[PATCH 2/2] mtd: ubi: block: wire-up device parent

Daniel Golle
2022-12-22T19:34:30Z

ubiblock devices were previously only identifyable by their name, but
not connected to their parent UBI volume device e.g. in sysfs.
Properly parent ubiblock device as descendant of a UBI volume device
to reflect device model hierachy.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/mtd/ubi/block.c | 2 +-
drivers/mtd/ubi/kapi.c | 1 +
include/linux/mtd/ubi.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index d725215ae66e5..e99b29ba48dc4 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -455,7 +455,7 @@ int ubiblock_create(struct ubi_volume_info *vi)
list_add_tail(&dev->list, &ubiblock_devices);

/* Must be the last step: anyone can call file ops from now on */
- ret = add_disk(dev->gd);
+ ret = device_add_disk(vi->dev, dev->gd, NULL);
if (ret)
goto out_destroy_wq;

diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index 0fce99ff29b58..5db653eacbd45 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -79,6 +79,7 @@ void ubi_do_get_volume_info(struct ubi_device *ubi, struct ubi_volume *vol,
vi->name_len = vol->name_len;
vi->name = vol->name;
vi->cdev = vol->cdev.dev;
+ vi->dev = &vol->dev;
}

/**
diff --git a/include/linux/mtd/ubi.h b/include/linux/mtd/ubi.h
index 7d48ea368c5e5..a529347fd75b2 100644
--- a/include/linux/mtd/ubi.h
+++ b/include/linux/mtd/ubi.h
@@ -110,6 +110,7 @@ struct ubi_volume_info {
int name_len;
const char *name;
dev_t cdev;
+ struct device *dev;
};

/**
--
2.39.0