linux-kernel - Re: [PATCH 1/1] Drivers: scsi: storvsc: Add blist flags

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Date:	Wed, 23 Jul 2014 15:10:28 +0100
From:	Sitsofe Wheeler <sitsofe@...il.com>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, ohering@...e.com, apw@...onical.com,
	jasowang@...hat.com, jbottomley@...allels.com, hch@...radead.org,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH 1/1] Drivers: scsi: storvsc: Add blist flags

On Mon, Jul 21, 2014 at 04:06:01PM -0700, K. Y. Srinivasan wrote:
> Add blist flags to permit the reading of the VPD pages even when
> the target may claim SPC-2 compliance. MSFT targets currently
> claim SPC-2 compliance while they implement post SPC-2 features.
> With this patch we can correctly handle WRITE_SAME_16 issues.
> 
>  static void storvsc_on_channel_callback(void *context);
> @@ -1449,6 +1451,14 @@ static int storvsc_device_configure(struct scsi_device *sdevice)
>  
>  	sdevice->no_write_same = 1;
>  
> +	/*
> +	 * Add blist flags to permit the reading of the VPD pages even when
> +	 * the target may claim SPC-2 compliance. MSFT targets currently
> +	 * claim SPC-2 compliance while they implement post SPC-2 features.
> +	 * With this patch we can correctly handle WRITE_SAME_16 issues.
> +	 */
> +	sdevice->sdev_bflags |= msft_blist_flags;
> +

I'm not sure this alone will work - won't sdev_bflags/bflags have
already been built at this point? If the setting of this has to stay in
this function why don't you (also) set sdevice->try_vpd_pages in a
similar way to no_write_same?

-- 
Sitsofe | http://sucs.org/~sits/
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