mtd: fix bdev exclusive open bugs in block2mtd::add_device()

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There are two bdev exclusive open bugs.

* open_bdev_exclusive() must not be called with NULL holder.  Use dev
  as the holder.

* open_by_devnum() doesn't open the bdev exclusively but
  block2mtd_free_device() always assumes it.  Explicitly claim the
  bdev.

The latter is rather clumsy but will be simplified with future
blkdev_get/put() cleanups.

- Updated to use local variable @mode to cache FMODE_* masks as
  suggested by Artem Bityutskiy.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: linux-mtd@lists.infradead.org
Cc: Artem Bityutskiy <dedekind1@gmail.com>

...

This commit is contained in:

Tejun Heo 2010-11-13 11:55:16 +01:00

parent f6614b7bb4

commit 731edacb75

1 changed files with 11 additions and 2 deletions

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drivers/mtd/devices/block2mtd.c

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