2020-10-24 19:14:16 +00:00
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From: Gabor Juhos <juhosg@openwrt.org>
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Subject: kernel/3.1[02]: move MTD root device setup code to mtdcore
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The current code only allows to automatically set
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root device on MTD partitions. Move the code to MTD
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core to allow to use it with all MTD devices.
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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
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---
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drivers/mtd/mtdcore.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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--- a/drivers/mtd/mtdcore.c
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+++ b/drivers/mtd/mtdcore.c
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@@ -27,6 +27,7 @@
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#include <linux/reboot.h>
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#include <linux/leds.h>
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#include <linux/debugfs.h>
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+#include <linux/root_dev.h>
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#include <linux/nvmem-provider.h>
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#include <linux/mtd/mtd.h>
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2021-04-10 15:00:57 +00:00
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@@ -694,6 +695,19 @@ int add_mtd_device(struct mtd_info *mtd)
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2020-10-24 19:14:16 +00:00
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of this try_ nonsense, and no bitching about it
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either. :) */
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__module_get(THIS_MODULE);
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+
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+ if (!strcmp(mtd->name, "rootfs") &&
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+ IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) &&
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+ ROOT_DEV == 0) {
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2021-04-10 15:00:57 +00:00
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+ unsigned int index = mtd->index;
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2020-10-24 19:14:16 +00:00
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+ pr_notice("mtd: device %d (%s) set to be root filesystem\n",
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+ mtd->index, mtd->name);
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2021-04-10 15:00:57 +00:00
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+#ifdef CONFIG_FIT_PARTITION
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+ index <<= 1;
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+#endif
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+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index);
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2020-10-24 19:14:16 +00:00
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+ }
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+
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return 0;
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fail_nvmem_add:
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