The only way to reproduce this is to keep hot plugging drives. To speed it up 
once in a while remove the drive before the detection completes.

> On Oct 16, 2013, at 7:42 PM, "xiangliang yu" <yxlr...@gmail.com> wrote:
> 
> Hi,
> 
> >Subject: Re: [PATCH 3/3] Fix device detection issues with mvsas driver
> 
> >Hi Xiang, Can you please take a look at the attached patch and ack it?
> >     /* cleanup and prepare the allocated FIS index */
> >     memset( SATA_RECEIVED_D2H_FIS(mvi_dev->taskfileset), 0, 
> >                             sizeof(struct dev_to_host_fis) );
> 
> According to spec, the FIS memory don't need to be cleared by software.
> can you tell me how to reproduce the issue? thanks!
> 
> 
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