patch "usb-storage: Add support for FL_ALWAYS_SYNC flag in the UAS driver" added to usb-testing

patch "usb-storage: Add support for FL_ALWAYS_SYNC flag in the UAS driver" added to usb-testing

[gregkh]

This is a note to let you know that I've just added the patch titled

    usb-storage: Add support for FL_ALWAYS_SYNC flag in the UAS driver

to my usb git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-testing branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will be merged to the usb-next branch sometime soon,
after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.


>From 8c4e97ddfe73a0958bb0abf7e6a3bc4cc3e04936 Mon Sep 17 00:00:00 2001
From: Alexander Kappner <agk@godking.net>
Date: Fri, 18 May 2018 21:50:15 -0700
Subject: usb-storage: Add support for FL_ALWAYS_SYNC flag in the UAS driver

The ALWAYS_SYNC flag is currently honored by the usb-storage driver but not UAS
and is required to work around devices that become unstable upon being
queried for cache. This code is taken straight from:
drivers/usb/storage/scsiglue.c:284

Signed-off-by: Alexander Kappner <agk@godking.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Acked-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/storage/uas.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 6034c39b67d1..9e9de5452860 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -836,6 +836,12 @@ static int uas_slave_configure(struct scsi_device *sdev)
 	if (devinfo->flags & US_FL_BROKEN_FUA)
 		sdev->broken_fua = 1;
 
+	/* UAS also needs to support FL_ALWAYS_SYNC */
+	if (devinfo->flags & US_FL_ALWAYS_SYNC) {
+		sdev->skip_ms_page_3f = 1;
+		sdev->skip_ms_page_8 = 1;
+		sdev->wce_default_on = 1;
+	}
 	scsi_change_queue_depth(sdev, devinfo->qdepth - 2);
 	return 0;
 }
-- 
2.17.0