linux-kernel - Re: [PATCH] partitions/efi: treat size mismatch as a warning, not an error

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Message-ID: <20131011095139.GA24613@x2.net.home>
Date:	Fri, 11 Oct 2013 11:51:39 +0200
From:	Karel Zak <kzak@...hat.com>
To:	Doug Anderson <dianders@...omium.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jens Axboe <axboe@...nel.dk>,
	Matt Fleming <matt.fleming@...el.com>,
	Sean Paul <seanpaul@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Bill Richardson <wfrichar@...omium.org>,
	Josh Triplett <josh@...htriplett.org>,
	Davidlohr Bueso <davidlohr@...com>
Subject: Re: [PATCH] partitions/efi: treat size mismatch as a warning, not an
 error

On Thu, Oct 10, 2013 at 04:28:22PM -0700, Doug Anderson wrote:
> +	 *
> +	 * Consider a bad value here to be a warning to support dd-ing
> +	 * an image from a smaller disk to a bigger disk.
>  	 */
>  	if (ret == GPT_MBR_PROTECTIVE) {
>  		sz = le32_to_cpu(mbr->partition_record[part].size_in_lba);
>  		if (sz != (uint32_t) total_sectors - 1 && sz != 0xFFFFFFFF)
> -			ret = 0;
> +			pr_warn("%s: mbr size mismatch (%u != %u)\n", __func__,
> +				sz, (uint32_t)((uint32_t) total_sectors - 1));
>  	}

 I did the same change to util-linux v2.24 fdisk, so you can use the fdisk
 to update your protective MBR and boot without warnings.

    Karel

-- 
 Karel Zak  <kzak@...hat.com>
 http://karelzak.blogspot.com
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