Re: [PATCH v3] cachefiles: fix error return code in cachefiles_ondemand_copen()

[JeffleXu]

On 8/18/22 8:50 PM, Sun Ke wrote:
> The cache_size field of copen is specified by the user daemon.
> If cache_size < 0, then the OPEN request is expected to fail,
> while copen itself shall succeed. However, returning 0 is indeed
> unexpected when cache_size is an invalid error code.
> 
> Fix this by returning error when cache_size is an invalid error code.
> 
> Fixes: c8383054506c ("cachefiles: notify the user daemon when looking up cookie")
> Signed-off-by: Sun Ke <sunke32@xxxxxxxxxx>

LGTM.

Reviewed-by: Jingbo Xu <jefflexu@xxxxxxxxxxxxxxxxx>

> ---
> v3: update the commit log suggested by Jingbo.
> 
>  fs/cachefiles/ondemand.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/cachefiles/ondemand.c b/fs/cachefiles/ondemand.c
> index 1fee702d5529..ea8a1e8317d9 100644
> --- a/fs/cachefiles/ondemand.c
> +++ b/fs/cachefiles/ondemand.c
> @@ -159,7 +159,7 @@ int cachefiles_ondemand_copen(struct cachefiles_cache *cache, char *args)
>  	/* fail OPEN request if daemon reports an error */
>  	if (size < 0) {
>  		if (!IS_ERR_VALUE(size))
> -			size = -EINVAL;
> +			ret = size = -EINVAL;
>  		req->error = size;
>  		goto out;
>  	}

-- 
Thanks,
Jingbo