On Wed, 2020-09-02 at 15:17 +0800, lixiaokeng wrote:
> In dm_mapname, dm_task_get_name(dmt) has been called and the return
> value
> has been stored in map. Use map instead of second  dm_task_get_name.
> 
> Signed-off-by: Lixiaokeng <lixiaok...@huawei.com>
> Signed-off-by: Zhiqiang Liu <liuzhiqian...@huawei.com>
> Signed-off-by: Linfeilong <linfeil...@huawei.com>
> ---
>  libmultipath/devmapper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libmultipath/devmapper.c b/libmultipath/devmapper.c
> index cc2de1df..b4d77cb6 100644
> --- a/libmultipath/devmapper.c
> +++ b/libmultipath/devmapper.c
> @@ -1315,7 +1315,7 @@ dm_mapname(int major, int minor)
> 
>       map = dm_task_get_name(dmt);
>       if (map && strlen(map))
> -             response = STRDUP((const char *)dm_task_get_name(dmt));
> +             response = STRDUP((const char *)map);

dm_task_get_name() is not an expensive call. Anyway:

Reviewed-by: Martin Wilck <mwi...@suse.com>

> 
>       dm_task_destroy(dmt);
>       return response;


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