These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

11 files changed, 406 insertions, 445 deletions

diff --git a/kernel/include/scsi/scsi.h b/kernel/include/scsi/scsi.h
index d0a66aa18..e0a3398b1 100644
--- a/kernel/include/scsi/scsi.h
+++ b/kernel/include/scsi/scsi.h
@@ -1,9 +1,6 @@
 /*
  * This header file contains public constants and structures used by
- * the scsi code for linux.
- *
- * For documentation on the OPCODES, MESSAGES, and SENSE values,
- * please consult the SCSI standard.
+ * the SCSI initiator code.
  */
 #ifndef _SCSI_SCSI_H
 #define _SCSI_SCSI_H
@@ -11,6 +8,8 @@
 #include <linux/types.h>
 #include <linux/scatterlist.h>
 #include <linux/kernel.h>
+#include <scsi/scsi_common.h>
+#include <scsi/scsi_proto.h>
 
 struct scsi_cmnd;
 
@@ -49,187 +48,6 @@ enum scsi_timeouts {
  */
 #define SCAN_WILD_CARD	~0
 
-/*
- *      SCSI opcodes
- */
-
-#define TEST_UNIT_READY       0x00
-#define REZERO_UNIT           0x01
-#define REQUEST_SENSE         0x03
-#define FORMAT_UNIT           0x04
-#define READ_BLOCK_LIMITS     0x05
-#define REASSIGN_BLOCKS       0x07
-#define INITIALIZE_ELEMENT_STATUS 0x07
-#define READ_6                0x08
-#define WRITE_6               0x0a
-#define SEEK_6                0x0b
-#define READ_REVERSE          0x0f
-#define WRITE_FILEMARKS       0x10
-#define SPACE                 0x11
-#define INQUIRY               0x12
-#define RECOVER_BUFFERED_DATA 0x14
-#define MODE_SELECT           0x15
-#define RESERVE               0x16
-#define RELEASE               0x17
-#define COPY                  0x18
-#define ERASE                 0x19
-#define MODE_SENSE            0x1a
-#define START_STOP            0x1b
-#define RECEIVE_DIAGNOSTIC    0x1c
-#define SEND_DIAGNOSTIC       0x1d
-#define ALLOW_MEDIUM_REMOVAL  0x1e
-
-#define READ_FORMAT_CAPACITIES 0x23
-#define SET_WINDOW            0x24
-#define READ_CAPACITY         0x25
-#define READ_10               0x28
-#define WRITE_10              0x2a
-#define SEEK_10               0x2b
-#define POSITION_TO_ELEMENT   0x2b
-#define WRITE_VERIFY          0x2e
-#define VERIFY                0x2f
-#define SEARCH_HIGH           0x30
-#define SEARCH_EQUAL          0x31
-#define SEARCH_LOW            0x32
-#define SET_LIMITS            0x33
-#define PRE_FETCH             0x34
-#define READ_POSITION         0x34
-#define SYNCHRONIZE_CACHE     0x35
-#define LOCK_UNLOCK_CACHE     0x36
-#define READ_DEFECT_DATA      0x37
-#define MEDIUM_SCAN           0x38
-#define COMPARE               0x39
-#define COPY_VERIFY           0x3a
-#define WRITE_BUFFER          0x3b
-#define READ_BUFFER           0x3c
-#define UPDATE_BLOCK          0x3d
-#define READ_LONG             0x3e
-#define WRITE_LONG            0x3f
-#define CHANGE_DEFINITION     0x40
-#define WRITE_SAME            0x41
-#define UNMAP		      0x42
-#define READ_TOC              0x43
-#define READ_HEADER           0x44
-#define GET_EVENT_STATUS_NOTIFICATION 0x4a
-#define LOG_SELECT            0x4c
-#define LOG_SENSE             0x4d
-#define XDWRITEREAD_10        0x53
-#define MODE_SELECT_10        0x55
-#define RESERVE_10            0x56
-#define RELEASE_10            0x57
-#define MODE_SENSE_10         0x5a
-#define PERSISTENT_RESERVE_IN 0x5e
-#define PERSISTENT_RESERVE_OUT 0x5f
-#define VARIABLE_LENGTH_CMD   0x7f
-#define REPORT_LUNS           0xa0
-#define SECURITY_PROTOCOL_IN  0xa2
-#define MAINTENANCE_IN        0xa3
-#define MAINTENANCE_OUT       0xa4
-#define MOVE_MEDIUM           0xa5
-#define EXCHANGE_MEDIUM       0xa6
-#define READ_12               0xa8
-#define SERVICE_ACTION_OUT_12 0xa9
-#define WRITE_12              0xaa
-#define READ_MEDIA_SERIAL_NUMBER 0xab /* Obsolete with SPC-2 */
-#define SERVICE_ACTION_IN_12  0xab
-#define WRITE_VERIFY_12       0xae
-#define VERIFY_12	      0xaf
-#define SEARCH_HIGH_12        0xb0
-#define SEARCH_EQUAL_12       0xb1
-#define SEARCH_LOW_12         0xb2
-#define SECURITY_PROTOCOL_OUT 0xb5
-#define READ_ELEMENT_STATUS   0xb8
-#define SEND_VOLUME_TAG       0xb6
-#define WRITE_LONG_2          0xea
-#define EXTENDED_COPY         0x83
-#define RECEIVE_COPY_RESULTS  0x84
-#define ACCESS_CONTROL_IN     0x86
-#define ACCESS_CONTROL_OUT    0x87
-#define READ_16               0x88
-#define COMPARE_AND_WRITE     0x89
-#define WRITE_16              0x8a
-#define READ_ATTRIBUTE        0x8c
-#define WRITE_ATTRIBUTE	      0x8d
-#define VERIFY_16	      0x8f
-#define SYNCHRONIZE_CACHE_16  0x91
-#define WRITE_SAME_16	      0x93
-#define SERVICE_ACTION_BIDIRECTIONAL 0x9d
-#define SERVICE_ACTION_IN_16  0x9e
-#define SERVICE_ACTION_OUT_16 0x9f
-/* values for service action in */
-#define	SAI_READ_CAPACITY_16  0x10
-#define SAI_GET_LBA_STATUS    0x12
-#define SAI_REPORT_REFERRALS  0x13
-/* values for VARIABLE_LENGTH_CMD service action codes
- * see spc4r17 Section D.3.5, table D.7 and D.8 */
-#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
-/* values for maintenance in */
-#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
-#define MI_REPORT_TARGET_PGS  0x0a
-#define MI_REPORT_ALIASES     0x0b
-#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
-#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
-#define MI_REPORT_PRIORITY    0x0e
-#define MI_REPORT_TIMESTAMP   0x0f
-#define MI_MANAGEMENT_PROTOCOL_IN 0x10
-/* value for MI_REPORT_TARGET_PGS ext header */
-#define MI_EXT_HDR_PARAM_FMT  0x20
-/* values for maintenance out */
-#define MO_SET_IDENTIFYING_INFORMATION 0x06
-#define MO_SET_TARGET_PGS     0x0a
-#define MO_CHANGE_ALIASES     0x0b
-#define MO_SET_PRIORITY       0x0e
-#define MO_SET_TIMESTAMP      0x0f
-#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
-/* values for variable length command */
-#define XDREAD_32	      0x03
-#define XDWRITE_32	      0x04
-#define XPWRITE_32	      0x06
-#define XDWRITEREAD_32	      0x07
-#define READ_32		      0x09
-#define VERIFY_32	      0x0a
-#define WRITE_32	      0x0b
-#define WRITE_SAME_32	      0x0d
-
-/* Values for T10/04-262r7 */
-#define	ATA_16		      0x85	/* 16-byte pass-thru */
-#define	ATA_12		      0xa1	/* 12-byte pass-thru */
-
-/* Vendor specific CDBs start here */
-#define VENDOR_SPECIFIC_CDB 0xc0
-
-/*
- *	SCSI command lengths
- */
-
-#define SCSI_MAX_VARLEN_CDB_SIZE 260
-
-/* defined in T10 SCSI Primary Commands-2 (SPC2) */
-struct scsi_varlen_cdb_hdr {
-	__u8 opcode;        /* opcode always == VARIABLE_LENGTH_CMD */
-	__u8 control;
-	__u8 misc[5];
-	__u8 additional_cdb_length;         /* total cdb length - 8 */
-	__be16 service_action;
-	/* service specific data follows */
-};
-
-static inline unsigned
-scsi_varlen_cdb_length(const void *hdr)
-{
-	return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
-}
-
-extern const unsigned char scsi_command_size_tbl[8];
-#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
-
-static inline unsigned
-scsi_command_size(const unsigned char *cmnd)
-{
-	return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
-		scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
-}
-
 #ifdef CONFIG_ACPI
 struct acpi_bus_type;
 
