[openwrt/openwrt] kernel: split out mtd hack for CONFIG_FIT_PARTITION + rootfs

[LEDE Commits]

rmilecki pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/6a64eb2664c13bc7d6800747066603c27fcad8e0

commit 6a64eb2664c13bc7d6800747066603c27fcad8e0
Author: Rafał Miłecki <rafal at milecki.pl>
AuthorDate: Mon Nov 7 23:39:52 2022 +0100

    kernel: split out mtd hack for CONFIG_FIT_PARTITION + rootfs
    
    This is some hack on top of our old hack. Use separated patch for it so
    it's easier to understand and actually possible to describe. We should
    ideally get rid of this (and we actually did with kernels 5.15+).
    
    Signed-off-by: Rafał Miłecki <rafal at milecki.pl>
---
 .../hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch |  5 +----
 ...squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch | 19 +++++++++++++++++++
 ...td-parsers-add-nvmem-support-to-cmdlinepart.patch} |  0
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch b/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch
index fa3b175dcf..a70d8af4c2 100644
--- a/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch
+++ b/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch
@@ -20,7 +20,7 @@ Signed-off-by: Gabor Juhos <juhosg at openwrt.org>
  #include <linux/nvmem-provider.h>
  
  #include <linux/mtd/mtd.h>
-@@ -759,6 +760,19 @@ int add_mtd_device(struct mtd_info *mtd)
+@@ -759,6 +760,16 @@ int add_mtd_device(struct mtd_info *mtd)
  	   of this try_ nonsense, and no bitching about it
  	   either. :) */
  	__module_get(THIS_MODULE);
@@ -31,9 +31,6 @@ Signed-off-by: Gabor Juhos <juhosg at openwrt.org>
 +		unsigned int index = mtd->index;
 +		pr_notice("mtd: device %d (%s) set to be root filesystem\n",
 +			  mtd->index, mtd->name);
-+#ifdef CONFIG_FIT_PARTITION
-+		index <<= 2;
-+#endif
 +		ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index);
 +	}
 +
diff --git a/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch b/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch
new file mode 100644
index 0000000000..2f7da2aaba
--- /dev/null
+++ b/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch
@@ -0,0 +1,19 @@
+From: Felix Fietkau <nbd at nbd.name>
+Date: Sat Apr 10 17:00:57 2021 +0200
+Subject: [PATCH] mtd: fix squashfs root on targets with CONFIG_FIT_PARTITION
+
+Fix assumption about the block device index
+---
+
+--- a/drivers/mtd/mtdcore.c
++++ b/drivers/mtd/mtdcore.c
+@@ -767,6 +767,9 @@ int add_mtd_device(struct mtd_info *mtd)
+ 		unsigned int index = mtd->index;
+ 		pr_notice("mtd: device %d (%s) set to be root filesystem\n",
+ 			  mtd->index, mtd->name);
++#ifdef CONFIG_FIT_PARTITION
++		index <<= 2;
++#endif
+ 		ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index);
+ 	}
+ 
diff --git a/target/linux/generic/hack-5.10/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch b/target/linux/generic/hack-5.10/422-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch
similarity index 100%
rename from target/linux/generic/hack-5.10/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch
rename to target/linux/generic/hack-5.10/422-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch