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mtd: ubi: Add support for opening a volume by cdev 

Needed by ubifs support.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-07-24 16:07:06 +02:00
parent d9abbe8d01
commit 8fb48927da
4 changed files with 26 additions and 0 deletions
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6
drivers/mtd/ubi/cdev.c
View File

@ -5,6 +5,8 @@
#include "ubi-barebox.h"
#include "ubi.h"
LIST_HEAD(ubi_volumes_list);
struct ubi_volume_cdev_priv {
struct ubi_device *ubi;
struct ubi_volume *vol;
@ -184,6 +186,8 @@ int ubi_volume_cdev_add(struct ubi_device *ubi, struct ubi_volume *vol)
free(cdev->name);
}
list_add_tail(&vol->list, &ubi_volumes_list);
return 0;
}
@ -192,6 +196,8 @@ void ubi_volume_cdev_remove(struct ubi_volume *vol)
struct cdev *cdev = &vol->cdev;
struct ubi_volume_cdev_priv *priv = cdev->priv;
list_del(&vol->list);
devfs_remove(cdev);
kfree(cdev->name);
kfree(priv);

17
drivers/mtd/ubi/kapi.c
View File

@ -265,6 +265,23 @@ struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name,
}
EXPORT_SYMBOL_GPL(ubi_open_volume_nm);
extern struct list_head ubi_volumes_list;
struct ubi_volume_desc *ubi_open_volume_cdev(struct cdev *cdev, int mode)
{
struct ubi_volume *vol;
list_for_each_entry(vol, &ubi_volumes_list, list) {
if (cdev == &vol->cdev)
goto found;
}
return ERR_PTR(-ENOENT);
found:
return ubi_open_volume(vol->ubi->ubi_num, vol->vol_id, mode);
}
/**
* ubi_close_volume - close UBI volume.
* @desc: volume descriptor

2
drivers/mtd/ubi/ubi.h
View File

@ -322,6 +322,8 @@ struct ubi_volume {
unsigned int updating:1;
unsigned int changing_leb:1;
unsigned int direct_writes:1;
struct list_head list;
};
/**

1
include/linux/mtd/ubi.h
View File

@ -200,6 +200,7 @@ void ubi_get_volume_info(struct ubi_volume_desc *desc,
struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode);
struct ubi_volume_desc *ubi_open_volume_nm(int ubi_num, const char *name,
int mode);
struct ubi_volume_desc *ubi_open_volume_cdev(struct cdev *cdev, int mode);
struct ubi_volume_desc *ubi_open_volume_path(const char *pathname, int mode);
void ubi_close_volume(struct ubi_volume_desc *desc);