target: remove struct se_task

We can use struct se_cmd for everything it did.  Make sure to pass the S/G
list and data direction to the execution function to ease adding back BIDI
support later on.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

9 files changed, 205 insertions, 407 deletions

diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c
index a984964ab70a..bbcedcfc068a 100644
--- a/drivers/target/target_core_file.c
+++ b/drivers/target/target_core_file.c
@@ -244,53 +244,33 @@ static void fd_free_device(void *p)
         kfree(fd_dev);
 }
 
-static inline struct fd_request *FILE_REQ(struct se_task *task)
+static int fd_do_readv(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents)
 {
-        return container_of(task, struct fd_request, fd_task);
-}
-
-
-static struct se_task *
-fd_alloc_task(unsigned char *cdb)
-{
-        struct fd_request *fd_req;
-
-        fd_req = kzalloc(sizeof(struct fd_request), GFP_KERNEL);
-        if (!fd_req) {
-                pr_err("Unable to allocate struct fd_request\n");
-                return NULL;
-        }
-
-        return &fd_req->fd_task;
-}
-
-static int fd_do_readv(struct se_task *task)
-{
-        struct fd_request *req = FILE_REQ(task);
-        struct se_device *se_dev = req->fd_task.task_se_cmd->se_dev;
+        struct se_device *se_dev = cmd->se_dev;
         struct fd_dev *dev = se_dev->dev_ptr;
         struct file *fd = dev->fd_file;
-        struct scatterlist *sg = task->task_sg;
+        struct scatterlist *sg;
         struct iovec *iov;
         mm_segment_t old_fs;
-        loff_t pos = (task->task_se_cmd->t_task_lba *
+        loff_t pos = (cmd->t_task_lba *
                       se_dev->se_sub_dev->se_dev_attrib.block_size);
         int ret = 0, i;
 
-        iov = kzalloc(sizeof(struct iovec) * task->task_sg_nents, GFP_KERNEL);
+        iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL);
         if (!iov) {
                 pr_err("Unable to allocate fd_do_readv iov[]\n");
                 return -ENOMEM;
         }
 
-        for_each_sg(task->task_sg, sg, task->task_sg_nents, i) {
+        for_each_sg(sgl, sg, sgl_nents, i) {
                 iov[i].iov_len = sg->length;
                 iov[i].iov_base = sg_virt(sg);
         }
 
         old_fs = get_fs();
         set_fs(get_ds());
-        ret = vfs_readv(fd, &iov[0], task->task_sg_nents, &pos);
+        ret = vfs_readv(fd, &iov[0], sgl_nents, &pos);
         set_fs(old_fs);
 
         kfree(iov);
@@ -300,10 +280,10 @@ static int fd_do_readv(struct se_task *task)
          * block_device.
          */
         if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
-                if (ret < 0 || ret != task->task_se_cmd->data_length) {
+                if (ret < 0 || ret != cmd->data_length) {
                         pr_err("vfs_readv() returned %d,"
                                 " expecting %d for S_ISBLK\n", ret,
-                                (int)task->task_se_cmd->data_length);
+                                (int)cmd->data_length);
                         return (ret < 0 ? ret : -EINVAL);
                 }
         } else {
@@ -317,38 +297,38 @@ static int fd_do_readv(struct se_task *task)
         return 1;
 }
 
-static int fd_do_writev(struct se_task *task)
+static int fd_do_writev(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents)
 {
-        struct fd_request *req = FILE_REQ(task);
-        struct se_device *se_dev = req->fd_task.task_se_cmd->se_dev;
+        struct se_device *se_dev = cmd->se_dev;
         struct fd_dev *dev = se_dev->dev_ptr;
         struct file *fd = dev->fd_file;
-        struct scatterlist *sg = task->task_sg;
+        struct scatterlist *sg;
         struct iovec *iov;
         mm_segment_t old_fs;
-        loff_t pos = (task->task_se_cmd->t_task_lba *
+        loff_t pos = (cmd->t_task_lba *
                       se_dev->se_sub_dev->se_dev_attrib.block_size);
         int ret, i = 0;
 
-        iov = kzalloc(sizeof(struct iovec) * task->task_sg_nents, GFP_KERNEL);
+        iov = kzalloc(sizeof(struct iovec) * sgl_nents, GFP_KERNEL);
         if (!iov) {
                 pr_err("Unable to allocate fd_do_writev iov[]\n");
                 return -ENOMEM;
         }
 
-        for_each_sg(task->task_sg, sg, task->task_sg_nents, i) {
+        for_each_sg(sgl, sg, sgl_nents, i) {
                 iov[i].iov_len = sg->length;
                 iov[i].iov_base = sg_virt(sg);
         }
 
         old_fs = get_fs();
         set_fs(get_ds());
-        ret = vfs_writev(fd, &iov[0], task->task_sg_nents, &pos);
+        ret = vfs_writev(fd, &iov[0], sgl_nents, &pos);
         set_fs(old_fs);
 
         kfree(iov);
 
-        if (ret < 0 || ret != task->task_se_cmd->data_length) {
+        if (ret < 0 || ret != cmd->data_length) {
                 pr_err("vfs_writev() returned %d\n", ret);
                 return (ret < 0 ? ret : -EINVAL);
         }
@@ -369,7 +349,7 @@ static void fd_emulate_sync_cache(struct se_cmd *cmd)
          * for this SYNCHRONIZE_CACHE op
          */
         if (immed)
-                transport_complete_sync_cache(cmd, 1);
+                target_complete_cmd(cmd, SAM_STAT_GOOD);
 
         /*
          * Determine if we will be flushing the entire device.
@@ -389,35 +369,37 @@ static void fd_emulate_sync_cache(struct se_cmd *cmd)
         if (ret != 0)
                 pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret);
 
-        if (!immed)
-                transport_complete_sync_cache(cmd, ret == 0);
+        if (immed)
+                return;
+
+        if (ret) {
+                cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+                target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
+        } else {
+                target_complete_cmd(cmd, SAM_STAT_GOOD);
+        }
 }
 
