blk_end_request: changing scsi (take 4)

This patch converts scsi mid-layer to use blk_end_request interfaces.
Related 'uptodate' arguments are converted to 'error'.

As a result, the interface of internal function, scsi_end_request(),
is changed.

Cc: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 11 insertions, 20 deletions

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 4cf902efbdb..f44ab801119 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -634,7 +634,7 @@ void scsi_run_host_queues(struct Scsi_Host *shost)
  *              of upper level post-processing and scsi_io_completion).
  *
  * Arguments:   cmd      - command that is complete.
- *              uptodate - 1 if I/O indicates success, <= 0 for I/O error.
+ *              error    - 0 if I/O indicates success, < 0 for I/O error.
  *              bytes    - number of bytes of completed I/O
  *              requeue  - indicates whether we should requeue leftovers.
  *
@@ -649,26 +649,25 @@ void scsi_run_host_queues(struct Scsi_Host *shost)
  *              at some point during this call.
  * Notes:       If cmd was requeued, upon return it will be a stale pointer.
  */
-static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate,
+static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int error,
                                           int bytes, int requeue)
 {
         struct request_queue *q = cmd->device->request_queue;
         struct request *req = cmd->request;
-        unsigned long flags;
 
         /*
          * If there are blocks left over at the end, set up the command
          * to queue the remainder of them.
          */
-        if (end_that_request_chunk(req, uptodate, bytes)) {
+        if (blk_end_request(req, error, bytes)) {
                 int leftover = (req->hard_nr_sectors << 9);
 
                 if (blk_pc_request(req))
                         leftover = req->data_len;
 
                 /* kill remainder if no retrys */
-                if (!uptodate && blk_noretry_request(req))
-                        end_that_request_chunk(req, 0, leftover);
+                if (error && blk_noretry_request(req))
+                        blk_end_request(req, error, leftover);
                 else {
                         if (requeue) {
                                 /*
@@ -683,14 +682,6 @@ static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate,
                 }
         }
 
-        add_disk_randomness(req->rq_disk);
-
-        spin_lock_irqsave(q->queue_lock, flags);
-        if (blk_rq_tagged(req))
-                blk_queue_end_tag(q, req);
-        end_that_request_last(req, uptodate);
-        spin_unlock_irqrestore(q->queue_lock, flags);
-
         /*
          * This will goose the queue request function at the end, so we don't
          * need to worry about launching another command.
@@ -987,7 +978,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
          * are leftovers and there is some kind of error
          * (result != 0), retry the rest.
          */
-        if (scsi_end_request(cmd, 1, good_bytes, result == 0) == NULL)
+        if (scsi_end_request(cmd, 0, good_bytes, result == 0) == NULL)
                 return;
 
         /* good_bytes = 0, or (inclusive) there were leftovers and
@@ -1001,7 +992,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                                  * and quietly refuse further access.
                                  */
                                 cmd->device->changed = 1;
-                                scsi_end_request(cmd, 0, this_count, 1);
+                                scsi_end_request(cmd, -EIO, this_count, 1);
                                 return;
                         } else {
                                 /* Must have been a power glitch, or a
@@ -1033,7 +1024,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                                 scsi_requeue_command(q, cmd);
                                 return;
                         } else {
-                                scsi_end_request(cmd, 0, this_count, 1);
+                                scsi_end_request(cmd, -EIO, this_count, 1);
                                 return;
                         }
                         break;
@@ -1061,7 +1052,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                                                          "Device not ready",
                                                          &sshdr);
 
-                        scsi_end_request(cmd, 0, this_count, 1);
+                        scsi_end_request(cmd, -EIO, this_count, 1);
                         return;
                 case VOLUME_OVERFLOW:
                         if (!(req->cmd_flags & REQ_QUIET)) {
@@ -1071,7 +1062,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                                 scsi_print_sense("", cmd);
                         }
                         /* See SSC3rXX or current. */
-                        scsi_end_request(cmd, 0, this_count, 1);
+                        scsi_end_request(cmd, -EIO, this_count, 1);
                         return;
                 default:
                         break;
@@ -1092,7 +1083,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                                 scsi_print_sense("", cmd);
                 }
         }
-        scsi_end_request(cmd, 0, this_count, !result);
+        scsi_end_request(cmd, -EIO, this_count, !result);
 }
 
 /*