Re: [PATCH v3 4/8] mmc/core/block: add error handling support for add_disk()

[Ulf Hansson]

On Mon, 30 Aug 2021 at 23:26, Luis Chamberlain <mcgrof@xxxxxxxxxx> wrote:
>
> We never checked for errors on add_disk() as this function
> returned void. Now that this is fixed, use the shiny new
> error handling.
>
> The caller only cleanups the disk if we pass on an allocated md
> but on error we return return ERR_PTR(ret), and so we must do all
> the unwinding ourselves.
>
> Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>

Queued for v5.16 on the temporary devel branch, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/core/block.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> index 6a15fdf6e5f2..9b2856aa6231 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -2453,9 +2453,14 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
>         /* used in ->open, must be set before add_disk: */
>         if (area_type == MMC_BLK_DATA_AREA_MAIN)
>                 dev_set_drvdata(&card->dev, md);
> -       device_add_disk(md->parent, md->disk, mmc_disk_attr_groups);
> +       ret = device_add_disk(md->parent, md->disk, mmc_disk_attr_groups);
> +       if (ret)
> +               goto err_cleanup_queue;
>         return md;
>
> + err_cleanup_queue:
> +       blk_cleanup_queue(md->disk->queue);
> +       blk_mq_free_tag_set(&md->queue.tag_set);
>   err_kfree:
>         kfree(md);
>   out:
> --
> 2.30.2
>