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932378aeb6
This DT property allows marking flash partition that Linux should use as
a root device. It's useful for devices that don't use U-Boot and cmdline
parser for partitioning. It may be used with "fixed-partitions" or some
dynamic partitioning based on flash content.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit d33e49857e)
32 lines
1023 B
Diff
32 lines
1023 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Sat Apr 10 17:00:57 2021 +0200
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Subject: [PATCH] mtd: fix squashfs root on targets with CONFIG_FIT_PARTITION
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Fix assumption about the block device index
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---
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--- a/drivers/mtd/mtdcore.c
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+++ b/drivers/mtd/mtdcore.c
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@@ -758,12 +758,18 @@ int add_mtd_device(struct mtd_info *mtd)
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if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL) ||
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(IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) && !strcmp(mtd->name, "rootfs") && ROOT_DEV == 0)) {
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+ unsigned int index = mtd->index;
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+
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+#ifdef CONFIG_FIT_PARTITION
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+ index <<= 2;
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+#endif
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+
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if (IS_BUILTIN(CONFIG_MTD)) {
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- pr_info("mtd: setting mtd%d (%s) as root device\n", mtd->index, mtd->name);
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- ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index);
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+ pr_info("mtd: setting mtd%d (%s) as root device\n", index, mtd->name);
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+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index);
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} else {
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pr_warn("mtd: can't set mtd%d (%s) as root device - mtd must be builtin\n",
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- mtd->index, mtd->name);
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+ index, mtd->name);
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}
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}
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