From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Christie <michaelc@cs.wisc.edu>
Subject: Re: [PATCH] scsi_lib_dma.c : fix bug w/ dma maps on virtual fc ports
Date: Mon, 13 Oct 2008 13:37:23 -0500
Message-ID: <48F39563.4080003@cs.wisc.edu>
References: <1223386518.3082.9.camel@ogier>
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To: James.Smart@Emulex.Com
Cc: linux-scsi@vger.kernel.org

James Smart wrote:
>  
> +/*
> + * walks object list backward, to find the top-most shost object.
> + * Skips over transport objects that may be vports, shosts under
> vports, etc 
> + */
> +static inline struct Scsi_Host *dev_to_phys_shost(struct device *dev)
> +{
> +	struct Scsi_Host *shost_new = dev_to_shost(dev);
> +	struct Scsi_Host *shost = shost_new;
> +
> +	while (shost_new) {
> +		shost_new = dev_to_shost(shost->shost_gendev.parent);
> +		if (shost_new)
> +			shost = shost_new;
> +	}
> +	return shost;
> +}
> +

I think you will want to call this in __scsi_alloc_queue too.