linux-kernel - Re: [PATCH] rsxx: fix discard with length smaller than hw blksize

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Message-ID: <53B1D146.1060606@kernel.dk>
Date:	Mon, 30 Jun 2014 15:06:14 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>,
	pjk1939@...ux.vnet.ibm.com
CC:	josh.h.morris@...ibm.com, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] rsxx: fix discard with length smaller than hw blksize

On 2014-06-30 11:31, Thadeu Lima de Souza Cascardo wrote:
> When the discard length is not a multiple of RSXX_HW_BLK_SIZE, the
> discard code will get into an infinite loop, even discarding data it is
> not supposed to. This will also hang the system.
>
> This can be reproduced by doing an ioctl BLKDISCARD to /dev/rsxx0 with
> range from 0 to 1024.

That is a bug that should be fixed in the discard code, not worked 
around in the driver.


-- 
Jens Axboe

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