ide: convert do_rw_taskfile() to use ->data_phase

* Use task->data_phase in do_rw_taskfile() to decide what to do.

* task->prehandler is only used by TASKFILE[_MULTI]_OUT so just
  use pre_task_out_intr() directly and remove no longer needed
  'prehandler' field from ide_task_t.

* Remove no longer needed ide_pre_handler_t type.

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 1a34edb..5f6d01a 100644 (file)
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -170,23 +170,25 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 
        ide_tf_load(drive, task);
 
-       if (task->handler != NULL) {
-               if (task->prehandler != NULL) {
-                       hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
-                       ndelay(400);    /* FIXME */
-                       return task->prehandler(drive, task->rq);
-               }
+       switch (task->data_phase) {
+       case TASKFILE_MULTI_OUT:
+       case TASKFILE_OUT:
+               hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
+               ndelay(400);    /* FIXME */
+               return pre_task_out_intr(drive, task->rq);
+       case TASKFILE_MULTI_IN:
+       case TASKFILE_IN:
+       case TASKFILE_NO_DATA:
                ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
                return ide_started;
-       }
-
-       if (task_dma_ok(task) && drive->using_dma && !hwif->dma_setup(drive)) {
+       default:
+               if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
+                   hwif->dma_setup(drive))
+                       return ide_stopped;
                hwif->dma_exec_cmd(drive, tf->command);
                hwif->dma_start(drive);
                return ide_started;
        }
-
-       return ide_stopped;
 }
 
 /*
@@ -665,7 +667,6 @@ int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
                        }
                        /* fall through */
                case TASKFILE_OUT:
-                       args.prehandler = &pre_task_out_intr;
                        args.handler = &task_out_intr;
                        /* fall through */
                case TASKFILE_OUT_DMAQ:

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 8494475..2c28fb7 100644 (file)
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -626,7 +626,6 @@ typedef struct hwif_s {
 /*
  *  internal ide interrupt handler type
  */
-typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 typedef int (ide_expiry_t)(ide_drive_t *);
 
@@ -950,7 +949,6 @@ typedef struct ide_task_s {
        };
        u32                     tf_flags;
        int                     data_phase;
-       ide_pre_handler_t       *prehandler;
        ide_handler_t           *handler;
        struct request          *rq;            /* copy of request */
        void                    *special;       /* valid_t generally */