linux-kernel - Re: [PATCHv2 1/7] block: check for valid bio while splitting

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Message-ID: <aJiusAtZ-CsnPTOR@infradead.org>
Date: Sun, 10 Aug 2025 07:37:36 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Keith Busch <kbusch@...a.com>
Cc: linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, snitzer@...nel.org, axboe@...nel.dk,
	dw@...idwei.uk, brauner@...nel.org, Keith Busch <kbusch@...nel.org>,
	Hannes Reinecke <hare@...e.de>
Subject: Re: [PATCHv2 1/7] block: check for valid bio while splitting

On Tue, Aug 05, 2025 at 07:11:17AM -0700, Keith Busch wrote:
> @@ -341,6 +344,8 @@ int bio_split_rw_at(struct bio *bio, const struct queue_limits *lim,
>  	 * we do not use the full hardware limits.
>  	 */
>  	bytes = ALIGN_DOWN(bytes, bio_split_alignment(bio, lim));
> +	if (!bytes)
> +		return -EINVAL;

How is this related to the other hunk and the patch description?