generic: 5.15: get uImage.FIT partition parser ready

Prepare uImage.FIT partition parser for Linux 5.15

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

target/linux/generic/files/block/partitions/fit.c

@@ -20,6 +20,7 @@
 #include <linux/of_device.h>
 #include <linux/of_fdt.h>
 #include <linux/libfdt.h>
+#include <linux/version.h>
 
 #include "check.h"
 
@@ -72,7 +73,12 @@
 
 int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector, u64 sectors, int *slot, int add_remain)
 {
-	struct address_space *mapping = state->bdev->bd_inode->i_mapping;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 11, 0)
+	struct block_device *bdev = state->disk->part0;
+#else
+	struct block_device *bdev = state->bdev;
+#endif
+	struct address_space *mapping = bdev->bd_inode->i_mapping;
 	struct page *page;
 	void *fit, *init_fit;
 	struct partition_meta_info *info;
@@ -107,7 +113,7 @@ int parse_fit_partitions(struct parsed_partitions *state, u64 fit_start_sector,
 		return 0;
 	}
 
-	dsectors = get_capacity(state->bdev->bd_disk);
+	dsectors = get_capacity(bdev->bd_disk);
 	if (sectors)
 		dsectors = (dsectors>sectors)?sectors:dsectors;
 

target/linux/generic/hack-5.15/401-mtd-super-don-t-reply-on-mtdblock-device-minor.patch

@@ -1,84 +0,0 @@
-From f9760b158f610b1792a222cc924073724c061bfb Mon Sep 17 00:00:00 2001
-From: Daniel Golle <daniel@makrotopia.org>
-Date: Wed, 7 Apr 2021 22:37:57 +0100
-Subject: [PATCH 1/2] mtd: super: don't reply on mtdblock device minor
-To: linux-mtd@lists.infradead.org
-Cc: Vignesh Raghavendra <vigneshr@ti.com>,
-    Richard Weinberger <richard@nod.at>,
-    Miquel Raynal <miquel.raynal@bootlin.com>,
-    David Woodhouse <dwmw2@infradead.org>
-
-For blktrans devices with partitions (ie. part_bits != 0) the
-assumption that the minor number of the mtdblock device matches
-the mtdnum doesn't hold true.
-Properly resolve mtd device from blktrans layer instead.
-
-Signed-off-by: Daniel Golle <daniel@makrotopia.org>
----
- drivers/mtd/mtdsuper.c | 33 ++++++++++++++++++++++++++-------
- 1 file changed, 26 insertions(+), 7 deletions(-)
-
---- a/drivers/mtd/mtdsuper.c
-+++ b/drivers/mtd/mtdsuper.c
-@@ -9,6 +9,7 @@
-  */
- 
- #include <linux/mtd/super.h>
-+#include <linux/mtd/blktrans.h>
- #include <linux/namei.h>
- #include <linux/export.h>
- #include <linux/ctype.h>
-@@ -120,8 +121,9 @@ int get_tree_mtd(struct fs_context *fc,
- 				struct fs_context *fc))
- {
- #ifdef CONFIG_BLOCK
--	dev_t dev;
--	int ret;
-+	struct mtd_blktrans_dev *blktrans_dev;
-+	struct block_device *bdev;
-+	int ret, part_bits;
- #endif
- 	int mtdnr;
- 
-@@ -169,16 +171,36 @@ int get_tree_mtd(struct fs_context *fc,
- 	/* try the old way - the hack where we allowed users to mount
- 	 * /dev/mtdblock$(n) but didn't actually _use_ the blockdev
- 	 */
--	ret = lookup_bdev(fc->source, &dev);
--	if (ret) {
-+	bdev = blkdev_get_by_path(fc->source, FMODE_READ, NULL);
-+	if (IS_ERR(bdev)) {
-+		ret = PTR_ERR(bdev);
- 		errorf(fc, "MTD: Couldn't look up '%s': %d", fc->source, ret);
- 		return ret;
- 	}
--	pr_debug("MTDSB: lookup_bdev() returned 0\n");
-+	pr_debug("MTDSB: blkdev_get_by_path() returned 0\n");
- 
--	if (MAJOR(dev) == MTD_BLOCK_MAJOR)
--		return mtd_get_sb_by_nr(fc, MINOR(dev), fill_super);
-+	if (MAJOR(bdev->bd_dev) == MTD_BLOCK_MAJOR) {
-+		if (!bdev->bd_disk) {
-+			blkdev_put(bdev, FMODE_READ);
-+			BUG();
-+			return -EINVAL;
-+		}
- 
-+		blktrans_dev = (struct mtd_blktrans_dev *)(bdev->bd_disk->private_data);
-+		if (!blktrans_dev || !blktrans_dev->tr) {
-+			blkdev_put(bdev, FMODE_READ);
-+			BUG();
-+			return -EINVAL;
-+		}
-+		mtdnr = blktrans_dev->devnum;
-+		part_bits = blktrans_dev->tr->part_bits;
-+		blkdev_put(bdev, FMODE_READ);
-+		if (MINOR(bdev->bd_dev) != (mtdnr << part_bits))
-+			return -EINVAL;
-+ 
-+		return mtd_get_sb_by_nr(fc, mtdnr, fill_super);
-+	}
-+	blkdev_put(bdev, FMODE_READ);
- #endif /* CONFIG_BLOCK */
- 
- 	if (!(fc->sb_flags & SB_SILENT))

