Re: [PATCH v2 07/10] blktrace: move debugfs file creation to its own function

[Bart Van Assche]

On 4/19/20 12:45 PM, Luis Chamberlain wrote:
> +static int blk_trace_create_debugfs_files(struct blk_user_trace_setup *buts,
> +					  struct dentry *dir,
> +					  struct blk_trace *bt)
> +{
> +	int ret = -EIO;
> +
> +	bt->dropped_file = debugfs_create_file("dropped", 0444, dir, bt,
> +					       &blk_dropped_fops);
> +
> +	bt->msg_file = debugfs_create_file("msg", 0222, dir, bt, &blk_msg_fops);
> +
> +	bt->rchan = relay_open("trace", dir, buts->buf_size,
> +				buts->buf_nr, &blk_relay_callbacks, bt);
> +	if (!bt->rchan)
> +		return ret;
> +
> +	return 0;
> +}

How about adding IS_ERR() checks for the debugfs_create_file() return 
values?

Thanks,

Bart.