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From:   Alexander Kappner <agk@godking.net>
To:     stern@rowland.harvard.edu
Cc:     gregkh@linuxfoundation.org, linux-usb@vger.kernel.org,
        usb-storage@lists.one-eyed-alien.net, linux-kernel@vger.kernel.org,
        Alexander Kappner <agk@godking.net>
Subject: [PATCH] usb-storage: Add quirks to make G-Technology "G-Drive" work 
Date:   Wed, 16 May 2018 13:01:20 -0700
Message-Id: <1526500880-26512-1-git-send-email-agk@godking.net>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The "G-Drive" (sold by G-Technology) external USB 3.0 drive
 hangs on write access under UAS:

[  136.079121] sd 15:0:0:0: [sdi] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  136.079144] sd 15:0:0:0: [sdi] tag#0 Sense Key : Illegal Request [current]
[  136.079152] sd 15:0:0:0: [sdi] tag#0 Add. Sense: Invalid field in cdb
[  136.079176] sd 15:0:0:0: [sdi] tag#0 CDB: Write(16) 8a 08 00 00 00 00 00 00 00 00 00 00 00 08 00 00
[  136.079180] print_req_error: critical target error, dev sdi, sector 0
[  136.079183] Buffer I/O error on dev sdi, logical block 0, lost sync page write
[  136.173148] EXT4-fs (sdi): mounted filesystem with ordered data mode. Opts: (null)
[  140.583998] sd 15:0:0:0: [sdi] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[  140.584010] sd 15:0:0:0: [sdi] tag#0 Sense Key : Illegal Request [current]
[  140.584016] sd 15:0:0:0: [sdi] tag#0 Add. Sense: Invalid field in cdb
[  140.584022] sd 15:0:0:0: [sdi] tag#0 CDB: Write(16) 8a 08 00 00 00 00 e8 c4 00 18 00 00 00 08 00 00
[  140.584025] print_req_error: critical target error, dev sdi, sector 3905159192
[  140.584044] print_req_error: critical target error, dev sdi, sector 3905159192
[  140.584052] Aborting journal on device sdi-8.

The proposed patch adds compatibility quirks. Because the drive requires two
quirks (one to disable UAS, and another to work with usb-storage), adding this
under unusual_devs.h and not unusual_uas.h so kernels compiled without UAS
receive the quirk. With the patch, the drive works reliably
(tested on NEC Corporation uPD720200 USB 3.0 host controller).

Signed-off-by: Alexander Kappner <agk@godking.net>
---
 drivers/usb/storage/unusual_devs.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index 747d3a9..b8661a1 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -2321,6 +2321,15 @@ UNUSUAL_DEV(  0x4146, 0xba01, 0x0100, 0x0100,
 		"Micro Mini 1GB",
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_NOT_LOCKABLE ),
 
+/* "G-DRIVE" external HDD hangs on write without these.
+ * Reported-by: Alexander Kappner <agk@godking.net>
+ */
+UNUSUAL_DEV(0x4971, 0x8024, 0x0000, 0x9999,
+		"SimpleTech",
+		"External HDD",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_IGNORE_UAS | US_FL_NO_WP_DETECT),
+
 /*
  * Nick Bowler <nbowler@elliptictech.com>
  * SCSI stack spams (otherwise harmless) error messages.
-- 
2.1.4