linux-kernel - Re: [patch] cciss: Fix problem that deleting multiple logical drives could cause a panic

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Message-ID: <20081216202730.GZ32491@kernel.dk>
Date:	Tue, 16 Dec 2008 21:27:30 +0100
From:	Jens Axboe <jens.axboe@...cle.com>
To:	scameron@...rdog.cca.cpqcorp.net
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	mikem@...dking.cca.cpqcorp.net
Subject: Re: [patch] cciss: Fix problem that deleting multiple logical drives could cause a panic

On Tue, Dec 16 2008, scameron@...rdog.cca.cpqcorp.net wrote:
> 
> Fix problem that deleting multiple logical drives could cause a panic.

This looks like a 2.6.28 candidate, correct?

> 
> Signed-off-by: Stephen M. Cameron <scameron@...rdog.cca.cpqcorp.net>
> ---
> 
>  drivers/block/cciss.c |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff -puN drivers/block/cciss.c~fix_rebuild_lun_table_bug drivers/block/cciss.c
> --- linux-2.6.28-rc8/drivers/block/cciss.c~fix_rebuild_lun_table_bug	2008-12-16 14:00:52.000000000 -0600
> +++ linux-2.6.28-rc8-root/drivers/block/cciss.c	2008-12-16 14:00:52.000000000 -0600
> @@ -1693,6 +1693,11 @@ static int rebuild_lun_table(ctlr_info_t
>  	for (i = 0; i <= h->highest_lun; i++) {
>  		int j;
>  		drv_found = 0;
> +
> +		/* skip holes in the array from already deleted drives */
> +		if (h->drv[i].raid_level == -1)
> +			continue;
> +
>  		for (j = 0; j < num_luns; j++) {
>  			memcpy(&lunid, &ld_buff->LUN[j][0], 4);
>  			lunid = le32_to_cpu(lunid);
> _

-- 
Jens Axboe

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