Ping.
Any comment is appreciate.
Thanks
Minfei
On 11/27/15 at 04:37pm, Minfei Huang wrote:
> From: Minfei Huang <mnfhu...@gmail.com>
>
> It might be more reasonable to cleanup all of the allocations in same
> function, if there is a fatal. Thus we can make function more
> independency to export it.
>
> For this patch, variant tag will be allocated in blk_mq_init_tags, and
> it will be freed in same function, if there is an error during
> initializing the tag.
>
> What the blk_mq_init_bitmap_tags does is to allocate bitmap.
>
> Signed-off-by: Minfei Huang <mnfhu...@gmail.com>
> ---
> block/blk-mq-tag.c | 30 ++++++++++++++++++------------
> 1 file changed, 18 insertions(+), 12 deletions(-)
>
> diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
> index a07ca34..7a1d9a8 100644
> --- a/block/blk-mq-tag.c
> +++ b/block/blk-mq-tag.c
> @@ -596,23 +596,24 @@ static void bt_free(struct blk_mq_bitmap_tags *bt)
> kfree(bt->bs);
> }
>
> -static struct blk_mq_tags *blk_mq_init_bitmap_tags(struct blk_mq_tags *tags,
> - int node, int alloc_policy)
> +static int blk_mq_init_bitmap_tags(struct blk_mq_tags *tags,
> + int node, int alloc_policy)
> {
> + int ret = 0;
> unsigned int depth = tags->nr_tags - tags->nr_reserved_tags;
>
> tags->alloc_policy = alloc_policy;
>
> - if (bt_alloc(&tags->bitmap_tags, depth, node, false))
> - goto enomem;
> - if (bt_alloc(&tags->breserved_tags, tags->nr_reserved_tags, node, true))
> - goto enomem;
> + ret = bt_alloc(&tags->bitmap_tags, depth, node, false);
> + if (ret)
> + goto out;
>
> - return tags;
> -enomem:
> - bt_free(&tags->bitmap_tags);
> - kfree(tags);
> - return NULL;
> + ret = bt_alloc(&tags->breserved_tags,
> + tags->nr_reserved_tags, node, true);
> + if (ret)
> + bt_free(&tags->bitmap_tags);
> +out:
> + return ret;
> }
>
> struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags,
> @@ -638,7 +639,12 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int
> total_tags,
> tags->nr_tags = total_tags;
> tags->nr_reserved_tags = reserved_tags;
>
> - return blk_mq_init_bitmap_tags(tags, node, alloc_policy);
> + if (blk_mq_init_bitmap_tags(tags, node, alloc_policy)) {
> + kfree(tags);
> + return NULL;
> + }
> +
> + return tags;
> }
>
> void blk_mq_free_tags(struct blk_mq_tags *tags)
> --
> 1.8.3.1
>
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