Re: [PATCH 1/3] blk-iolatency: clear delay state when freeing policy data

On Thu, Aug 06, 2026 at 11:37:18AM -0700, Usama Arif wrote:
>  static void iolatency_pd_free(struct blkg_policy_data *pd)
>  {
> +	struct blkcg_gq *blkg = pd_to_blkg(pd);
> +
> +	/*
> +	 * Groups throttled as collateral have min_lat_nsec == 0, so
> +	 * iolatency_pd_offline() leaves their delay set.  Drop it here, where
> +	 * no in-flight bio can re-arm it via check_scale_change().
> +	 */
> +	if (blkg)

When can blkg be NULL here?

Thanks.

-- 
tejun