uas: Add a quirk for rejecting ATA_12 and ATA_16 commands

And set this quirk for the Seagate Expansion Desk (0bc2:2312), as that one
seems to hang upon receiving an ATA_12 or ATA_16 command.

https://bugzilla.kernel.org/show_bug.cgi?id=79511
https://bbs.archlinux.org/viewtopic.php?id=183190

While at it also add missing documentation for the u value for usb-storage
quirks.

Cc: stable@vger.kernel.org # 3.16, 3.17
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

--
Changes in v2: Add documentation for new t and u usb-storage.quirks flags
Changes in v3: Fix typo in documentation
Changes in v4: Also apply the quirk to (0bc2:3312)
Changes in v5: Rebased on 3.17-rc5, drop u documentation, already upstream
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 31 insertions, 11 deletions

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 05b2d8e077d9..8c7d4a239f4c 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -28,6 +28,7 @@
 #include <scsi/scsi_tcq.h>
 
 #include "uas-detect.h"
+#include "scsiglue.h"
 
 /*
  * The r00-r01c specs define this version of the SENSE IU data structure.
@@ -49,6 +50,7 @@ struct uas_dev_info {
         struct usb_anchor cmd_urbs;
         struct usb_anchor sense_urbs;
         struct usb_anchor data_urbs;
+        unsigned long flags;
         int qdepth, resetting;
         struct response_iu response;
         unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe;
@@ -714,6 +716,15 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
 
         BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer));
 
+        if ((devinfo->flags & US_FL_NO_ATA_1X) &&
+                        (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) {
+                memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB,
+                       sizeof(usb_stor_sense_invalidCDB));
+                cmnd->result = SAM_STAT_CHECK_CONDITION;
+                cmnd->scsi_done(cmnd);
+                return 0;
+        }
+
         spin_lock_irqsave(&devinfo->lock, flags);
 
         if (devinfo->resetting) {
@@ -1080,6 +1091,8 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
         devinfo->resetting = 0;
         devinfo->running_task = 0;
         devinfo->shutdown = 0;
+        devinfo->flags = id->driver_info;
+        usb_stor_adjust_quirks(udev, &devinfo->flags);
         init_usb_anchor(&devinfo->cmd_urbs);
         init_usb_anchor(&devinfo->sense_urbs);
         init_usb_anchor(&devinfo->data_urbs);
diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h
index 7244444df8ee..3ff2dd4c78ca 100644
--- a/drivers/usb/storage/unusual_uas.h
+++ b/drivers/usb/storage/unusual_uas.h
@@ -40,13 +40,16 @@
  * and don't forget to CC: the USB development list <linux-usb@vger.kernel.org>
  */
 
-/*
- * This is an example entry for the US_FL_IGNORE_UAS flag. Once we have an
- * actual entry using US_FL_IGNORE_UAS this entry should be removed.
- *
- * UNUSUAL_DEV(  0xabcd, 0x1234, 0x0100, 0x0100,
- *              "Example",
- *              "Storage with broken UAS",
- *              USB_SC_DEVICE, USB_PR_DEVICE, NULL,
- *              US_FL_IGNORE_UAS),
- */
+/* https://bugzilla.kernel.org/show_bug.cgi?id=79511 */
+UNUSUAL_DEV(0x0bc2, 0x2312, 0x0000, 0x9999,
+                "Seagate",
+                "Expansion Desk",
+                USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+                US_FL_NO_ATA_1X),
+
+/* https://bbs.archlinux.org/viewtopic.php?id=183190 */
+UNUSUAL_DEV(0x0bc2, 0x3312, 0x0000, 0x9999,
+                "Seagate",
+                "Expansion Desk",
+                USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+                US_FL_NO_ATA_1X),
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index cedb29252a92..b9d1b9357287 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -478,7 +478,8 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags)
                         US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE |
                         US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT |
                         US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 |
-                        US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE);
+                        US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE |
+                        US_FL_NO_ATA_1X);
 
         p = quirks;
         while (*p) {
@@ -543,6 +544,9 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags)
                 case 's':
                         f |= US_FL_SINGLE_LUN;
                         break;
+                case 't':
+                        f |= US_FL_NO_ATA_1X;
+                        break;
                 case 'u':
                         f |= US_FL_IGNORE_UAS;
                         break;