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[PATCH 3.19.y-ckt 36/66] USB: uas: Add a new NO_REPORT_LUNS quirk

From Kamal Mostafa <kamal@canonical.com>
Newsgroups linux.kernel
Subject [PATCH 3.19.y-ckt 36/66] USB: uas: Add a new NO_REPORT_LUNS quirk
Date 2016-04-26 22:40 +0200
Message-ID <rshW3-5I2-31@gated-at.bofh.it> (permalink)
References <rshMl-5Dx-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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3.19.8-ckt20 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Hans de Goede <hdegoede@redhat.com>

commit 1363074667a6b7d0507527742ccd7bbed5e3ceaa upstream.

Add a new NO_REPORT_LUNS quirk and set it for Seagate drives with
an usb-id of: 0bc2:331a, as these will fail to respond to a
REPORT_LUNS command.

Reported-and-tested-by: David Webb <djw@noc.ac.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 Documentation/kernel-parameters.txt |  2 ++
 drivers/usb/storage/uas.c           | 14 +++++++++++++-
 drivers/usb/storage/unusual_uas.h   |  7 +++++++
 drivers/usb/storage/usb.c           |  5 ++++-
 include/linux/usb_usual.h           |  2 ++
 5 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c7e8f40..acb49c0 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3724,6 +3724,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 					sector if the number is odd);
 				i = IGNORE_DEVICE (don't bind to this
 					device);
+				j = NO_REPORT_LUNS (don't use report luns
+					command, uas only);
 				l = NOT_LOCKABLE (don't try to lock and
 					unlock ejectable media);
 				m = MAX_SECTORS_64 (don't transfer more
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 637ee77..546bb2b 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -2,7 +2,7 @@
  * USB Attached SCSI
  * Note that this is not the same as the USB Mass Storage driver
  *
- * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2014
+ * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2016
  * Copyright Matthew Wilcox for Intel Corp, 2010
  * Copyright Sarah Sharp for Intel Corp, 2010
  *
@@ -757,6 +757,17 @@ static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
 	return SUCCESS;
 }
 
+static int uas_target_alloc(struct scsi_target *starget)
+{
+	struct uas_dev_info *devinfo = (struct uas_dev_info *)
+			dev_to_shost(starget->dev.parent)->hostdata;
+
+	if (devinfo->flags & US_FL_NO_REPORT_LUNS)
+		starget->no_report_luns = 1;
+
+	return 0;
+}
+
 static int uas_slave_alloc(struct scsi_device *sdev)
 {
 	struct uas_dev_info *devinfo =
@@ -808,6 +819,7 @@ static struct scsi_host_template uas_host_template = {
 	.module = THIS_MODULE,
 	.name = "uas",
 	.queuecommand = uas_queuecommand,
+	.target_alloc = uas_target_alloc,
 	.slave_alloc = uas_slave_alloc,
 	.slave_configure = uas_slave_configure,
 	.eh_abort_handler = uas_eh_abort_handler,
diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h
index ccc113e..53341a7 100644
--- a/drivers/usb/storage/unusual_uas.h
+++ b/drivers/usb/storage/unusual_uas.h
@@ -64,6 +64,13 @@ UNUSUAL_DEV(0x0bc2, 0x3312, 0x0000, 0x9999,
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_NO_ATA_1X),
 
+/* Reported-by: David Webb <djw@noc.ac.uk> */
+UNUSUAL_DEV(0x0bc2, 0x331a, 0x0000, 0x9999,
+		"Seagate",
+		"Expansion Desk",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_NO_REPORT_LUNS),
+
 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */
 UNUSUAL_DEV(0x0bc2, 0x3320, 0x0000, 0x9999,
 		"Seagate",
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 9c5eb04..e1a6f49 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -480,7 +480,7 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags)
 			US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 |
 			US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE |
 			US_FL_NO_ATA_1X | US_FL_NO_REPORT_OPCODES |
-			US_FL_MAX_SECTORS_240);
+			US_FL_MAX_SECTORS_240 | US_FL_NO_REPORT_LUNS);
 
 	p = quirks;
 	while (*p) {
@@ -530,6 +530,9 @@ void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags)
 		case 'i':
 			f |= US_FL_IGNORE_DEVICE;
 			break;
+		case 'j':
+			f |= US_FL_NO_REPORT_LUNS;
+			break;
 		case 'l':
 			f |= US_FL_NOT_LOCKABLE;
 			break;
diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h
index 7f5f78b..245f57d 100644
--- a/include/linux/usb_usual.h
+++ b/include/linux/usb_usual.h
@@ -79,6 +79,8 @@
 		/* Cannot handle MI_REPORT_SUPPORTED_OPERATION_CODES */	\
 	US_FLAG(MAX_SECTORS_240,	0x08000000)		\
 		/* Sets max_sectors to 240 */			\
+	US_FLAG(NO_REPORT_LUNS,	0x10000000)			\
+		/* Cannot handle REPORT_LUNS */			\
 
 #define US_FLAG(name, value)	US_FL_##name = value ,
 enum { US_DO_ALL_FLAGS };
-- 
2.7.4

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