Re: [PATCH v3 01/10] block: clear ->slave_dir when dropping the main slave_dir reference

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On Tue, Nov 15 2022 at  9:10P -0500,
Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:

> From: Christoph Hellwig <hch@xxxxxx>
> 
> Zero out the pointer to ->slave_dir so that the holder code doesn't
> incorrectly treat the object as alive when add_disk failed or after
> del_gendisk was called.
> 
> Fixes: 89f871af1b26 ("dm: delay registering the gendisk")
> Reported-by: Yu Kuai <yukuai3@xxxxxxxxxx>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>

Reviewed-by: Mike Snitzer <snitzer@xxxxxxxxxx>

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