about a linux sata driver hotplug error

about a linux sata driver hotplug error

[mayl]

Hello:

    I have a Marvell 5081 sata disk card ,and get driver code from
Marvell.The driver work like a scsi driver,but can not work well in
hotplug operation. My OS kernel is Linux 2.6.12
    When I look up the code , I find that when a disk is pluged,driver 's
operation as follows:
    1 schedule a work to system work queue ,the work include :
       call scsi_add_device() to add a new scsi device to system
    2 call scsi_unblock_requests() to this scsi host in a timer callback.

 Because step 1 is a  queued work,and step 2 is a timer callback
fuction,the working sequences is not stable. If step2 works earlyer than
step1, scsi_unblock_requests cannot found a new disk pluged ,and make an
error.

   So I make an modify at the driver code ,use a sharing value to make
sure that step 2 must work after step1.But in this case,the function
scsi_add_device cannot complete.

    Could you tell me how to use the scsi functions in a driver ,and make a
security hotplug fuction?

                    Thanks alot


                             Yili Ma






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Re: about a linux sata driver hotplug error

[Greg KH]

On Wed, May 10, 2006 at 02:41:13PM +0800, mayl@ict.ac.cn wrote:
> Hello:
> 
>     I have a Marvell 5081 sata disk card ,and get driver code from
> Marvell.

Then please contact Marvell, as we have no idea what the code looks like
or is doing, so there's nothing we can really do to help you out,
unfortunatly.

Good luck,

greg k-h



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