-/*
- * WRITE Force Unit Access (FUA) emulation on a per struct se_task
- * LBA range basis..
- */
-static void fd_emulate_write_fua(struct se_cmd *cmd, struct se_task *task)
+static void fd_emulate_write_fua(struct se_cmd *cmd)
 {
         struct se_device *dev = cmd->se_dev;
         struct fd_dev *fd_dev = dev->dev_ptr;
-        loff_t start = task->task_se_cmd->t_task_lba *
+        loff_t start = cmd->t_task_lba *
                 dev->se_sub_dev->se_dev_attrib.block_size;
-        loff_t end = start + task->task_se_cmd->data_length;
+        loff_t end = start + cmd->data_length;
         int ret;
 
         pr_debug("FILEIO: FUA WRITE LBA: %llu, bytes: %u\n",
-                        task->task_se_cmd->t_task_lba,
-                        task->task_se_cmd->data_length);
+                cmd->t_task_lba, cmd->data_length);
 
         ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
         if (ret != 0)
                 pr_err("FILEIO: vfs_fsync_range() failed: %d\n", ret);
 }
 
-static int fd_do_task(struct se_task *task)
+static int fd_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents, enum dma_data_direction data_direction)
 {
-        struct se_cmd *cmd = task->task_se_cmd;
         struct se_device *dev = cmd->se_dev;
         int ret = 0;
 
@@ -425,10 +407,10 @@ static int fd_do_task(struct se_task *task)
          * Call vectorized fileio functions to map struct scatterlist
          * physical memory addresses to struct iovec virtual memory.
          */
-        if (task->task_data_direction == DMA_FROM_DEVICE) {
-                ret = fd_do_readv(task);
+        if (data_direction == DMA_FROM_DEVICE) {
+                ret = fd_do_readv(cmd, sgl, sgl_nents);
         } else {
-                ret = fd_do_writev(task);
+                ret = fd_do_writev(cmd, sgl, sgl_nents);
 
                 if (ret > 0 &&
                     dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0 &&
@@ -439,7 +421,7 @@ static int fd_do_task(struct se_task *task)
                          * and return some sense data to let the initiator
                          * know the FUA WRITE cache sync failed..?
                          */
-                        fd_emulate_write_fua(cmd, task);
+                        fd_emulate_write_fua(cmd);
                 }
 
         }
@@ -448,24 +430,11 @@ static int fd_do_task(struct se_task *task)
                 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
                 return ret;
         }
-        if (ret) {
-                task->task_scsi_status = GOOD;
-                transport_complete_task(task, 1);
-        }
+        if (ret)
+                target_complete_cmd(cmd, SAM_STAT_GOOD);
         return 0;
 }
 
-/*      fd_free_task(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static void fd_free_task(struct se_task *task)
-{
-        struct fd_request *req = FILE_REQ(task);
-
-        kfree(req);
-}
-
 enum {
         Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err
 };
@@ -618,10 +587,8 @@ static struct se_subsystem_api fileio_template = {
         .allocate_virtdevice    = fd_allocate_virtdevice,
         .create_virtdevice      = fd_create_virtdevice,
         .free_device            = fd_free_device,
-        .alloc_task             = fd_alloc_task,
-        .do_task                = fd_do_task,
+        .execute_cmd            = fd_execute_cmd,
         .do_sync_cache          = fd_emulate_sync_cache,
-        .free_task              = fd_free_task,
         .check_configfs_dev_params = fd_check_configfs_dev_params,
         .set_configfs_dev_params = fd_set_configfs_dev_params,
         .show_configfs_dev_params = fd_show_configfs_dev_params,
diff --git a/drivers/target/target_core_file.h b/drivers/target/target_core_file.h
index 59e6e73106c2..fbd59ef7d8be 100644
--- a/drivers/target/target_core_file.h
+++ b/drivers/target/target_core_file.h
@@ -12,10 +12,6 @@
 #define RRF_EMULATE_CDB         0x01
 #define RRF_GOT_LBA             0x02
 
-struct fd_request {
-        struct se_task  fd_task;
-};
-
 #define FBDF_HAS_PATH           0x01
 #define FBDF_HAS_SIZE           0x02
 #define FDBD_USE_BUFFERED_IO    0x04
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 82ec0d3fa9dd..fd47950727b4 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -189,26 +189,6 @@ static void iblock_free_device(void *p)
         kfree(ib_dev);
 }
 
-static inline struct iblock_req *IBLOCK_REQ(struct se_task *task)
-{
-        return container_of(task, struct iblock_req, ib_task);
-}
-
-static struct se_task *
-iblock_alloc_task(unsigned char *cdb)
-{
-        struct iblock_req *ib_req;
-
-        ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
-        if (!ib_req) {
-                pr_err("Unable to allocate memory for struct iblock_req\n");
-                return NULL;
-        }
-
-        atomic_set(&ib_req->pending, 1);
-        return &ib_req->ib_task;
-}
-
 static unsigned long long iblock_emulate_read_cap_with_block_size(
         struct se_device *dev,
         struct block_device *bd,
@@ -295,8 +275,16 @@ static void iblock_end_io_flush(struct bio *bio, int err)
         if (err)
                 pr_err("IBLOCK: cache flush failed: %d\n", err);
 
-        if (cmd)
-                transport_complete_sync_cache(cmd, err == 0);
+        if (cmd) {
+                if (err) {
+                        cmd->scsi_sense_reason =
+                                TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+                        target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
+                } else {
+                        target_complete_cmd(cmd, SAM_STAT_GOOD);
+                }
+        }
+
         bio_put(bio);
 }
 
@@ -315,7 +303,7 @@ static void iblock_emulate_sync_cache(struct se_cmd *cmd)
          * for this SYNCHRONIZE_CACHE op.
          */
         if (immed)
-                transport_complete_sync_cache(cmd, 1);
+                target_complete_cmd(cmd, SAM_STAT_GOOD);
 
         bio = bio_alloc(GFP_KERNEL, 0);
         bio->bi_end_io = iblock_end_io_flush;
@@ -334,11 +322,6 @@ static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range)
         return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier);
 }
 
-static void iblock_free_task(struct se_task *task)
-{
-        kfree(IBLOCK_REQ(task));
-}
-
 enum {
         Opt_udev_path, Opt_force, Opt_err
 };
@@ -447,19 +430,35 @@ static ssize_t iblock_show_configfs_dev_params(
         return bl;
 }
 