@@ -240,22 +58,6 @@ extern void
 scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus);
 #endif
 
-/*
- *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
- *  T10/1561-D Revision 4 Draft dated 7th November 2002.
- */
-#define SAM_STAT_GOOD            0x00
-#define SAM_STAT_CHECK_CONDITION 0x02
-#define SAM_STAT_CONDITION_MET   0x04
-#define SAM_STAT_BUSY            0x08
-#define SAM_STAT_INTERMEDIATE    0x10
-#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
-#define SAM_STAT_RESERVATION_CONFLICT 0x18
-#define SAM_STAT_COMMAND_TERMINATED 0x22	/* obsolete in SAM-3 */
-#define SAM_STAT_TASK_SET_FULL   0x28
-#define SAM_STAT_ACA_ACTIVE      0x30
-#define SAM_STAT_TASK_ABORTED    0x40
-
 /** scsi_status_is_good - check the status return.
  *
  * @status: the status passed up from the driver (including host and
@@ -279,86 +81,6 @@ static inline int scsi_status_is_good(int status)
 		(status == SAM_STAT_COMMAND_TERMINATED));
 }
 
-/*
- *  Status codes. These are deprecated as they are shifted 1 bit right
- *  from those found in the SCSI standards. This causes confusion for
- *  applications that are ported to several OSes. Prefer SAM Status codes
- *  above.
- */
-
-#define GOOD                 0x00
-#define CHECK_CONDITION      0x01
-#define CONDITION_GOOD       0x02
-#define BUSY                 0x04
-#define INTERMEDIATE_GOOD    0x08
-#define INTERMEDIATE_C_GOOD  0x0a
-#define RESERVATION_CONFLICT 0x0c
-#define COMMAND_TERMINATED   0x11
-#define QUEUE_FULL           0x14
-#define ACA_ACTIVE           0x18
-#define TASK_ABORTED         0x20
-
-#define STATUS_MASK          0xfe
-
-/*
- *  SENSE KEYS
- */
-
-#define NO_SENSE            0x00
-#define RECOVERED_ERROR     0x01
-#define NOT_READY           0x02
-#define MEDIUM_ERROR        0x03
-#define HARDWARE_ERROR      0x04
-#define ILLEGAL_REQUEST     0x05
-#define UNIT_ATTENTION      0x06
-#define DATA_PROTECT        0x07
-#define BLANK_CHECK         0x08
-#define COPY_ABORTED        0x0a
-#define ABORTED_COMMAND     0x0b
-#define VOLUME_OVERFLOW     0x0d
-#define MISCOMPARE          0x0e
-
-
-/*
- *  DEVICE TYPES
- *  Please keep them in 0x%02x format for $MODALIAS to work
- */
-
-#define TYPE_DISK           0x00
-#define TYPE_TAPE           0x01
-#define TYPE_PRINTER        0x02
-#define TYPE_PROCESSOR      0x03    /* HP scanners use this */
-#define TYPE_WORM           0x04    /* Treated as ROM by our system */
-#define TYPE_ROM            0x05
-#define TYPE_SCANNER        0x06
-#define TYPE_MOD            0x07    /* Magneto-optical disk - 
-				     * - treated as TYPE_DISK */
-#define TYPE_MEDIUM_CHANGER 0x08
-#define TYPE_COMM           0x09    /* Communications device */
-#define TYPE_RAID           0x0c
-#define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
-#define TYPE_RBC	    0x0e
-#define TYPE_OSD            0x11
-#define TYPE_ZBC            0x14
-#define TYPE_WLUN           0x1e    /* well-known logical unit */
-#define TYPE_NO_LUN         0x7f
-
-/* SCSI protocols; these are taken from SPC-3 section 7.5 */
-enum scsi_protocol {
-	SCSI_PROTOCOL_FCP = 0,	/* Fibre Channel */
-	SCSI_PROTOCOL_SPI = 1,	/* parallel SCSI */
-	SCSI_PROTOCOL_SSA = 2,	/* Serial Storage Architecture - Obsolete */
-	SCSI_PROTOCOL_SBP = 3,	/* firewire */
-	SCSI_PROTOCOL_SRP = 4,	/* Infiniband RDMA */
-	SCSI_PROTOCOL_ISCSI = 5,
-	SCSI_PROTOCOL_SAS = 6,
-	SCSI_PROTOCOL_ADT = 7,	/* Media Changers */
-	SCSI_PROTOCOL_ATA = 8,
-	SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
-};
-
-/* Returns a human-readable name for the device */
-extern const char * scsi_device_type(unsigned type);
 
 /*
  * standard mode-select header prepended to all mode-select commands
@@ -380,13 +102,6 @@ struct ccs_modesel_head {
 };
 
 /*
- * ScsiLun: 8 byte LUN.
- */
-struct scsi_lun {
-	__u8 scsi_lun[8];
-};
-
-/*
  * The Well Known LUNS (SAM-3) in our int representation of a LUN
  */
 #define SCSI_W_LUN_BASE 0xc100
diff --git a/kernel/include/scsi/scsi_common.h b/kernel/include/scsi/scsi_common.h
new file mode 100644
index 000000000..11571b2a8
--- /dev/null
+++ b/kernel/include/scsi/scsi_common.h
@@ -0,0 +1,69 @@
+/*
+ * Functions used by both the SCSI initiator code and the SCSI target code.
+ */
+
+#ifndef _SCSI_COMMON_H_
+#define _SCSI_COMMON_H_
+
+#include <linux/types.h>
+#include <scsi/scsi_proto.h>
+
+static inline unsigned
+scsi_varlen_cdb_length(const void *hdr)
+{
+	return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
+}
+
+extern const unsigned char scsi_command_size_tbl[8];
+#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
+
+static inline unsigned
+scsi_command_size(const unsigned char *cmnd)
+{
+	return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
+		scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
+}
+
+/* Returns a human-readable name for the device */
+extern const char *scsi_device_type(unsigned type);
+
+extern void int_to_scsilun(u64, struct scsi_lun *);
+extern u64 scsilun_to_int(struct scsi_lun *);
+
+/*
+ * This is a slightly modified SCSI sense "descriptor" format header.
+ * The addition is to allow the 0x70 and 0x71 response codes. The idea
+ * is to place the salient data from either "fixed" or "descriptor" sense
+ * format into one structure to ease application processing.
+ *
+ * The original sense buffer should be kept around for those cases
+ * in which more information is required (e.g. the LBA of a MEDIUM ERROR).
+ */
+struct scsi_sense_hdr {		/* See SPC-3 section 4.5 */
+	u8 response_code;	/* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
+	u8 sense_key;
+	u8 asc;
+	u8 ascq;
+	u8 byte4;
+	u8 byte5;
+	u8 byte6;
+	u8 additional_length;	/* always 0 for fixed sense format */
+};
+
+static inline bool scsi_sense_valid(const struct scsi_sense_hdr *sshdr)
+{
+	if (!sshdr)
+		return false;
+
+	return (sshdr->response_code & 0x70) == 0x70;
+}
+
+extern bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
+				 struct scsi_sense_hdr *sshdr);
+
+extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq);
+int scsi_set_sense_information(u8 *buf, int buf_len, u64 info);
+extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
+				       int desc_type);
+
+#endif /* _SCSI_COMMON_H_ */
diff --git a/kernel/include/scsi/scsi_device.h b/kernel/include/scsi/scsi_device.h
index a4c933681..fe89d7cd6 100644
--- a/kernel/include/scsi/scsi_device.h
+++ b/kernel/include/scsi/scsi_device.h
@@ -57,9 +57,10 @@ enum scsi_device_event {
 	SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED,	/* 38 07  UA reported */
 	SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED,	/* 2A 01  UA reported */
 	SDEV_EVT_LUN_CHANGE_REPORTED,			/* 3F 0E  UA reported */
+	SDEV_EVT_ALUA_STATE_CHANGE_REPORTED,		/* 2A 06  UA reported */
 