target/linux/generic/hack-5.15/410-block-fit-partition-parser.patch

@@ -98,30 +98,6 @@
  	return true;
  }
  
---- a/drivers/mtd/ubi/block.c
-+++ b/drivers/mtd/ubi/block.c
-@@ -428,6 +428,9 @@ int ubiblock_create(struct ubi_volume_in
- 		goto out_cleanup_disk;
- 	}
- 	gd->private_data = dev;
-+#ifdef CONFIG_FIT_PARTITION
-+	gd->flags |= GENHD_FL_EXT_DEVT;
-+#endif
- 	sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
- 	set_capacity(gd, disk_capacity);
- 	dev->gd = gd;
---- a/drivers/mtd/mtd_blkdevs.c
-+++ b/drivers/mtd/mtd_blkdevs.c
-@@ -345,6 +345,9 @@ int add_mtd_blktrans_dev(struct mtd_blkt
- 	gd->first_minor = (new->devnum) << tr->part_bits;
- 	gd->minors = 1 << tr->part_bits;
- 	gd->fops = &mtd_block_ops;
-+#ifdef CONFIG_FIT_PARTITION
-+	gd->flags |= GENHD_FL_EXT_DEVT;
-+#endif
- 
- 	if (tr->part_bits)
- 		if (new->devnum < 26)
 --- a/block/partitions/efi.c
 +++ b/block/partitions/efi.c
 @@ -716,6 +716,9 @@ int efi_partition(struct parsed_partitio
@@ -184,6 +160,29 @@
  	{0, NULL},
  };
  
+--- a/drivers/mtd/mtd_blkdevs.c
++++ b/drivers/mtd/mtd_blkdevs.c
+@@ -345,6 +345,8 @@ int add_mtd_blktrans_dev(struct mtd_blkt
+ 	gd->first_minor = (new->devnum) << tr->part_bits;
+ 	gd->minors = 1 << tr->part_bits;
+ 	gd->fops = &mtd_block_ops;
++	if (IS_ENABLED(CONFIG_FIT_PARTITION) && !mtd_type_is_nand(new->mtd))
++		gd->flags |= GENHD_FL_EXT_DEVT;
+ 
+ 	if (tr->part_bits)
+ 		if (new->devnum < 26)
+--- a/drivers/mtd/ubi/block.c
++++ b/drivers/mtd/ubi/block.c
+@@ -428,6 +428,9 @@ int ubiblock_create(struct ubi_volume_in
+ 		goto out_cleanup_disk;
+ 	}
+ 	gd->private_data = dev;
++#ifdef CONFIG_FIT_PARTITION
++	gd->flags |= GENHD_FL_EXT_DEVT;
++#endif
+ 	sprintf(gd->disk_name, "ubiblock%d_%d", dev->ubi_num, dev->vol_id);
+ 	set_capacity(gd, disk_capacity);
+ 	dev->gd = gd;
 --- a/include/linux/msdos_partition.h
 +++ b/include/linux/msdos_partition.h
 @@ -31,6 +31,7 @@ enum msdos_sys_ind {