+static void iblock_complete_cmd(struct se_cmd *cmd)
+{
+        struct iblock_req *ibr = cmd->priv;
+        u8 status;
+
+        if (!atomic_dec_and_test(&ibr->pending))
+                return;
+
+        if (atomic_read(&ibr->ib_bio_err_cnt))
+                status = SAM_STAT_CHECK_CONDITION;
+        else
+                status = SAM_STAT_GOOD;
+
+        target_complete_cmd(cmd, status);
+        kfree(ibr);
+}
+
 static void iblock_bio_destructor(struct bio *bio)
 {
-        struct se_task *task = bio->bi_private;
-        struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr;
+        struct se_cmd *cmd = bio->bi_private;
+        struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
 
         bio_free(bio, ib_dev->ibd_bio_set);
 }
 
 static struct bio *
-iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num)
+iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num)
 {
-        struct iblock_dev *ib_dev = task->task_se_cmd->se_dev->dev_ptr;
-        struct iblock_req *ib_req = IBLOCK_REQ(task);
+        struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
         struct bio *bio;
 
         /*
@@ -475,20 +474,11 @@ iblock_get_bio(struct se_task *task, sector_t lba, u32 sg_num)
                 return NULL;
         }
 
-        pr_debug("Allocated bio: %p task_sg_nents: %u using ibd_bio_set:"
-                " %p\n", bio, task->task_sg_nents, ib_dev->ibd_bio_set);
-        pr_debug("Allocated bio: %p task_size: %u\n", bio,
-                task->task_se_cmd->data_length);
-
         bio->bi_bdev = ib_dev->ibd_bd;
-        bio->bi_private = task;
+        bio->bi_private = cmd;
         bio->bi_destructor = iblock_bio_destructor;
         bio->bi_end_io = &iblock_bio_done;
         bio->bi_sector = lba;
-        atomic_inc(&ib_req->pending);
-
-        pr_debug("Set bio->bi_sector: %llu\n", (unsigned long long)bio->bi_sector);
-        pr_debug("Set ib_req->pending: %d\n", atomic_read(&ib_req->pending));
         return bio;
 }
 
@@ -503,20 +493,21 @@ static void iblock_submit_bios(struct bio_list *list, int rw)
         blk_finish_plug(&plug);
 }
 
-static int iblock_do_task(struct se_task *task)
+static int iblock_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents, enum dma_data_direction data_direction)
 {
-        struct se_cmd *cmd = task->task_se_cmd;
         struct se_device *dev = cmd->se_dev;
-        struct iblock_req *ibr = IBLOCK_REQ(task);
+        struct iblock_req *ibr;
         struct bio *bio;
         struct bio_list list;
         struct scatterlist *sg;
-        u32 i, sg_num = task->task_sg_nents;
+        u32 sg_num = sgl_nents;
         sector_t block_lba;
         unsigned bio_cnt;
         int rw;
+        int i;
 
-        if (task->task_data_direction == DMA_TO_DEVICE) {
+        if (data_direction == DMA_TO_DEVICE) {
                 /*
                  * Force data to disk if we pretend to not have a volatile
                  * write cache, or the initiator set the Force Unit Access bit.
@@ -532,8 +523,8 @@ static int iblock_do_task(struct se_task *task)
         }
 
         /*
-         * Do starting conversion up from non 512-byte blocksize with
-         * struct se_task SCSI blocksize into Linux/Block 512 units for BIO.
+         * Convert the blocksize advertised to the initiator to the 512 byte
+         * units unconditionally used by the Linux block layer.
          */
         if (dev->se_sub_dev->se_dev_attrib.block_size == 4096)
                 block_lba = (cmd->t_task_lba << 3);
@@ -550,17 +541,22 @@ static int iblock_do_task(struct se_task *task)
                 return -ENOSYS;
         }
 
-        bio = iblock_get_bio(task, block_lba, sg_num);
-        if (!bio) {
-                cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-                return -ENOMEM;
-        }
+        ibr = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
+        if (!ibr)
+                goto fail;
+        cmd->priv = ibr;
+
+        bio = iblock_get_bio(cmd, block_lba, sgl_nents);
+        if (!bio)
+                goto fail_free_ibr;
 
         bio_list_init(&list);
         bio_list_add(&list, bio);
+
+        atomic_set(&ibr->pending, 2);
         bio_cnt = 1;
 
-        for_each_sg(task->task_sg, sg, task->task_sg_nents, i) {
+        for_each_sg(sgl, sg, sgl_nents, i) {
                 /*
                  * XXX: if the length the device accepts is shorter than the
                  *      length of the S/G list entry this will cause and
@@ -573,9 +569,11 @@ static int iblock_do_task(struct se_task *task)
                                 bio_cnt = 0;
                         }
 
-                        bio = iblock_get_bio(task, block_lba, sg_num);
+                        bio = iblock_get_bio(cmd, block_lba, sg_num);
                         if (!bio)
-                                goto fail;
+                                goto fail_put_bios;
+
+                        atomic_inc(&ibr->pending);
                         bio_list_add(&list, bio);
                         bio_cnt++;
                 }
@@ -586,17 +584,16 @@ static int iblock_do_task(struct se_task *task)
         }
 
         iblock_submit_bios(&list, rw);
-
-        if (atomic_dec_and_test(&ibr->pending)) {
-                transport_complete_task(task,
-                                !atomic_read(&ibr->ib_bio_err_cnt));
-        }
+        iblock_complete_cmd(cmd);
         return 0;
 
-fail:
+fail_put_bios:
         while ((bio = bio_list_pop(&list)))
                 bio_put(bio);
+fail_free_ibr:
+        kfree(ibr);
         cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+fail:
         return -ENOMEM;
 }
 
@@ -621,8 +618,8 @@ static sector_t iblock_get_blocks(struct se_device *dev)
 
 static void iblock_bio_done(struct bio *bio, int err)
 {
-        struct se_task *task = bio->bi_private;
-        struct iblock_req *ibr = IBLOCK_REQ(task);
+        struct se_cmd *cmd = bio->bi_private;
+        struct iblock_req *ibr = cmd->priv;
 
         /*
          * Set -EIO if !BIO_UPTODATE and the passed is still err=0
@@ -642,14 +639,7 @@ static void iblock_bio_done(struct bio *bio, int err)
 
         bio_put(bio);
 
