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Date: Tue, 19 Aug 2014 10:54:31 -0700
From: Christoph Hellwig <hch@infradead.org>
To: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: hare@suse.de, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org,
        ohering@suse.com, jbottomley@parallels.com, linux-scsi@vger.kernel.org,
        "Martin K. Petersen" <martin.petersen@oracle.com>
Subject: Re: [PATCH 2/2] Drivers: scsi: storvsc: Force discovery of LUNs that
 may have been removed.
Message-ID: <20140819175431.GA4617@infradead.org>
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On Sat, Aug 16, 2014 at 08:09:48PM -0700, K. Y. Srinivasan wrote:
> The host asks the guest to scan when a LUN is removed or added.
> The only way a guest can identify the removed LUN is when an I/O is
> attempted on a removed LUN - the SRB status code indicates that the LUN
> is invalid. We currently handle this SRB status and remove the device.
> 
> Rather than waiting for an I/O to remove the device, force the discovery of
> LUNs that may have been removed prior to discovering LUNs that may have
> been added.

This looks pretty reasonable to me, but I wonder if we should move this
up to common code so that it happens for any host rescan triggered by
sysfs or other drivers as well.