linux-kernel - Re: [PATCH -mm 11/11] aacraid: use pci_set_dma_max_seg

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Date:	Wed, 24 Oct 2007 07:31:30 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	FUJITA Tomonori <tomof@....org>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, James.Bottomley@...elEye.com,
	aacraid@...ptec.com, fujita.tomonori@....ntt.co.jp
Subject: Re: [PATCH -mm 11/11] aacraid: use pci_set_dma_max_seg_size

FUJITA Tomonori wrote:
> This sets the segment size limit properly via pci_set_dma_max_seg_size
> and remove blk_queue_max_segment_size because scsi-ml calls it.
> 
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> ---
>  drivers/scsi/aacraid/linit.c |    9 ++++++---
>  1 files changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
> index 038980b..04d6a65 100644
> --- a/drivers/scsi/aacraid/linit.c
> +++ b/drivers/scsi/aacraid/linit.c
> @@ -435,9 +435,6 @@ static int aac_slave_configure(struct scsi_device *sdev)
>  		else if (depth < 2)
>  			depth = 2;
>  		scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, depth);
> -		if (!(((struct aac_dev *)host->hostdata)->adapter_info.options &
> -				AAC_OPT_NEW_COMM))
> -			blk_queue_max_segment_size(sdev->request_queue, 65536);
>  	} else
>  		scsi_adjust_queue_depth(sdev, 0, 1);
>  
> @@ -1045,6 +1042,12 @@ static int __devinit aac_probe_one(struct pci_dev *pdev,
>  	if (error < 0)
>  		goto out_deinit;
>  
> +	if (!(aac->adapter_info.options & AAC_OPT_NEW_COMM)) {
> +		error = pci_set_dma_max_seg_size(pdev, 65536);
> +		if (error)
> +			goto out_deinit;
> +	}


is this needed, given that the default is already 65536?

	Jeff



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