 	SDEV_EVT_FIRST		= SDEV_EVT_MEDIA_CHANGE,
-	SDEV_EVT_LAST		= SDEV_EVT_LUN_CHANGE_REPORTED,
+	SDEV_EVT_LAST		= SDEV_EVT_ALUA_STATE_CHANGE_REPORTED,
 
 	SDEV_EVT_MAXBITS	= SDEV_EVT_LAST + 1
 };
@@ -195,34 +196,13 @@ struct scsi_device {
 	struct execute_work	ew; /* used to get process context on put */
 	struct work_struct	requeue_work;
 
-	struct scsi_dh_data	*scsi_dh_data;
+	struct scsi_device_handler *handler;
+	void			*handler_data;
+
 	enum scsi_device_state sdev_state;
 	unsigned long		sdev_data[0];
 } __attribute__((aligned(sizeof(unsigned long))));
 
-typedef void (*activate_complete)(void *, int);
-struct scsi_device_handler {
-	/* Used by the infrastructure */
-	struct list_head list; /* list of scsi_device_handlers */
-
-	/* Filled by the hardware handler */
-	struct module *module;
-	const char *name;
-	int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
-	struct scsi_dh_data *(*attach)(struct scsi_device *);
-	void (*detach)(struct scsi_device *);
-	int (*activate)(struct scsi_device *, activate_complete, void *);
-	int (*prep_fn)(struct scsi_device *, struct request *);
-	int (*set_params)(struct scsi_device *, const char *);
-	bool (*match)(struct scsi_device *);
-};
-
-struct scsi_dh_data {
-	struct scsi_device_handler *scsi_dh;
-	struct scsi_device *sdev;
-	struct kref kref;
-};
-
 #define	to_scsi_device(d)	\
 	container_of(d, struct scsi_device, sdev_gendev)
 #define	class_to_sdev(d)	\
@@ -413,8 +393,6 @@ extern void scsi_target_reap(struct scsi_target *);
 extern void scsi_target_block(struct device *);
 extern void scsi_target_unblock(struct device *, enum scsi_device_state);
 extern void scsi_remove_target(struct device *);
-extern void int_to_scsilun(u64, struct scsi_lun *);
-extern u64 scsilun_to_int(struct scsi_lun *);
 extern const char *scsi_device_state_name(enum scsi_device_state);
 extern int scsi_is_sdev_device(const struct device *);
 extern int scsi_is_target_device(const struct device *);
diff --git a/kernel/include/scsi/scsi_dh.h b/kernel/include/scsi/scsi_dh.h
index 620c723ee..85d731746 100644
--- a/kernel/include/scsi/scsi_dh.h
+++ b/kernel/include/scsi/scsi_dh.h
@@ -55,11 +55,26 @@ enum {
 	SCSI_DH_NOSYS,
 	SCSI_DH_DRIVER_MAX,
 };
-#if defined(CONFIG_SCSI_DH) || defined(CONFIG_SCSI_DH_MODULE)
+
+typedef void (*activate_complete)(void *, int);
+struct scsi_device_handler {
+	/* Used by the infrastructure */
+	struct list_head list; /* list of scsi_device_handlers */
+
+	/* Filled by the hardware handler */
+	struct module *module;
+	const char *name;
+	int (*check_sense)(struct scsi_device *, struct scsi_sense_hdr *);
+	int (*attach)(struct scsi_device *);
+	void (*detach)(struct scsi_device *);
+	int (*activate)(struct scsi_device *, activate_complete, void *);
+	int (*prep_fn)(struct scsi_device *, struct request *);
+	int (*set_params)(struct scsi_device *, const char *);
+};
+
+#ifdef CONFIG_SCSI_DH
 extern int scsi_dh_activate(struct request_queue *, activate_complete, void *);
-extern int scsi_dh_handler_exist(const char *);
 extern int scsi_dh_attach(struct request_queue *, const char *);
-extern void scsi_dh_detach(struct request_queue *);
 extern const char *scsi_dh_attached_handler_name(struct request_queue *, gfp_t);
 extern int scsi_dh_set_params(struct request_queue *, const char *);
 #else
@@ -69,18 +84,10 @@ static inline int scsi_dh_activate(struct request_queue *req,
 	fn(data, 0);
 	return 0;
 }
-static inline int scsi_dh_handler_exist(const char *name)
-{
-	return 0;
-}
 static inline int scsi_dh_attach(struct request_queue *req, const char *name)
 {
 	return SCSI_DH_NOSYS;
 }
-static inline void scsi_dh_detach(struct request_queue *q)
-{
-	return;
-}
 static inline const char *scsi_dh_attached_handler_name(struct request_queue *q,
 							gfp_t gfp)
 {
diff --git a/kernel/include/scsi/scsi_eh.h b/kernel/include/scsi/scsi_eh.h
index 1e1421b06..dbb8c640e 100644
--- a/kernel/include/scsi/scsi_eh.h
+++ b/kernel/include/scsi/scsi_eh.h
@@ -4,46 +4,16 @@
 #include <linux/scatterlist.h>
 
 #include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_common.h>
 struct scsi_device;
 struct Scsi_Host;
 