-        if (!atomic_dec_and_test(&ibr->pending))
-                return;
-
-        pr_debug("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n",
-                 task, bio, task->task_se_cmd->t_task_lba,
-                 (unsigned long long)bio->bi_sector, err);
-
-        transport_complete_task(task, !atomic_read(&ibr->ib_bio_err_cnt));
+        iblock_complete_cmd(cmd);
 }
 
 static struct se_subsystem_api iblock_template = {
@@ -663,11 +653,9 @@ static struct se_subsystem_api iblock_template = {
         .allocate_virtdevice    = iblock_allocate_virtdevice,
         .create_virtdevice      = iblock_create_virtdevice,
         .free_device            = iblock_free_device,
-        .alloc_task             = iblock_alloc_task,
-        .do_task                = iblock_do_task,
+        .execute_cmd            = iblock_execute_cmd,
         .do_discard             = iblock_do_discard,
         .do_sync_cache          = iblock_emulate_sync_cache,
-        .free_task              = iblock_free_task,
         .check_configfs_dev_params = iblock_check_configfs_dev_params,
         .set_configfs_dev_params = iblock_set_configfs_dev_params,
         .show_configfs_dev_params = iblock_show_configfs_dev_params,
diff --git a/drivers/target/target_core_iblock.h b/drivers/target/target_core_iblock.h
index e929370b6fd3..66cf7b9e205e 100644
--- a/drivers/target/target_core_iblock.h
+++ b/drivers/target/target_core_iblock.h
@@ -7,7 +7,6 @@
 #define IBLOCK_LBA_SHIFT        9
 
 struct iblock_req {
-        struct se_task ib_task;
         atomic_t pending;
         atomic_t ib_bio_err_cnt;
 } ____cacheline_aligned;
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 46eb017287a6..4ce2cf642fce 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -663,22 +663,12 @@ static void pscsi_free_device(void *p)
         kfree(pdv);
 }
 
-static inline struct pscsi_plugin_task *PSCSI_TASK(struct se_task *task)
+static int pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg)
 {
-        return container_of(task, struct pscsi_plugin_task, pscsi_task);
-}
-
-
-/*      pscsi_transport_complete():
- *
- *
- */
-static int pscsi_transport_complete(struct se_task *task)
-{
-        struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr;
+        struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
         struct scsi_device *sd = pdv->pdv_sd;
         int result;
-        struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+        struct pscsi_plugin_task *pt = cmd->priv;
         unsigned char *cdb = &pt->pscsi_cdb[0];
 
         result = pt->pscsi_result;
@@ -688,12 +678,11 @@ static int pscsi_transport_complete(struct se_task *task)
          */
         if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
              (status_byte(result) << 1) == SAM_STAT_GOOD) {
-                if (!task->task_se_cmd->se_deve)
+                if (!cmd->se_deve)
                         goto after_mode_sense;
 
-                if (task->task_se_cmd->se_deve->lun_flags &
-                                TRANSPORT_LUNFLAGS_READ_ONLY) {
-                        unsigned char *buf = transport_kmap_data_sg(task->task_se_cmd);
+                if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) {
+                        unsigned char *buf = transport_kmap_data_sg(cmd);
 
                         if (cdb[0] == MODE_SENSE_10) {
                                 if (!(buf[3] & 0x80))
@@ -703,7 +692,7 @@ static int pscsi_transport_complete(struct se_task *task)
                                         buf[2] |= 0x80;
                         }
 
-                        transport_kunmap_data_sg(task->task_se_cmd);
+                        transport_kunmap_data_sg(cmd);
                 }
         }
 after_mode_sense:
@@ -722,7 +711,6 @@ after_mode_sense:
         if (((cdb[0] == MODE_SELECT) || (cdb[0] == MODE_SELECT_10)) &&
               (status_byte(result) << 1) == SAM_STAT_GOOD) {
                 unsigned char *buf;
-                struct scatterlist *sg = task->task_sg;
                 u16 bdl;
                 u32 blocksize;
 
@@ -757,35 +745,6 @@ after_mode_select:
         return 0;
 }
 
-static struct se_task *
-pscsi_alloc_task(unsigned char *cdb)
-{
-        struct pscsi_plugin_task *pt;
-
-        /*
-         * Dynamically alloc cdb space, since it may be larger than
-         * TCM_MAX_COMMAND_SIZE
-         */
-        pt = kzalloc(sizeof(*pt) + scsi_command_size(cdb), GFP_KERNEL);
-        if (!pt) {
-                pr_err("Unable to allocate struct pscsi_plugin_task\n");
-                return NULL;
-        }
-
-        return &pt->pscsi_task;
-}
-
-static void pscsi_free_task(struct se_task *task)
-{
-        struct pscsi_plugin_task *pt = PSCSI_TASK(task);
-
-        /*
-         * We do not release the bio(s) here associated with this task, as
-         * this is handled by bio_put() and pscsi_bi_endio().
-         */
-        kfree(pt);
-}
-
 enum {
         Opt_scsi_host_id, Opt_scsi_channel_id, Opt_scsi_target_id,
         Opt_scsi_lun_id, Opt_err
@@ -958,26 +917,25 @@ static inline struct bio *pscsi_get_bio(int sg_num)
         return bio;
 }
 
-static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg,
+static int pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents, enum dma_data_direction data_direction,
                 struct bio **hbio)
 {
-        struct se_cmd *cmd = task->task_se_cmd;
-        struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr;
-        u32 task_sg_num = task->task_sg_nents;
+        struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
         struct bio *bio = NULL, *tbio = NULL;
         struct page *page;
         struct scatterlist *sg;
         u32 data_len = cmd->data_length, i, len, bytes, off;
-        int nr_pages = (cmd->data_length + task_sg[0].offset +
+        int nr_pages = (cmd->data_length + sgl[0].offset +
                         PAGE_SIZE - 1) >> PAGE_SHIFT;
         int nr_vecs = 0, rc;
-        int rw = (task->task_data_direction == DMA_TO_DEVICE);
+        int rw = (data_direction == DMA_TO_DEVICE);
 
