[SCSI] remove scsi_request infrastructure

With Achim patch the last user (gdth) is switched away from scsi_request
so we an kill it now.  Also disables some code in i2o_scsi that was
broken since the sg driver stopped using scsi_requests.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 0 insertions, 157 deletions

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 73994e2ac2cb..3e90ba797df2 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -63,7 +63,6 @@
 #include <scsi/scsi_eh.h>
 #include <scsi/scsi_host.h>
 #include <scsi/scsi_tcq.h>
-#include <scsi/scsi_request.h>
 
 #include "scsi_priv.h"
 #include "scsi_logging.h"
@@ -116,79 +115,6 @@ const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE] = {
 };
 EXPORT_SYMBOL(scsi_device_types);
 
-/*
- * Function:    scsi_allocate_request
- *
- * Purpose:     Allocate a request descriptor.
- *
- * Arguments:   device          - device for which we want a request
- *              gfp_mask        - allocation flags passed to kmalloc
- *
- * Lock status: No locks assumed to be held.  This function is SMP-safe.
- *
- * Returns:     Pointer to request block.
- */
-struct scsi_request *scsi_allocate_request(struct scsi_device *sdev,
-                                           gfp_t gfp_mask)
-{
-        const int offset = ALIGN(sizeof(struct scsi_request), 4);
-        const int size = offset + sizeof(struct request);
-        struct scsi_request *sreq;
-  
-        sreq = kzalloc(size, gfp_mask);
-        if (likely(sreq != NULL)) {
-                sreq->sr_request = (struct request *)(((char *)sreq) + offset);
-                sreq->sr_device = sdev;
-                sreq->sr_host = sdev->host;
-                sreq->sr_magic = SCSI_REQ_MAGIC;
-                sreq->sr_data_direction = DMA_BIDIRECTIONAL;
-        }
-
-        return sreq;
-}
-EXPORT_SYMBOL(scsi_allocate_request);
-
-void __scsi_release_request(struct scsi_request *sreq)
-{
-        struct request *req = sreq->sr_request;
-
-        /* unlikely because the tag was usually ended earlier by the
-         * mid-layer. However, for layering reasons ULD's don't end
-         * the tag of commands they generate. */
-        if (unlikely(blk_rq_tagged(req))) {
-                unsigned long flags;
-                struct request_queue *q = req->q;
-
-                spin_lock_irqsave(q->queue_lock, flags);
-                blk_queue_end_tag(q, req);
-                spin_unlock_irqrestore(q->queue_lock, flags);
-        }
-
-
-        if (likely(sreq->sr_command != NULL)) {
-                struct scsi_cmnd *cmd = sreq->sr_command;
-
-                sreq->sr_command = NULL;
-                scsi_next_command(cmd);
-        }
-}
-
-/*
- * Function:    scsi_release_request
- *
- * Purpose:     Release a request descriptor.
- *
- * Arguments:   sreq    - request to release
- *
- * Lock status: No locks assumed to be held.  This function is SMP-safe.
- */
-void scsi_release_request(struct scsi_request *sreq)
-{
-        __scsi_release_request(sreq);
-        kfree(sreq);
-}
-EXPORT_SYMBOL(scsi_release_request);
-
 struct scsi_host_cmd_pool {
         kmem_cache_t    *slab;
         unsigned int    users;
@@ -646,73 +572,6 @@ int scsi_dispatch_cmd(struct scsi_cmnd *cmd)
         return rtn;
 }
 
-/*
- * Function:    scsi_init_cmd_from_req
- *
- * Purpose:     Queue a SCSI command
- * Purpose:     Initialize a struct scsi_cmnd from a struct scsi_request
- *
- * Arguments:   cmd       - command descriptor.
- *              sreq      - Request from the queue.
- *
- * Lock status: None needed.
- *
- * Returns:     Nothing.
- *
- * Notes:       Mainly transfer data from the request structure to the
- *              command structure.  The request structure is allocated
- *              using the normal memory allocator, and requests can pile
- *              up to more or less any depth.  The command structure represents
- *              a consumable resource, as these are allocated into a pool
- *              when the SCSI subsystem initializes.  The preallocation is
- *              required so that in low-memory situations a disk I/O request
- *              won't cause the memory manager to try and write out a page.
- *              The request structure is generally used by ioctls and character
- *              devices.
- */
-void scsi_init_cmd_from_req(struct scsi_cmnd *cmd, struct scsi_request *sreq)
-{
-        sreq->sr_command = cmd;
-
-        cmd->cmd_len = sreq->sr_cmd_len;
-        cmd->use_sg = sreq->sr_use_sg;
-
-        cmd->request = sreq->sr_request;
-        memcpy(cmd->data_cmnd, sreq->sr_cmnd, sizeof(cmd->data_cmnd));
-        cmd->serial_number = 0;
-        cmd->bufflen = sreq->sr_bufflen;
-        cmd->buffer = sreq->sr_buffer;
-        cmd->retries = 0;
-        cmd->allowed = sreq->sr_allowed;
-        cmd->done = sreq->sr_done;
-        cmd->timeout_per_command = sreq->sr_timeout_per_command;
-        cmd->sc_data_direction = sreq->sr_data_direction;
-        cmd->sglist_len = sreq->sr_sglist_len;
-        cmd->underflow = sreq->sr_underflow;
-        cmd->sc_request = sreq;
-        memcpy(cmd->cmnd, sreq->sr_cmnd, sizeof(sreq->sr_cmnd));
-
-        /*
-         * Zero the sense buffer.  Some host adapters automatically request
-         * sense on error.  0 is not a valid sense code.
-         */
-        memset(cmd->sense_buffer, 0, sizeof(sreq->sr_sense_buffer));
-        cmd->request_buffer = sreq->sr_buffer;
-        cmd->request_bufflen = sreq->sr_bufflen;
-        cmd->old_use_sg = cmd->use_sg;
-        if (cmd->cmd_len == 0)
-                cmd->cmd_len = COMMAND_SIZE(cmd->cmnd[0]);
-        cmd->old_cmd_len = cmd->cmd_len;
-        cmd->sc_old_data_direction = cmd->sc_data_direction;
-        cmd->old_underflow = cmd->underflow;
-
-        /*
-         * Start the timer ticking.
-         */
-        cmd->result = 0;
-
-        SCSI_LOG_MLQUEUE(3, printk("Leaving scsi_init_cmd_from_req()\n"));
-}
 
 /*
  * Per-CPU I/O completion queue.
@@ -809,7 +668,6 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
 {
         struct scsi_device *sdev = cmd->device;
         struct Scsi_Host *shost = sdev->host;
-        struct scsi_request *sreq;
 
         scsi_device_unbusy(sdev);
 
@@ -839,21 +697,6 @@ void scsi_finish_command(struct scsi_cmnd *cmd)
          * We can get here with use_sg=0, causing a panic in the upper level
          */
         cmd->use_sg = cmd->old_use_sg;
-
-        /*
-         * If there is an associated request structure, copy the data over
-         * before we call the completion function.
-         */
-        sreq = cmd->sc_request;
-        if (sreq) {
-               sreq->sr_result = sreq->sr_command->result;
-               if (sreq->sr_result) {
-                       memcpy(sreq->sr_sense_buffer,
-                              sreq->sr_command->sense_buffer,
-                              sizeof(sreq->sr_sense_buffer));
-               }
-        }
-
         cmd->done(cmd);
 }
 EXPORT_SYMBOL(scsi_finish_command);