Re: Alternate ways to do Scatter-Gather from BOT Class driver

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On Mon, 28 Jun 2010, Subs wrote:

> Hi All,
> 
> In my class driver I am receiving data transfer buffer as number of
> Scatter-Gather lists from SCSI layer to perform data transfers.
> 
> Is there any alternate way to get the transfer buffer from SCSI other
> than SG. I wanted to receive the complete data transfer buffer as a
> single pointer.

As far as I know, there is no alternate way to get the transfer buffer 
from the SCSI layer.

However you can get the effect you want by setting the sg_tablesize 
field in your scsi_host_template to 1.

Just out of curiosity, why are you writing a class driver for the BOT 
class?  Aren't the two existing drivers in the kernel good enough?

Alan Stern

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