         *hbio = NULL;
 
         pr_debug("PSCSI: nr_pages: %d\n", nr_pages);
 
-        for_each_sg(task_sg, sg, task_sg_num, i) {
+        for_each_sg(sgl, sg, sgl_nents, i) {
                 page = sg_page(sg);
                 off = sg->offset;
                 len = sg->length;
@@ -1009,7 +967,7 @@ static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg,
                                  * Set *hbio pointer to handle the case:
                                  * nr_pages > BIO_MAX_PAGES, where additional
                                  * bios need to be added to complete a given
-                                 * struct se_task
+                                 * command.
                                  */
                                 if (!*hbio)
                                         *hbio = tbio = bio;
@@ -1049,7 +1007,7 @@ static int pscsi_map_sg(struct se_task *task, struct scatterlist *task_sg,
                 }
         }
 
-        return task->task_sg_nents;
+        return sgl_nents;
 fail:
         while (*hbio) {
                 bio = *hbio;
@@ -1061,53 +1019,61 @@ fail:
         return -ENOMEM;
 }
 
-static int pscsi_do_task(struct se_task *task)
+static int pscsi_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents, enum dma_data_direction data_direction)
 {
-        struct se_cmd *cmd = task->task_se_cmd;
-        struct pscsi_dev_virt *pdv = task->task_se_cmd->se_dev->dev_ptr;
-        struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+        struct pscsi_dev_virt *pdv = cmd->se_dev->dev_ptr;
+        struct pscsi_plugin_task *pt;
         struct request *req;
         struct bio *hbio;
         int ret;
 
+        /*
+         * Dynamically alloc cdb space, since it may be larger than
+         * TCM_MAX_COMMAND_SIZE
+         */
+        pt = kzalloc(sizeof(*pt) + scsi_command_size(cmd->t_task_cdb), GFP_KERNEL);
+        if (!pt) {
+                cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+                return -ENOMEM;
+        }
+        cmd->priv = pt;
+
         memcpy(pt->pscsi_cdb, cmd->t_task_cdb,
                 scsi_command_size(cmd->t_task_cdb));
 
-        if (task->task_se_cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) {
+        if (cmd->se_cmd_flags & SCF_SCSI_NON_DATA_CDB) {
                 req = blk_get_request(pdv->pdv_sd->request_queue,
-                                (task->task_data_direction == DMA_TO_DEVICE),
+                                (data_direction == DMA_TO_DEVICE),
                                 GFP_KERNEL);
                 if (!req || IS_ERR(req)) {
                         pr_err("PSCSI: blk_get_request() failed: %ld\n",
                                         req ? IS_ERR(req) : -ENOMEM);
                         cmd->scsi_sense_reason =
                                 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-                        return -ENODEV;
+                        goto fail;
                 }
         } else {
                 BUG_ON(!cmd->data_length);
 
-                /*
-                 * Setup the main struct request for the task->task_sg[] payload
-                 */
-                ret = pscsi_map_sg(task, task->task_sg, &hbio);
+                ret = pscsi_map_sg(cmd, sgl, sgl_nents, data_direction, &hbio);
                 if (ret < 0) {
                         cmd->scsi_sense_reason =
                                 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-                        return ret;
+                        goto fail;
                 }
 
                 req = blk_make_request(pdv->pdv_sd->request_queue, hbio,
                                        GFP_KERNEL);
                 if (IS_ERR(req)) {
                         pr_err("pSCSI: blk_make_request() failed\n");
-                        goto fail;
+                        goto fail_free_bio;
                 }
         }
 
         req->cmd_type = REQ_TYPE_BLOCK_PC;
         req->end_io = pscsi_req_done;
-        req->end_io_data = task;
+        req->end_io_data = cmd;
         req->cmd_len = scsi_command_size(pt->pscsi_cdb);
         req->cmd = &pt->pscsi_cdb[0];
         req->sense = &pt->pscsi_sense[0];
@@ -1119,12 +1085,12 @@ static int pscsi_do_task(struct se_task *task)
         req->retries = PS_RETRY;
 
         blk_execute_rq_nowait(pdv->pdv_sd->request_queue, NULL, req,
-                        (task->task_se_cmd->sam_task_attr == MSG_HEAD_TAG),
+                        (cmd->sam_task_attr == MSG_HEAD_TAG),
                         pscsi_req_done);
 
         return 0;
 
-fail:
+fail_free_bio:
         while (hbio) {
                 struct bio *bio = hbio;
                 hbio = hbio->bi_next;
@@ -1132,16 +1098,14 @@ fail:
                 bio_endio(bio, 0);      /* XXX: should be error */
         }
         cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
+fail:
+        kfree(pt);
         return -ENOMEM;
 }
 
-/*      pscsi_get_sense_buffer():
- *
- *
- */
-static unsigned char *pscsi_get_sense_buffer(struct se_task *task)
+static unsigned char *pscsi_get_sense_buffer(struct se_cmd *cmd)
 {
-        struct pscsi_plugin_task *pt = PSCSI_TASK(task);
+        struct pscsi_plugin_task *pt = cmd->priv;
 
         return pt->pscsi_sense;
 }
@@ -1181,48 +1145,36 @@ static sector_t pscsi_get_blocks(struct se_device *dev)
         return 0;
 }
 
-/*      pscsi_handle_SAM_STATUS_failures():
- *
- *
- */
-static inline void pscsi_process_SAM_status(
-        struct se_task *task,
-        struct pscsi_plugin_task *pt)
+static void pscsi_req_done(struct request *req, int uptodate)
 {
-        task->task_scsi_status = status_byte(pt->pscsi_result);
-        if (task->task_scsi_status) {
-                task->task_scsi_status <<= 1;
-                pr_debug("PSCSI Status Byte exception at task: %p CDB:"
-                        " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0],
+        struct se_cmd *cmd = req->end_io_data;
+        struct pscsi_plugin_task *pt = cmd->priv;
+
+        pt->pscsi_result = req->errors;
+        pt->pscsi_resid = req->resid_len;
+
+        cmd->scsi_status = status_byte(pt->pscsi_result) << 1;
+        if (cmd->scsi_status) {
+                pr_debug("PSCSI Status Byte exception at cmd: %p CDB:"
+                        " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
                         pt->pscsi_result);
         }
 
         switch (host_byte(pt->pscsi_result)) {
         case DID_OK:
-                transport_complete_task(task, (!task->task_scsi_status));
+                target_complete_cmd(cmd, cmd->scsi_status);
                 break;
         default:
-                pr_debug("PSCSI Host Byte exception at task: %p CDB:"
-                        " 0x%02x Result: 0x%08x\n", task, pt->pscsi_cdb[0],
+                pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"
+                        " 0x%02x Result: 0x%08x\n", cmd, pt->pscsi_cdb[0],
                         pt->pscsi_result);
-                task->task_scsi_status = SAM_STAT_CHECK_CONDITION;
-                task->task_se_cmd->scsi_sense_reason =
-                                        TCM_UNSUPPORTED_SCSI_OPCODE;
-                transport_complete_task(task, 0);
+                cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
+                target_complete_cmd(cmd, SAM_STAT_CHECK_CONDITION);
                 break;
         }
-}
 
