Initial commit

target/linux/generic/backport-6.6/410-v6.13-03-block-introduce-add_disk_fwnode.patch

@@ -0,0 +1,94 @@
+From e5f587242b6072ffab4f4a084a459a59f3035873 Mon Sep 17 00:00:00 2001
+From: Christian Marangi <ansuelsmth@gmail.com>
+Date: Thu, 3 Oct 2024 00:11:43 +0200
+Subject: [PATCH 3/5] block: introduce add_disk_fwnode()
+
+Introduce add_disk_fwnode() as a replacement of device_add_disk() that
+permits to pass and attach a fwnode to disk dev.
+
+This variant can be useful for eMMC that might have the partition table
+for the disk defined in DT. A parser can later make use of the attached
+fwnode to parse the related table and init the hardcoded partition for
+the disk.
+
+device_add_disk() is converted to a simple wrapper of add_disk_fwnode()
+with the fwnode entry set as NULL.
+
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+Reviewed-by: Christoph Hellwig <hch@lst.de>
+Link: https://lore.kernel.org/r/20241002221306.4403-4-ansuelsmth@gmail.com
+Signed-off-by: Jens Axboe <axboe@kernel.dk>
+---
+ block/genhd.c          | 28 ++++++++++++++++++++++++----
+ include/linux/blkdev.h |  3 +++
+ 2 files changed, 27 insertions(+), 4 deletions(-)
+
+--- a/block/genhd.c
++++ b/block/genhd.c
+@@ -383,16 +383,18 @@ int disk_scan_partitions(struct gendisk
+ }
+ 
+ /**
+- * device_add_disk - add disk information to kernel list
++ * add_disk_fwnode - add disk information to kernel list with fwnode
+  * @parent: parent device for the disk
+  * @disk: per-device partitioning information
+  * @groups: Additional per-device sysfs groups
++ * @fwnode: attached disk fwnode
+  *
+  * This function registers the partitioning information in @disk
+- * with the kernel.
++ * with the kernel. Also attach a fwnode to the disk device.
+  */
+-int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
+-				 const struct attribute_group **groups)
++int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk,
++				 const struct attribute_group **groups,
++				 struct fwnode_handle *fwnode)
+ 
+ {
+ 	struct device *ddev = disk_to_dev(disk);
+@@ -451,6 +453,8 @@ int __must_check device_add_disk(struct
+ 	ddev->parent = parent;
+ 	ddev->groups = groups;
+ 	dev_set_name(ddev, "%s", disk->disk_name);
++	if (fwnode)
++		device_set_node(ddev, fwnode);
+ 	if (!(disk->flags & GENHD_FL_HIDDEN))
+ 		ddev->devt = MKDEV(disk->major, disk->first_minor);
+ 	ret = device_add(ddev);
+@@ -552,6 +556,22 @@ out_exit_elevator:
+ 		elevator_exit(disk->queue);
+ 	return ret;
+ }
++EXPORT_SYMBOL_GPL(add_disk_fwnode);
++
++/**
++ * device_add_disk - add disk information to kernel list
++ * @parent: parent device for the disk
++ * @disk: per-device partitioning information
++ * @groups: Additional per-device sysfs groups
++ *
++ * This function registers the partitioning information in @disk
++ * with the kernel.
++ */
++int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
++				 const struct attribute_group **groups)
++{
++	return add_disk_fwnode(parent, disk, groups, NULL);
++}
+ EXPORT_SYMBOL(device_add_disk);
+ 
+ static void blk_report_disk_dead(struct gendisk *disk, bool surprise)
+--- a/include/linux/blkdev.h
++++ b/include/linux/blkdev.h
+@@ -741,6 +741,9 @@ static inline unsigned int blk_queue_dep
+ #define for_each_bio(_bio)		\
+ 	for (; _bio; _bio = _bio->bi_next)
+ 
++int __must_check add_disk_fwnode(struct device *parent, struct gendisk *disk,
++				 const struct attribute_group **groups,
++				 struct fwnode_handle *fwnode);
+ int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
+ 				 const struct attribute_group **groups);
+ static inline int __must_check add_disk(struct gendisk *disk)