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kernel: mtdsplit_uimage: return 0 if not fatal

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Introduced with Linux 6.7, in commit:
5c2f7727d437 ("mtd: mtdpart: check for subpartitions parsing result"),
when a parser returns an error, this will be passed up, and
consequently, all parent mtd partitions get torn down.

Adjust the mtdsplit_uimage driver to only return an error if there is a
critical problem in reading from the mtd device or allocating memory.
Otherwise return 0 to indicate that no partitions were found.
Also add logging to indicate what went wrong.

E.g. on Realtek devices that are booted for the first time through
initramfs with OpenWrt never installed before boot log will show

[    0.932985] Creating 8 MTD partitions on "spi0.0":
[    0.938412] 0x000000000000-0x000000080000 : "u-boot"
[    0.990151] 0x000000080000-0x0000000c0000 : "u-boot-env"
[    0.999907] 0x0000000c0000-0x000000100000 : "board-name"
[    1.019971] 0x000000100000-0x000000e80000 : "firmware"
[    1.051582] mtdsplit_uimage: no uImage found in "firmware"
[    1.069365] 0x000000e80000-0x000001000000 : "kernel2"
[    1.078959] 0x000001000000-0x000001040000 : "sysinfo"
[    1.099747] 0x000001040000-0x000001c40000 : "rootfs2"
[    1.119865] 0x000001c40000-0x000002000000 : "jffs2"

Similar issue was fixed before with commit ade045084b
("kernel: mtdsplit_minor: return 0 if not fatal")

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19016
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2025-06-04 03:19:40 -04:00 committed by Robert Marko
parent 53b87d660b
commit c78765213e
1 changed files with 2 additions and 2 deletions
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4
target/linux/generic/files/drivers/mtd/mtdsplit/mtdsplit_uimage.c
View file

@ -186,8 +186,8 @@ static int __mtdsplit_parse_uimage(struct mtd_info *master,
}
if (uimage_size == 0) {
pr_debug("no uImage found in \"%s\"\n", master->name);
ret = -ENODEV;
pr_info("no uImage found in \"%s\"\n", master->name);
ret = 0;
goto err_free_buf;
}