-static void pscsi_req_done(struct request *req, int uptodate)
-{
-        struct se_task *task = req->end_io_data;
-        struct pscsi_plugin_task *pt = PSCSI_TASK(task);
-
-        pt->pscsi_result = req->errors;
-        pt->pscsi_resid = req->resid_len;
-
-        pscsi_process_SAM_status(task, pt);
         __blk_put_request(req->q, req);
+        kfree(pt);
 }
 
 static struct se_subsystem_api pscsi_template = {
@@ -1236,9 +1188,7 @@ static struct se_subsystem_api pscsi_template = {
         .create_virtdevice      = pscsi_create_virtdevice,
         .free_device            = pscsi_free_device,
         .transport_complete     = pscsi_transport_complete,
-        .alloc_task             = pscsi_alloc_task,
-        .do_task                = pscsi_do_task,
-        .free_task              = pscsi_free_task,
+        .execute_cmd            = pscsi_execute_cmd,
         .check_configfs_dev_params = pscsi_check_configfs_dev_params,
         .set_configfs_dev_params = pscsi_set_configfs_dev_params,
         .show_configfs_dev_params = pscsi_show_configfs_dev_params,
diff --git a/drivers/target/target_core_pscsi.h b/drivers/target/target_core_pscsi.h
index 43f1c419e8e5..bc1e5e11eca0 100644
--- a/drivers/target/target_core_pscsi.h
+++ b/drivers/target/target_core_pscsi.h
@@ -22,7 +22,6 @@
 #include <linux/kobject.h>
 
 struct pscsi_plugin_task {
-        struct se_task pscsi_task;
         unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE];
         int     pscsi_direction;
         int     pscsi_result;
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index c6ce46891be9..d0ceb873c0e5 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -266,12 +266,6 @@ static void rd_free_device(void *p)
         kfree(rd_dev);
 }
 
-static struct se_task *
-rd_alloc_task(unsigned char *cdb)
-{
-        return kzalloc(sizeof(struct se_task), GFP_KERNEL);
-}
-
 static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
 {
         u32 i;
@@ -290,9 +284,10 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
         return NULL;
 }
 
-static int rd_do_task(struct se_task *task)
+static int rd_execute_cmd(struct se_cmd *cmd, struct scatterlist *sgl,
+                u32 sgl_nents, enum dma_data_direction data_direction)
 {
-        struct se_device *se_dev = task->task_se_cmd->se_dev;
+        struct se_device *se_dev = cmd->se_dev;
         struct rd_dev *dev = se_dev->dev_ptr;
         struct rd_dev_sg_table *table;
         struct scatterlist *rd_sg;
@@ -303,11 +298,10 @@ static int rd_do_task(struct se_task *task)
         u32 src_len;
         u64 tmp;
 
-        tmp = task->task_se_cmd->t_task_lba *
-                se_dev->se_sub_dev->se_dev_attrib.block_size;
+        tmp = cmd->t_task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size;
         rd_offset = do_div(tmp, PAGE_SIZE);
         rd_page = tmp;
-        rd_size = task->task_se_cmd->data_length;
+        rd_size = cmd->data_length;
 
         table = rd_get_sg_table(dev, rd_page);
         if (!table)
@@ -317,14 +311,12 @@ static int rd_do_task(struct se_task *task)
 
         pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n",
                         dev->rd_dev_id,
-                        task->task_data_direction == DMA_FROM_DEVICE ?
-                                "Read" : "Write",
-                        task->task_se_cmd->t_task_lba,
-                        rd_size, rd_page, rd_offset);
+                        data_direction == DMA_FROM_DEVICE ? "Read" : "Write",
+                        cmd->t_task_lba, rd_size, rd_page, rd_offset);
 
         src_len = PAGE_SIZE - rd_offset;
-        sg_miter_start(&m, task->task_sg, task->task_sg_nents,
-                        task->task_data_direction == DMA_FROM_DEVICE ?
+        sg_miter_start(&m, sgl, sgl_nents,
+                        data_direction == DMA_FROM_DEVICE ?
                                 SG_MITER_TO_SG : SG_MITER_FROM_SG);
         while (rd_size) {
                 u32 len;
@@ -336,7 +328,7 @@ static int rd_do_task(struct se_task *task)
 
                 rd_addr = sg_virt(rd_sg) + rd_offset;
 
-                if (task->task_data_direction == DMA_FROM_DEVICE)
+                if (data_direction == DMA_FROM_DEVICE)
                         memcpy(m.addr, rd_addr, len);
                 else
                         memcpy(rd_addr, m.addr, len);
@@ -371,16 +363,10 @@ static int rd_do_task(struct se_task *task)
         }
         sg_miter_stop(&m);
 
-        task->task_scsi_status = GOOD;
-        transport_complete_task(task, 1);
+        target_complete_cmd(cmd, SAM_STAT_GOOD);
         return 0;
 }
 
