd_info *master,
 	u64 id;
 
 	if (!seil_bootdev_is_active(np))
-		return 0;
+		return -ENODEV;
 
 	ret = of_property_read_u64(np, "iij,seil-id", &id);
 	if (ret) {
@@ -137,7 +137,7 @@ static int mtdsplit_parse_seil_fw(struct mtd_info *master,
 	if (be64_to_cpu(header.id) != id ||
 	    be32_to_cpu(header.vfmt) != SEIL_VFMT) {
 		pr_debug("no valid seil image found in \"%s\"\n", master->name);
-		ret = 0;
+		ret = -ENODEV;
 		goto err_free_parts;
 	}
 
@@ -154,7 +154,7 @@ static int mtdsplit_parse_seil_fw(struct mtd_info *master,
 	if (ret || (master->size - rootfs_offset) == 0) {
 		pr_debug("no rootfs after seil image in \"%s\"\n",
 			 master->name);
-		ret = 0;
+		ret = -ENODEV;
 		goto err_free_parts;
 	}