[PATCH 10/11] Drivers: add blist flags
Andy Whitcroft
apw at canonical.com
Wed Sep 24 09:00:46 UTC 2014
From: "K. Y. Srinivasan" <kys at microsoft.com>
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.
Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
Reviewed-by: Hannes Reinecke <hare at suse.de>
Signed-off-by: Christoph Hellwig <hch at lst.de>
(cherry picked from commit f3cfabce7a2e92564d380de3aad4b43901fb7ae6)
BugLink: http://bugs.launchpad.net/bugs/1354397
Signed-off-by: Andy Whitcroft <apw at canonical.com>
---
drivers/scsi/storvsc_drv.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index ed0f899..fecac5d0 100644
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -327,6 +327,8 @@ MODULE_PARM_DESC(storvsc_ringbuffer_size, "Ring buffer size (bytes)");
*/
static int storvsc_timeout = 180;
+static int msft_blist_flags = BLIST_TRY_VPD_PAGES;
+
#define STORVSC_MAX_IO_REQUESTS 200
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;
+
return 0;
}
--
1.9.1
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