ide: remove 'handler' field from ide_task_t (take 2)

* Add IDE_TFLAG_CUSTOM_HANDLER taskfile flag and use it for internal requests
  which require custom handlers.  Check the flag in do_rw_taskfile() and set
  handler accordingly.

* Cleanup ide_init_{specify,restore,setmult}_cmd() and rename it to
  ide_tf_set_{specify,restore,setmult}_cmd().

* Make {set_geometry,recal,set_multmode}_intr() static.

* Remove no longer needed 'handler' field from ide_task_t.

v2:
* 'handler' in do_rw_taskfile() must be set to NULL initially.

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>

2 files changed, 37 insertions, 32 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 18ac1bd0811f..48c38b68bd36 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -637,32 +637,26 @@ static ide_startstop_t drive_cmd_intr (ide_drive_t *drive)
         return ide_stopped;
 }
 
-static void ide_init_specify_cmd(ide_drive_t *drive, ide_task_t *task)
+static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
 {
-        task->tf.nsect   = drive->sect;
-        task->tf.lbal    = drive->sect;
-        task->tf.lbam    = drive->cyl;
-        task->tf.lbah    = drive->cyl >> 8;
-        task->tf.device  = ((drive->head - 1) | drive->select.all) & ~ATA_LBA;
-        task->tf.command = WIN_SPECIFY;
-
-        task->handler = &set_geometry_intr;
+        tf->nsect   = drive->sect;
+        tf->lbal    = drive->sect;
+        tf->lbam    = drive->cyl;
+        tf->lbah    = drive->cyl >> 8;
+        tf->device  = ((drive->head - 1) | drive->select.all) & ~ATA_LBA;
+        tf->command = WIN_SPECIFY;
 }
 
-static void ide_init_restore_cmd(ide_drive_t *drive, ide_task_t *task)
+static void ide_tf_set_restore_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
 {
-        task->tf.nsect   = drive->sect;
-        task->tf.command = WIN_RESTORE;
-
-        task->handler = &recal_intr;
+        tf->nsect   = drive->sect;
+        tf->command = WIN_RESTORE;
 }
 
-static void ide_init_setmult_cmd(ide_drive_t *drive, ide_task_t *task)
+static void ide_tf_set_setmult_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
 {
-        task->tf.nsect   = drive->mult_req;
-        task->tf.command = WIN_SETMULT;
-
-        task->handler = &set_multmode_intr;
+        tf->nsect   = drive->mult_req;
+        tf->command = WIN_SETMULT;
 }
 
 static ide_startstop_t ide_disk_special(ide_drive_t *drive)
@@ -675,15 +669,15 @@ static ide_startstop_t ide_disk_special(ide_drive_t *drive)
 
         if (s->b.set_geometry) {
                 s->b.set_geometry = 0;
-                ide_init_specify_cmd(drive, &args);
+                ide_tf_set_specify_cmd(drive, &args.tf);
         } else if (s->b.recalibrate) {
                 s->b.recalibrate = 0;
-                ide_init_restore_cmd(drive, &args);
+                ide_tf_set_restore_cmd(drive, &args.tf);
         } else if (s->b.set_multmode) {
                 s->b.set_multmode = 0;
                 if (drive->mult_req > drive->id->max_multsect)
                         drive->mult_req = drive->id->max_multsect;
-                ide_init_setmult_cmd(drive, &args);
+                ide_tf_set_setmult_cmd(drive, &args.tf);
         } else if (s->all) {
                 int special = s->all;
                 s->all = 0;
@@ -691,7 +685,8 @@ static ide_startstop_t ide_disk_special(ide_drive_t *drive)
                 return ide_stopped;
         }
 
-        args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
+        args.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |
+                        IDE_TFLAG_CUSTOM_HANDLER;
 
         do_rw_taskfile(drive, &args);
 
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 835465d61f70..236f91f11a73 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -151,12 +151,15 @@ static int inline task_dma_ok(ide_task_t *task)
 }
 
 static ide_startstop_t task_no_data_intr(ide_drive_t *);
-static ide_startstop_t task_out_intr(ide_drive_t *);
+static ide_startstop_t set_geometry_intr(ide_drive_t *);
+static ide_startstop_t recal_intr(ide_drive_t *);
+static ide_startstop_t set_multmode_intr(ide_drive_t *);
 
 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 {
         ide_hwif_t *hwif        = HWIF(drive);
         struct ide_taskfile *tf = &task->tf;
+        ide_handler_t *handler = NULL;
 
         if (task->data_phase == TASKFILE_MULTI_IN ||
             task->data_phase == TASKFILE_MULTI_OUT) {
@@ -175,19 +178,26 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
         switch (task->data_phase) {
         case TASKFILE_MULTI_OUT:
         case TASKFILE_OUT:
-                task->handler = task_out_intr;
                 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:
-                task->handler = task_in_intr;
+                handler = task_in_intr;
                 /* fall-through */
         case TASKFILE_NO_DATA:
+                if (handler == NULL)
+                        handler = task_no_data_intr;
                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
-                if (task->handler == NULL)
-                        task->handler = task_no_data_intr;
-                ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
+                if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
+                        switch (tf->command) {
+                        case WIN_SPECIFY: handler = set_geometry_intr;  break;
+                        case WIN_RESTORE: handler = recal_intr;         break;
+                        case WIN_SETMULT: handler = set_multmode_intr;  break;
+                        }
+                }
+                ide_execute_command(drive, tf->command, handler,
+                                    WAIT_WORSTCASE, NULL);
                 return ide_started;
         default:
                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
@@ -202,7 +212,7 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 /*
  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
  */
-ide_startstop_t set_multmode_intr (ide_drive_t *drive)
+static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = HWIF(drive);
         u8 stat;
@@ -220,7 +230,7 @@ ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 /*
  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
  */
-ide_startstop_t set_geometry_intr (ide_drive_t *drive)
+static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = HWIF(drive);
         int retries = 5;
@@ -243,7 +253,7 @@ ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 /*
  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
  */
-ide_startstop_t recal_intr (ide_drive_t *drive)
+static ide_startstop_t recal_intr(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = HWIF(drive);
         u8 stat;