-static void rd_free_task(struct se_task *task)
-{
-        kfree(task);
-}
-
 enum {
         Opt_rd_pages, Opt_err
 };
@@ -482,9 +468,7 @@ static struct se_subsystem_api rd_mcp_template = {
         .allocate_virtdevice    = rd_allocate_virtdevice,
         .create_virtdevice      = rd_create_virtdevice,
         .free_device            = rd_free_device,
-        .alloc_task             = rd_alloc_task,
-        .do_task                = rd_do_task,
-        .free_task              = rd_free_task,
+        .execute_cmd            = rd_execute_cmd,
         .check_configfs_dev_params = rd_check_configfs_dev_params,
         .set_configfs_dev_params = rd_set_configfs_dev_params,
         .show_configfs_dev_params = rd_show_configfs_dev_params,
diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index e0ffbdc4a486..6e2378a88bda 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -374,13 +374,11 @@ static void core_tmr_drain_cmd_list(
         struct se_queue_obj *qobj = &dev->dev_queue_obj;
         struct se_cmd *cmd, *tcmd;
         unsigned long flags;
+
         /*
-         * Release all commands remaining in the struct se_device cmd queue.
+         * Release all commands remaining in the per-device command queue.
          *
-         * This follows the same logic as above for the struct se_device
-         * struct se_task state list, where commands are returned with
-         * TASK_ABORTED status, if there is an outstanding $FABRIC_MOD
-         * reference, otherwise the struct se_cmd is released.
+         * This follows the same logic as above for the state list.
          */
         spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
         list_for_each_entry_safe(cmd, tcmd, &qobj->qobj_list, se_queue_node) {
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 4ee33954697e..47669c6d9175 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -72,7 +72,6 @@ static int __transport_execute_tasks(struct se_device *dev, struct se_cmd *);
 static void transport_complete_task_attr(struct se_cmd *cmd);
 static void transport_handle_queue_full(struct se_cmd *cmd,
                 struct se_device *dev);
-static void transport_free_dev_tasks(struct se_cmd *cmd);
 static int transport_generic_get_mem(struct se_cmd *cmd);
 static void transport_put_cmd(struct se_cmd *cmd);
 static void transport_remove_cmd_from_queue(struct se_cmd *cmd);
@@ -662,28 +661,6 @@ static void transport_remove_cmd_from_queue(struct se_cmd *cmd)
         spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
 }
 
-/*
- * Completion function used by TCM subsystem plugins (such as FILEIO)
- * for queueing up response from struct se_subsystem_api->do_task()
- */
-void transport_complete_sync_cache(struct se_cmd *cmd, int good)
-{
-        struct se_task *task = cmd->t_task;
-
-        if (good) {
-                cmd->scsi_status = SAM_STAT_GOOD;
-                task->task_scsi_status = GOOD;
-        } else {
-                task->task_scsi_status = SAM_STAT_CHECK_CONDITION;
-                task->task_se_cmd->scsi_sense_reason =
-                                TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
-
-        }
-
-        transport_complete_task(task, good);
-}
-EXPORT_SYMBOL(transport_complete_sync_cache);
-
 static void target_complete_failure_work(struct work_struct *work)
 {
         struct se_cmd *cmd = container_of(work, struct se_cmd, work);
@@ -691,35 +668,28 @@ static void target_complete_failure_work(struct work_struct *work)
         transport_generic_request_failure(cmd);
 }
 
-/*      transport_complete_task():
- *
- *      Called from interrupt and non interrupt context depending
- *      on the transport plugin.
- */
-void transport_complete_task(struct se_task *task, int success)
+void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
 {
-        struct se_cmd *cmd = task->task_se_cmd;
         struct se_device *dev = cmd->se_dev;
+        int success = scsi_status == GOOD;
         unsigned long flags;
 
+        cmd->scsi_status = scsi_status;
+
+
         spin_lock_irqsave(&cmd->t_state_lock, flags);
         cmd->transport_state &= ~CMD_T_BUSY;
 
-        /*
-         * See if any sense data exists, if so set the TASK_SENSE flag.
-         * Also check for any other post completion work that needs to be
-         * done by the plugins.
-         */
         if (dev && dev->transport->transport_complete) {
-                if (dev->transport->transport_complete(task) != 0) {
+                if (dev->transport->transport_complete(cmd,
+                                cmd->t_data_sg) != 0) {
                         cmd->se_cmd_flags |= SCF_TRANSPORT_TASK_SENSE;
                         success = 1;
                 }
         }
 
         /*
-         * See if we are waiting for outstanding struct se_task
-         * to complete for an exception condition
+         * See if we are waiting to complete for an exception condition.
          */
         if (cmd->transport_state & CMD_T_REQUEST_STOP) {
                 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
@@ -730,15 +700,11 @@ void transport_complete_task(struct se_task *task, int success)
         if (!success)
                 cmd->transport_state |= CMD_T_FAILED;
 
-        /*
-         * Decrement the outstanding t_task_cdbs_left count.  The last
-         * struct se_task from struct se_cmd will complete itself into the
-         * device queue depending upon int success.
-         */
         if (!atomic_dec_and_test(&cmd->t_task_cdbs_left)) {
                 spin_unlock_irqrestore(&cmd->t_state_lock, flags);
                 return;
         }
+
         /*
          * Check for case where an explict ABORT_TASK has been received
          * and transport_wait_for_tasks() will be waiting for completion..
@@ -761,15 +727,6 @@ void transport_complete_task(struct se_task *task, int success)
 
         queue_work(target_completion_wq, &cmd->work);
 }
-EXPORT_SYMBOL(transport_complete_task);
-
-void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
-{
-        struct se_task *task = cmd->t_task;
-
-        task->task_scsi_status = scsi_status;
-        transport_complete_task(task, scsi_status == GOOD);
-}
 EXPORT_SYMBOL(target_complete_cmd);
 
 static void target_add_to_state_list(struct se_cmd *cmd)
@@ -2076,8 +2033,10 @@ check_depth:
 
         if (cmd->execute_cmd)
                 error = cmd->execute_cmd(cmd);
-        else
-                error = dev->transport->do_task(cmd->t_task);
+        else {
+                error = dev->transport->execute_cmd(cmd, cmd->t_data_sg,
+                                cmd->t_data_nents, cmd->data_direction);
+        }
 
         if (error != 0) {
                 spin_lock_irqsave(&cmd->t_state_lock, flags);
@@ -2312,7 +2271,6 @@ static int transport_get_sense_data(struct se_cmd *cmd)
 {
         unsigned char *buffer = cmd->sense_buffer, *sense_buffer = NULL;
         struct se_device *dev = cmd->se_dev;
-        struct se_task *task = NULL;
         unsigned long flags;
         u32 offset = 0;
 