-/*
- * This is a slightly modified SCSI sense "descriptor" format header.
- * The addition is to allow the 0x70 and 0x71 response codes. The idea
- * is to place the salient data from either "fixed" or "descriptor" sense
- * format into one structure to ease application processing.
- *
- * The original sense buffer should be kept around for those cases
- * in which more information is required (e.g. the LBA of a MEDIUM ERROR).
- */
-struct scsi_sense_hdr {		/* See SPC-3 section 4.5 */
-	u8 response_code;	/* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */
-	u8 sense_key;
-	u8 asc;
-	u8 ascq;
-	u8 byte4;
-	u8 byte5;
-	u8 byte6;
-	u8 additional_length;	/* always 0 for fixed sense format */
-};
-
-static inline bool scsi_sense_valid(const struct scsi_sense_hdr *sshdr)
-{
-	if (!sshdr)
-		return false;
-
-	return (sshdr->response_code & 0x70) == 0x70;
-}
-
-
 extern void scsi_eh_finish_cmd(struct scsi_cmnd *scmd,
 			       struct list_head *done_q);
 extern void scsi_eh_flush_done_q(struct list_head *done_q);
 extern void scsi_report_bus_reset(struct Scsi_Host *, int);
 extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
 extern int scsi_block_when_processing_errors(struct scsi_device *);
-extern bool scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
-				 struct scsi_sense_hdr *sshdr);
 extern bool scsi_command_normalize_sense(const struct scsi_cmnd *cmd,
 					 struct scsi_sense_hdr *sshdr);
 
@@ -52,14 +22,9 @@ static inline bool scsi_sense_is_deferred(const struct scsi_sense_hdr *sshdr)
 	return ((sshdr->response_code >= 0x70) && (sshdr->response_code & 1));
 }
 
-extern const u8 * scsi_sense_desc_find(const u8 * sense_buffer, int sb_len,
-				       int desc_type);
-
 extern int scsi_get_sense_info_fld(const u8 * sense_buffer, int sb_len,
 				   u64 * info_out);
 
-extern void scsi_build_sense_buffer(int desc, u8 *buf, u8 key, u8 asc, u8 ascq);
-
 extern int scsi_ioctl_reset(struct scsi_device *, int __user *);
 
 struct scsi_eh_save {
diff --git a/kernel/include/scsi/scsi_host.h b/kernel/include/scsi/scsi_host.h
index e113c757d..fcfa3d7f5 100644
--- a/kernel/include/scsi/scsi_host.h
+++ b/kernel/include/scsi/scsi_host.h
@@ -406,11 +406,6 @@ struct scsi_host_template {
 	int tag_alloc_policy;
 
 	/*
-	 * Let the block layer assigns tags to all commands.
-	 */
-	unsigned use_blk_tags:1;
-
-	/*
 	 * Track QUEUE_FULL events and reduce queue depth on demand.
 	 */
 	unsigned track_queue_depth:1;
@@ -673,6 +668,9 @@ struct Scsi_Host {
 	unsigned use_blk_mq:1;
 	unsigned use_cmd_list:1;
 
