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; }