Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b6b76ba466bbd47397efad0fdaeaa5ebf7d462c7
Commit:     b6b76ba466bbd47397efad0fdaeaa5ebf7d462c7
Parent:     d1f3dd6cc00f5bf744118fb2820ecdf09a1f4b73
Author:     Artem Bityutskiy <[EMAIL PROTECTED]>
AuthorDate: Wed Dec 26 13:46:46 2007 +0200
Committer:  Artem Bityutskiy <[EMAIL PROTECTED]>
CommitDate: Wed Dec 26 19:15:17 2007 +0200

    UBI: add mtd_num sysfs attribute
    
    Expose number or the underlying MTD device in sysfs.
    
    Signed-off-by: Artem Bityutskiy <[EMAIL PROTECTED]>
---
 drivers/mtd/ubi/build.c |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 0ed8105..5098e6d 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -122,6 +122,8 @@ static struct device_attribute dev_min_io_size =
        __ATTR(min_io_size, S_IRUGO, dev_attribute_show, NULL);
 static struct device_attribute dev_bgt_enabled =
        __ATTR(bgt_enabled, S_IRUGO, dev_attribute_show, NULL);
+static struct device_attribute dev_mtd_num =
+       __ATTR(mtd_num, S_IRUGO, dev_attribute_show, NULL);
 
 /**
  * ubi_get_device - get UBI device.
@@ -257,8 +259,10 @@ static ssize_t dev_attribute_show(struct device *dev,
                ret = sprintf(buf, "%d\n", ubi->min_io_size);
        else if (attr == &dev_bgt_enabled)
                ret = sprintf(buf, "%d\n", ubi->thread_enabled);
+       else if (attr == &dev_mtd_num)
+               ret = sprintf(buf, "%d\n", ubi->mtd->index);
        else
-               BUG();
+               ret = -EINVAL;
 
        ubi_put_device(ubi);
        return ret;
@@ -314,6 +318,9 @@ static int ubi_sysfs_init(struct ubi_device *ubi)
        if (err)
                return err;
        err = device_create_file(&ubi->dev, &dev_bgt_enabled);
+       if (err)
+               return err;
+       err = device_create_file(&ubi->dev, &dev_mtd_num);
        return err;
 }
 
@@ -323,6 +330,7 @@ static int ubi_sysfs_init(struct ubi_device *ubi)
  */
 static void ubi_sysfs_close(struct ubi_device *ubi)
 {
+       device_remove_file(&ubi->dev, &dev_mtd_num);
        device_remove_file(&ubi->dev, &dev_bgt_enabled);
        device_remove_file(&ubi->dev, &dev_min_io_size);
        device_remove_file(&ubi->dev, &dev_max_vol_count);
-
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