+	/* Host responded with short (<36 bytes) INQUIRY result */
+	unsigned short_inquiry:1;
+
 	/*
 	 * Optional work queue to be utilized by the transport
 	 */
diff --git a/kernel/include/scsi/scsi_proto.h b/kernel/include/scsi/scsi_proto.h
new file mode 100644
index 000000000..a9fbf1b38
--- /dev/null
+++ b/kernel/include/scsi/scsi_proto.h
@@ -0,0 +1,281 @@
+/*
+ * This header file contains public constants and structures used by
+ * both the SCSI initiator and the SCSI target code.
+ *
+ * For documentation on the OPCODES, MESSAGES, and SENSE values,
+ * please consult the SCSI standard.
+ */
+
+#ifndef _SCSI_PROTO_H_
+#define _SCSI_PROTO_H_
+
+#include <linux/types.h>
+
+/*
+ *      SCSI opcodes
+ */
+
+#define TEST_UNIT_READY       0x00
+#define REZERO_UNIT           0x01
+#define REQUEST_SENSE         0x03
+#define FORMAT_UNIT           0x04
+#define READ_BLOCK_LIMITS     0x05
+#define REASSIGN_BLOCKS       0x07
+#define INITIALIZE_ELEMENT_STATUS 0x07
+#define READ_6                0x08
+#define WRITE_6               0x0a
+#define SEEK_6                0x0b
+#define READ_REVERSE          0x0f
+#define WRITE_FILEMARKS       0x10
+#define SPACE                 0x11
+#define INQUIRY               0x12
+#define RECOVER_BUFFERED_DATA 0x14
+#define MODE_SELECT           0x15
+#define RESERVE               0x16
+#define RELEASE               0x17
+#define COPY                  0x18
+#define ERASE                 0x19
+#define MODE_SENSE            0x1a
+#define START_STOP            0x1b
+#define RECEIVE_DIAGNOSTIC    0x1c
+#define SEND_DIAGNOSTIC       0x1d
+#define ALLOW_MEDIUM_REMOVAL  0x1e
+
+#define READ_FORMAT_CAPACITIES 0x23
+#define SET_WINDOW            0x24
+#define READ_CAPACITY         0x25
+#define READ_10               0x28
+#define WRITE_10              0x2a
+#define SEEK_10               0x2b
+#define POSITION_TO_ELEMENT   0x2b
+#define WRITE_VERIFY          0x2e
+#define VERIFY                0x2f
+#define SEARCH_HIGH           0x30
+#define SEARCH_EQUAL          0x31
+#define SEARCH_LOW            0x32
+#define SET_LIMITS            0x33
+#define PRE_FETCH             0x34
+#define READ_POSITION         0x34
+#define SYNCHRONIZE_CACHE     0x35
+#define LOCK_UNLOCK_CACHE     0x36
+#define READ_DEFECT_DATA      0x37
+#define MEDIUM_SCAN           0x38
+#define COMPARE               0x39
+#define COPY_VERIFY           0x3a
+#define WRITE_BUFFER          0x3b
+#define READ_BUFFER           0x3c
+#define UPDATE_BLOCK          0x3d
+#define READ_LONG             0x3e
+#define WRITE_LONG            0x3f
+#define CHANGE_DEFINITION     0x40
+#define WRITE_SAME            0x41
+#define UNMAP		      0x42
+#define READ_TOC              0x43
+#define READ_HEADER           0x44
+#define GET_EVENT_STATUS_NOTIFICATION 0x4a
+#define LOG_SELECT            0x4c
+#define LOG_SENSE             0x4d
+#define XDWRITEREAD_10        0x53
+#define MODE_SELECT_10        0x55
+#define RESERVE_10            0x56
+#define RELEASE_10            0x57
+#define MODE_SENSE_10         0x5a
+#define PERSISTENT_RESERVE_IN 0x5e
+#define PERSISTENT_RESERVE_OUT 0x5f
+#define VARIABLE_LENGTH_CMD   0x7f
+#define REPORT_LUNS           0xa0
+#define SECURITY_PROTOCOL_IN  0xa2
+#define MAINTENANCE_IN        0xa3
+#define MAINTENANCE_OUT       0xa4
+#define MOVE_MEDIUM           0xa5
+#define EXCHANGE_MEDIUM       0xa6
+#define READ_12               0xa8
+#define SERVICE_ACTION_OUT_12 0xa9
+#define WRITE_12              0xaa
+#define READ_MEDIA_SERIAL_NUMBER 0xab /* Obsolete with SPC-2 */
+#define SERVICE_ACTION_IN_12  0xab
+#define WRITE_VERIFY_12       0xae
+#define VERIFY_12	      0xaf
+#define SEARCH_HIGH_12        0xb0
+#define SEARCH_EQUAL_12       0xb1
+#define SEARCH_LOW_12         0xb2
+#define SECURITY_PROTOCOL_OUT 0xb5
+#define READ_ELEMENT_STATUS   0xb8
+#define SEND_VOLUME_TAG       0xb6
+#define WRITE_LONG_2          0xea
+#define EXTENDED_COPY         0x83
+#define RECEIVE_COPY_RESULTS  0x84
+#define ACCESS_CONTROL_IN     0x86
+#define ACCESS_CONTROL_OUT    0x87
+#define READ_16               0x88
+#define COMPARE_AND_WRITE     0x89
+#define WRITE_16              0x8a
+#define READ_ATTRIBUTE        0x8c
+#define WRITE_ATTRIBUTE	      0x8d
+#define VERIFY_16	      0x8f
+#define SYNCHRONIZE_CACHE_16  0x91
+#define WRITE_SAME_16	      0x93
+#define SERVICE_ACTION_BIDIRECTIONAL 0x9d
+#define SERVICE_ACTION_IN_16  0x9e
+#define SERVICE_ACTION_OUT_16 0x9f
+/* values for service action in */
+#define	SAI_READ_CAPACITY_16  0x10
+#define SAI_GET_LBA_STATUS    0x12
+#define SAI_REPORT_REFERRALS  0x13
+/* values for VARIABLE_LENGTH_CMD service action codes
+ * see spc4r17 Section D.3.5, table D.7 and D.8 */
+#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
+/* values for maintenance in */
+#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
+#define MI_REPORT_TARGET_PGS  0x0a
+#define MI_REPORT_ALIASES     0x0b
+#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
