linux-kernel - Re: [PATCH] bcache: release the allocated id, not its multiple of BCACHE

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Date:   Fri, 23 Jun 2017 19:39:30 +0800
From:   Liang Chen <liangchen.linux@...il.com>
To:     tang.junhui@....com.cn
Cc:     bcache@...ux.ewheeler.net, colyli@...e.de,
        linux-bcache@...r.kernel.org, linux-bcache-owner@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bcache: release the allocated id, not its multiple of BCACHE_MINORS

Sure! I will find you there:)

On Fri, Jun 23, 2017 at 3:28 PM,  <tang.junhui@....com.cn> wrote:
> Hello Liang chen:
>
> Please see this patch:
>
> http://www.spinics.net/lists/linux-bcache/msg04572.html
>
> Do you have a wechat account? please add me: tangjunhui1984
>
> We can talk more about bcache.
>
> Thanks.
>
>
>
> 发件人:         Liang Chen <liangchen.linux@...il.com>
> 收件人:         linux-bcache@...r.kernel.org,
> 抄送:        linux-kernel@...r.kernel.org, colyli@...e.de,
> bcache@...ux.ewheeler.net, Liang Chen <liangchen.linux@...il.com>
> 日期:         2017/06/23 15:16
> 主题:        [PATCH] bcache: release the allocated id, not its multiple of
> BCACHE_MINORS
> 发件人:        linux-bcache-owner@...r.kernel.org
> ________________________________
>
>
>
> The id passed to ida_simple_remove has to be the one originally
> allocated with ida_simple_get, not the one after multipling by
> BCACHE_MINORS.
>
> Signed-off-by: Liang Chen <liangchen.linux@...il.com>
> ---
> drivers/md/bcache/super.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
> index e57353e..9f64477 100644
> --- a/drivers/md/bcache/super.c
> +++ b/drivers/md/bcache/super.c
> @@ -734,7 +734,8 @@ static void bcache_device_free(struct bcache_device *d)
>                  if (d->disk && d->disk->queue)
>                                   blk_cleanup_queue(d->disk->queue);
>                  if (d->disk) {
> -                                  ida_simple_remove(&bcache_minor,
> d->disk->first_minor);
> +                                  ida_simple_remove(&bcache_minor,
> +
> d->disk->first_minor / BCACHE_MINORS);
>                                   put_disk(d->disk);
>                  }
>
> @@ -784,7 +785,7 @@ static int bcache_device_init(struct bcache_device *d,
> unsigned block_size,
>
>                  if (!(d->bio_split = bioset_create(4, offsetof(struct bbio,
> bio))) ||
>                      !(d->disk = alloc_disk(BCACHE_MINORS))) {
> -                                  ida_simple_remove(&bcache_minor, minor);
> +                                  ida_simple_remove(&bcache_minor, minor /
> BCACHE_MINORS);
>                                   return -ENOMEM;
>                  }
>
> --
> 1.8.3.1
>
> --
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