@@ -2327,9 +2285,6 @@ static int transport_get_sense_data(struct se_cmd *cmd)
                 return 0;
         }
 
-        if (!cmd->t_task)
-                goto out;
-
         if (!(cmd->se_cmd_flags & SCF_TRANSPORT_TASK_SENSE))
                 goto out;
 
@@ -2338,19 +2293,19 @@ static int transport_get_sense_data(struct se_cmd *cmd)
                 goto out;
         }
 
-        sense_buffer = dev->transport->get_sense_buffer(task);
+        sense_buffer = dev->transport->get_sense_buffer(cmd);
         if (!sense_buffer) {
-                pr_err("ITT[0x%08x]_TASK[%p]: Unable to locate"
+                pr_err("ITT 0x%08x cmd %p: Unable to locate"
                         " sense buffer for task with sense\n",
-                        cmd->se_tfo->get_task_tag(cmd), task);
+                        cmd->se_tfo->get_task_tag(cmd), cmd);
                 goto out;
         }
+
         spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
         offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER);
 
         memcpy(&buffer[offset], sense_buffer, TRANSPORT_SENSE_BUFFER);
-        cmd->scsi_status = task->task_scsi_status;
 
         /* Automatically padded */
         cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
@@ -3199,10 +3154,6 @@ static void target_complete_ok_work(struct work_struct *work)
                 if (transport_get_sense_data(cmd) < 0)
                         reason = TCM_NON_EXISTENT_LUN;
 
-                /*
-                 * Only set when an struct se_task->task_scsi_status returned
-                 * a non GOOD status.
-                 */
                 if (cmd->scsi_status) {
                         ret = transport_send_check_condition_and_sense(
                                         cmd, reason, 1);
@@ -3277,15 +3228,6 @@ queue_full:
         transport_handle_queue_full(cmd, cmd->se_dev);
 }
 
-static void transport_free_dev_tasks(struct se_cmd *cmd)
-{
-        struct se_task *task;
-
-        task = cmd->t_task;
-        if (task && !(cmd->transport_state & CMD_T_BUSY))
-                cmd->se_dev->transport->free_task(task);
-}
-
 static inline void transport_free_sgl(struct scatterlist *sgl, int nents)
 {
         struct scatterlist *sg;
@@ -3346,7 +3288,6 @@ static void transport_release_cmd(struct se_cmd *cmd)
 static void transport_put_cmd(struct se_cmd *cmd)
 {
         unsigned long flags;
-        int free_tasks = 0;
 
         spin_lock_irqsave(&cmd->t_state_lock, flags);
         if (atomic_read(&cmd->t_fe_count)) {
@@ -3362,13 +3303,9 @@ static void transport_put_cmd(struct se_cmd *cmd)
         if (cmd->transport_state & CMD_T_DEV_ACTIVE) {
                 cmd->transport_state &= ~CMD_T_DEV_ACTIVE;
                 target_remove_from_state_list(cmd);
-                free_tasks = 1;
         }
         spin_unlock_irqrestore(&cmd->t_state_lock, flags);
 
-        if (free_tasks != 0)
-                transport_free_dev_tasks(cmd);
-
         transport_free_pages(cmd);
         transport_release_cmd(cmd);
         return;
@@ -3526,7 +3463,6 @@ out:
 int transport_generic_new_cmd(struct se_cmd *cmd)
 {
         struct se_device *dev = cmd->se_dev;
-        struct se_task *task;
         int ret = 0;
 
         /*
@@ -3572,19 +3508,6 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
                         attr->max_sectors);
         }
 
-        task = dev->transport->alloc_task(cmd->t_task_cdb);
-        if (!task) {
-                pr_err("Unable to allocate struct se_task\n");
-                goto out_fail;
-        }
-
-        task->task_se_cmd = cmd;
-        task->task_data_direction = cmd->data_direction;
-        task->task_sg = cmd->t_data_sg;
-        task->task_sg_nents = cmd->t_data_nents;
-
-        cmd->t_task = task;
-
         atomic_inc(&cmd->t_fe_count);
         atomic_inc(&cmd->t_se_count);
 
@@ -3592,19 +3515,17 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
         atomic_set(&cmd->t_task_cdbs_ex_left, 1);
 
         /*
-         * For WRITEs, let the fabric know its buffer is ready..
-         * This WRITE struct se_cmd (and all of its associated struct se_task's)
-         * will be added to the struct se_device execution queue after its WRITE
-         * data has arrived. (ie: It gets handled by the transport processing
-         * thread a second time)
+         * For WRITEs, let the fabric know its buffer is ready.
+         *
+         * The command will be added to the execution queue after its write
+         * data has arrived.
          */
         if (cmd->data_direction == DMA_TO_DEVICE) {
                 target_add_to_state_list(cmd);
                 return transport_generic_write_pending(cmd);
         }
         /*
-         * Everything else but a WRITE, add the struct se_cmd's struct se_task's
-         * to the execution queue.
+         * Everything else but a WRITE, add the command to the execution queue.
          */
         transport_execute_tasks(cmd);
         return 0;
@@ -3691,8 +3612,6 @@ void transport_generic_free_cmd(struct se_cmd *cmd, int wait_for_tasks)
                 if (cmd->se_lun)
                         transport_lun_remove_cmd(cmd);
 
-                transport_free_dev_tasks(cmd);
-
                 transport_put_cmd(cmd);
         }
 }
@@ -3832,7 +3751,6 @@ EXPORT_SYMBOL(target_wait_for_sess_cmds);
  */
 static int transport_lun_wait_for_tasks(struct se_cmd *cmd, struct se_lun *lun)
 {
-        struct se_task *task = cmd->t_task;
         unsigned long flags;
         int ret = 0;
 
@@ -3944,7 +3862,6 @@ static void __transport_clear_lun_from_sessions(struct se_lun *lun)
                 target_remove_from_state_list(cmd);
                 spin_unlock_irqrestore(&cmd->t_state_lock, cmd_flags);
 
-                transport_free_dev_tasks(cmd);
                 /*
                  * The Storage engine stopped this struct se_cmd before it was
                  * send to the fabric frontend for delivery back to the