+#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
+#define MI_REPORT_PRIORITY    0x0e
+#define MI_REPORT_TIMESTAMP   0x0f
+#define MI_MANAGEMENT_PROTOCOL_IN 0x10
+/* value for MI_REPORT_TARGET_PGS ext header */
+#define MI_EXT_HDR_PARAM_FMT  0x20
+/* values for maintenance out */
+#define MO_SET_IDENTIFYING_INFORMATION 0x06
+#define MO_SET_TARGET_PGS     0x0a
+#define MO_CHANGE_ALIASES     0x0b
+#define MO_SET_PRIORITY       0x0e
+#define MO_SET_TIMESTAMP      0x0f
+#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
+/* values for variable length command */
+#define XDREAD_32	      0x03
+#define XDWRITE_32	      0x04
+#define XPWRITE_32	      0x06
+#define XDWRITEREAD_32	      0x07
+#define READ_32		      0x09
+#define VERIFY_32	      0x0a
+#define WRITE_32	      0x0b
+#define WRITE_SAME_32	      0x0d
+
+/* Values for T10/04-262r7 */
+#define	ATA_16		      0x85	/* 16-byte pass-thru */
+#define	ATA_12		      0xa1	/* 12-byte pass-thru */
+
+/* Vendor specific CDBs start here */
+#define VENDOR_SPECIFIC_CDB 0xc0
+
+/*
+ *	SCSI command lengths
+ */
+
+#define SCSI_MAX_VARLEN_CDB_SIZE 260
+
+/* defined in T10 SCSI Primary Commands-2 (SPC2) */
+struct scsi_varlen_cdb_hdr {
+	__u8 opcode;        /* opcode always == VARIABLE_LENGTH_CMD */
+	__u8 control;
+	__u8 misc[5];
+	__u8 additional_cdb_length;         /* total cdb length - 8 */
+	__be16 service_action;
+	/* service specific data follows */
+};
+
+/*
+ *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
+ *  T10/1561-D Revision 4 Draft dated 7th November 2002.
+ */
+#define SAM_STAT_GOOD            0x00
+#define SAM_STAT_CHECK_CONDITION 0x02
+#define SAM_STAT_CONDITION_MET   0x04
+#define SAM_STAT_BUSY            0x08
+#define SAM_STAT_INTERMEDIATE    0x10
+#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
+#define SAM_STAT_RESERVATION_CONFLICT 0x18
+#define SAM_STAT_COMMAND_TERMINATED 0x22	/* obsolete in SAM-3 */
+#define SAM_STAT_TASK_SET_FULL   0x28
+#define SAM_STAT_ACA_ACTIVE      0x30
+#define SAM_STAT_TASK_ABORTED    0x40
+
+/*
+ *  Status codes. These are deprecated as they are shifted 1 bit right
+ *  from those found in the SCSI standards. This causes confusion for
+ *  applications that are ported to several OSes. Prefer SAM Status codes
+ *  above.
+ */
+
+#define GOOD                 0x00
+#define CHECK_CONDITION      0x01
+#define CONDITION_GOOD       0x02
+#define BUSY                 0x04
+#define INTERMEDIATE_GOOD    0x08
+#define INTERMEDIATE_C_GOOD  0x0a
+#define RESERVATION_CONFLICT 0x0c
+#define COMMAND_TERMINATED   0x11
+#define QUEUE_FULL           0x14
+#define ACA_ACTIVE           0x18
+#define TASK_ABORTED         0x20
+
+#define STATUS_MASK          0xfe
+
+/*
+ *  SENSE KEYS
+ */
+
+#define NO_SENSE            0x00
+#define RECOVERED_ERROR     0x01
+#define NOT_READY           0x02
+#define MEDIUM_ERROR        0x03
+#define HARDWARE_ERROR      0x04
+#define ILLEGAL_REQUEST     0x05
+#define UNIT_ATTENTION      0x06
+#define DATA_PROTECT        0x07
+#define BLANK_CHECK         0x08
+#define COPY_ABORTED        0x0a
+#define ABORTED_COMMAND     0x0b
+#define VOLUME_OVERFLOW     0x0d
+#define MISCOMPARE          0x0e
+
+
+/*
+ *  DEVICE TYPES
+ *  Please keep them in 0x%02x format for $MODALIAS to work
+ */
+
+#define TYPE_DISK           0x00
+#define TYPE_TAPE           0x01
+#define TYPE_PRINTER        0x02
+#define TYPE_PROCESSOR      0x03    /* HP scanners use this */
+#define TYPE_WORM           0x04    /* Treated as ROM by our system */
+#define TYPE_ROM            0x05
+#define TYPE_SCANNER        0x06
+#define TYPE_MOD            0x07    /* Magneto-optical disk -
+				     * - treated as TYPE_DISK */
+#define TYPE_MEDIUM_CHANGER 0x08
+#define TYPE_COMM           0x09    /* Communications device */
+#define TYPE_RAID           0x0c
+#define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
+#define TYPE_RBC	    0x0e
+#define TYPE_OSD            0x11
+#define TYPE_ZBC            0x14
+#define TYPE_WLUN           0x1e    /* well-known logical unit */
+#define TYPE_NO_LUN         0x7f
+
+/* SCSI protocols; these are taken from SPC-3 section 7.5 */
+enum scsi_protocol {
+	SCSI_PROTOCOL_FCP = 0,	/* Fibre Channel */
+	SCSI_PROTOCOL_SPI = 1,	/* parallel SCSI */
+	SCSI_PROTOCOL_SSA = 2,	/* Serial Storage Architecture - Obsolete */
+	SCSI_PROTOCOL_SBP = 3,	/* firewire */
+	SCSI_PROTOCOL_SRP = 4,	/* Infiniband RDMA */
+	SCSI_PROTOCOL_ISCSI = 5,
+	SCSI_PROTOCOL_SAS = 6,
+	SCSI_PROTOCOL_ADT = 7,	/* Media Changers */
+	SCSI_PROTOCOL_ATA = 8,
+	SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
+};
+
+/*
+ * ScsiLun: 8 byte LUN.
+ */
+struct scsi_lun {
+	__u8 scsi_lun[8];
+};
+
+
+#endif /* _SCSI_PROTO_H_ */
diff --git a/kernel/include/scsi/scsi_tcq.h b/kernel/include/scsi/scsi_tcq.h
index b27977e8a..4416b1026 100644
--- a/kernel/include/scsi/scsi_tcq.h
+++ b/kernel/include/scsi/scsi_tcq.h
@@ -10,91 +10,36 @@
 
 
 #ifdef CONFIG_BLOCK
-static inline struct scsi_cmnd *scsi_mq_find_tag(struct Scsi_Host *shost,
-						 int unique_tag)
-{
-	u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
-	struct request *req = NULL;
-
-	if (hwq < shost->tag_set.nr_hw_queues)
-		req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
-				       blk_mq_unique_tag_to_tag(unique_tag));
-	return req ? (struct scsi_cmnd *)req->special : NULL;
-}
-
-/**
- * scsi_find_tag - find a tagged command by device
- * @SDpnt:	pointer to the ScSI device
- * @tag:	tag generated by blk_mq_unique_tag()
- *
- * Notes:
- *	Only works with tags allocated by the generic blk layer.
- **/
-static inline struct scsi_cmnd *scsi_find_tag(struct scsi_device *sdev, int tag)
-{
-        struct request *req;
-
-        if (tag != SCSI_NO_TAG) {
-		if (shost_use_blk_mq(sdev->host))
-			return scsi_mq_find_tag(sdev->host, tag);
-
-		req = blk_queue_find_tag(sdev->request_queue, tag);
-	        return req ? (struct scsi_cmnd *)req->special : NULL;
-	}
-
-	/* single command, look in space */
-	return sdev->current_cmnd;
-}
-
-
-/**
- * scsi_init_shared_tag_map - create a shared tag map
- * @shost:	the host to share the tag map among all devices
- * @depth:	the total depth of the map
- */
-static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth)
-{
-	/*
-	 * We always have a shared tag map around when using blk-mq.
-	 */
-	if (shost_use_blk_mq(shost))
-		return 0;
-
-	/*
-	 * If the shared tag map isn't already initialized, do it now.
-	 * This saves callers from having to check ->bqt when setting up
-	 * devices on the shared host (for libata)
-	 */
-	if (!shost->bqt) {
-		shost->bqt = blk_init_tags(depth,
-			shost->hostt->tag_alloc_policy);
-		if (!shost->bqt)
-			return -ENOMEM;
-	}
-
-	return 0;
-}
-
 /**
  * scsi_host_find_tag - find the tagged command by host
  * @shost:	pointer to scsi_host
- * @tag:	tag generated by blk_mq_unique_tag()
+ * @tag:	tag
  *
- * Notes:
- *	Only works with tags allocated by the generic blk layer.
+ * Note: for devices using multiple hardware queues tag must have been
+ * generated by blk_mq_unique_tag().
  **/
 static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
-						int tag)
+		int tag)
 {
-	struct request *req;
+	struct request *req = NULL;
 
-	if (tag != SCSI_NO_TAG) {
-		if (shost_use_blk_mq(shost))
-			return scsi_mq_find_tag(shost, tag);
+	if (tag == SCSI_NO_TAG)
+		return NULL;
+
+	if (shost_use_blk_mq(shost)) {
+		u16 hwq = blk_mq_unique_tag_to_hwq(tag);
+
+		if (hwq < shost->tag_set.nr_hw_queues) {
+			req = blk_mq_tag_to_rq(shost->tag_set.tags[hwq],
+				blk_mq_unique_tag_to_tag(tag));
+		}
+	} else {
 		req = blk_map_queue_find_tag(shost->bqt, tag);
-		return req ? (struct scsi_cmnd *)req->special : NULL;
 	}
-	return NULL;
+
+	if (!req)
+		return NULL;
+	return req->special;
 }
 
 #endif /* CONFIG_BLOCK */
diff --git a/kernel/include/scsi/scsi_transport_iscsi.h b/kernel/include/scsi/scsi_transport_iscsi.h
index 2555ee534..6183d20a0 100644
--- a/kernel/include/scsi/scsi_transport_iscsi.h
+++ b/kernel/include/scsi/scsi_transport_iscsi.h
@@ -241,6 +241,7 @@ struct iscsi_cls_session {
 
 	/* recovery fields */
 	int recovery_tmo;
+	bool recovery_tmo_sysfs_override;
 	struct delayed_work recovery_work;
 
 	unsigned int target_id;
diff --git a/kernel/include/scsi/scsi_transport_srp.h b/kernel/include/scsi/scsi_transport_srp.h
index cdb05dd1d..d40d3ef25 100644
--- a/kernel/include/scsi/scsi_transport_srp.h
+++ b/kernel/include/scsi/scsi_transport_srp.h
@@ -119,6 +119,7 @@ extern struct srp_rport *srp_rport_add(struct Scsi_Host *,
 extern void srp_rport_del(struct srp_rport *);
 extern int srp_tmo_valid(int reconnect_delay, int fast_io_fail_tmo,
 			 int dev_loss_tmo);
+int srp_parse_tmo(int *tmo, const char *buf);
 extern int srp_reconnect_rport(struct srp_rport *rport);
 extern void srp_start_tl_fail_timers(struct srp_rport *rport);
 extern void srp_remove_host(struct Scsi_Host *);
diff --git a/kernel/include/scsi/srp.h b/kernel/include/scsi/srp.h
index 1ae84db4c..5be834de4 100644
--- a/kernel/include/scsi/srp.h
+++ b/kernel/include/scsi/srp.h
@@ -42,6 +42,7 @@
  */
 
 #include <linux/types.h>
+#include <scsi/scsi.h>
 
 enum {
 	SRP_LOGIN_REQ	= 0x00,
@@ -179,7 +180,7 @@ struct srp_tsk_mgmt {
 	u8	reserved1[6];
 	u64	tag;
 	u8	reserved2[4];
-	__be64	lun __attribute__((packed));
+	struct scsi_lun	lun;
 	u8	reserved3[2];
 	u8	tsk_mgmt_func;
 	u8	reserved4;
@@ -200,7 +201,7 @@ struct srp_cmd {
 	u8	data_in_desc_cnt;
 	u64	tag;
 	u8	reserved2[4];
-	__be64	lun __attribute__((packed));
+	struct scsi_lun	lun;
 	u8	reserved3;
 	u8	task_attr;
 	u8	reserved4;
@@ -265,7 +266,7 @@ struct srp_aer_req {
 	__be32	req_lim_delta;
 	u64	tag;
 	u32	reserved2;
-	__be64	lun;
+	struct scsi_lun	lun;
 	__be32	sense_data_len;
 	u32	reserved3;
 	u8	sense_data[0];