ide: sanitize ide*_pm_* enums

* Move ide*_pm_* enums from ide-io.c to <linux/ide.h>.

* idedisk_pm_* -> ide_pm_*

* ide_pm_state_* -> ide_pm_*

* No need to set ide_pm_* enums to the fixed values.

* Uppercase ide_pm_* enums.

* Fix/update comments.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

3 files changed, 40 insertions, 60 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 623f6c246cf5..f8d8642903da 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -132,21 +132,6 @@ int ide_end_request (ide_drive_t *drive, int uptodate, int nr_sectors)
 }
 EXPORT_SYMBOL(ide_end_request);
 
-/*
- * Power Management state machine. This one is rather trivial for now,
- * we should probably add more, like switching back to PIO on suspend
- * to help some BIOSes, re-do the door locking on resume, etc...
- */
-
-enum {
-        ide_pm_flush_cache      = ide_pm_state_start_suspend,
-        idedisk_pm_standby,
-
-        idedisk_pm_restore_pio  = ide_pm_state_start_resume,
-        idedisk_pm_idle,
-        ide_pm_restore_dma,
-};
-
 static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 stat, u8 error)
 {
         struct request_pm_state *pm = rq->data;
@@ -155,20 +140,20 @@ static void ide_complete_power_step(ide_drive_t *drive, struct request *rq, u8 s
                 return;
 
         switch (pm->pm_step) {
-        case ide_pm_flush_cache:        /* Suspend step 1 (flush cache) complete */
+        case IDE_PM_FLUSH_CACHE:        /* Suspend step 1 (flush cache) */
                 if (pm->pm_state == PM_EVENT_FREEZE)
-                        pm->pm_step = ide_pm_state_completed;
+                        pm->pm_step = IDE_PM_COMPLETED;
                 else
-                        pm->pm_step = idedisk_pm_standby;
+                        pm->pm_step = IDE_PM_STANDBY;
                 break;
-        case idedisk_pm_standby:        /* Suspend step 2 (standby) complete */
-                pm->pm_step = ide_pm_state_completed;
+        case IDE_PM_STANDBY:            /* Suspend step 2 (standby) */
+                pm->pm_step = IDE_PM_COMPLETED;
                 break;
-        case idedisk_pm_restore_pio:    /* Resume step 1 complete */
-                pm->pm_step = idedisk_pm_idle;
+        case IDE_PM_RESTORE_PIO:        /* Resume step 1 (restore PIO) */
+                pm->pm_step = IDE_PM_IDLE;
                 break;
-        case idedisk_pm_idle:           /* Resume step 2 (idle) complete */
-                pm->pm_step = ide_pm_restore_dma;
+        case IDE_PM_IDLE:               /* Resume step 2 (idle)*/
+                pm->pm_step = IDE_PM_RESTORE_DMA;
                 break;
         }
 }
@@ -181,7 +166,7 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
         memset(args, 0, sizeof(*args));
 
         switch (pm->pm_step) {
-        case ide_pm_flush_cache:        /* Suspend step 1 (flush cache) */
+        case IDE_PM_FLUSH_CACHE:        /* Suspend step 1 (flush cache) */
                 if (drive->media != ide_disk)
                         break;
                 /* Not supported? Switch to next step now. */
@@ -195,27 +180,23 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
                 else
                         args->tf.command = ATA_CMD_FLUSH;
                 goto out_do_tf;
-
-        case idedisk_pm_standby:        /* Suspend step 2 (standby) */
+        case IDE_PM_STANDBY:            /* Suspend step 2 (standby) */
                 args->tf.command = ATA_CMD_STANDBYNOW1;
                 goto out_do_tf;
-
-        case idedisk_pm_restore_pio:    /* Resume step 1 (restore PIO) */
+        case IDE_PM_RESTORE_PIO:        /* Resume step 1 (restore PIO) */
                 ide_set_max_pio(drive);
                 /*
-                 * skip idedisk_pm_idle for ATAPI devices
+                 * skip IDE_PM_IDLE for ATAPI devices
                  */
                 if (drive->media != ide_disk)
-                        pm->pm_step = ide_pm_restore_dma;
+                        pm->pm_step = IDE_PM_RESTORE_DMA;
                 else
                         ide_complete_power_step(drive, rq, 0, 0);
                 return ide_stopped;
-
-        case idedisk_pm_idle:           /* Resume step 2 (idle) */
+        case IDE_PM_IDLE:               /* Resume step 2 (idle) */
                 args->tf.command = ATA_CMD_IDLEIMMEDIATE;
                 goto out_do_tf;
-
-        case ide_pm_restore_dma:        /* Resume step 3 (restore DMA) */
+        case IDE_PM_RESTORE_DMA:        /* Resume step 3 (restore DMA) */
                 /*
                  * Right now, all we do is call ide_set_dma(drive),
                  * we could be smarter and check for current xfer_speed
@@ -229,7 +210,8 @@ static ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *
                 ide_set_dma(drive);
                 break;
         }
-        pm->pm_step = ide_pm_state_completed;
+
+        pm->pm_step = IDE_PM_COMPLETED;
         return ide_stopped;
 
 out_do_tf:
@@ -345,7 +327,7 @@ void ide_end_drive_cmd (ide_drive_t *drive, u8 stat, u8 err)
                         drive->name, rq->pm->pm_step, stat, err);
 #endif
                 ide_complete_power_step(drive, rq, stat, err);
-                if (pm->pm_step == ide_pm_state_completed)
+                if (pm->pm_step == IDE_PM_COMPLETED)
                         ide_complete_pm_request(drive, rq);
                 return;
         }
@@ -778,11 +760,11 @@ static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
         struct request_pm_state *pm = rq->data;
 
         if (blk_pm_suspend_request(rq) &&
-            pm->pm_step == ide_pm_state_start_suspend)
+            pm->pm_step == IDE_PM_START_SUSPEND)
                 /* Mark drive blocked when starting the suspend sequence. */
                 drive->dev_flags |= IDE_DFLAG_BLOCKED;
         else if (blk_pm_resume_request(rq) &&
-                 pm->pm_step == ide_pm_state_start_resume) {
+                 pm->pm_step == IDE_PM_START_RESUME) {
                 /* 
                  * The first thing we do on wakeup is to wait for BSY bit to
                  * go away (with a looong timeout) as a drive on this hwif may
@@ -862,7 +844,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
 #endif
                         startstop = ide_start_power_step(drive, rq);
                         if (startstop == ide_stopped &&
-                            pm->pm_step == ide_pm_state_completed)
+                            pm->pm_step == IDE_PM_COMPLETED)
                                 ide_complete_pm_request(drive, rq);
                         return startstop;
                 } else if (!rq->rq_disk && blk_special_request(rq))
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 78776bbb537e..40b5a4614340 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -388,7 +388,7 @@ static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
         rq->cmd_type = REQ_TYPE_PM_SUSPEND;
         rq->special = &args;
         rq->data = &rqpm;
-        rqpm.pm_step = ide_pm_state_start_suspend;
+        rqpm.pm_step = IDE_PM_START_SUSPEND;
         if (mesg.event == PM_EVENT_PRETHAW)
                 mesg.event = PM_EVENT_FREEZE;
         rqpm.pm_state = mesg.event;
@@ -427,7 +427,7 @@ static int generic_ide_resume(struct device *dev)
         rq->cmd_flags |= REQ_PREEMPT;
         rq->special = &args;
         rq->data = &rqpm;
-        rqpm.pm_step = ide_pm_state_start_resume;
+        rqpm.pm_step = IDE_PM_START_RESUME;
         rqpm.pm_state = PM_EVENT_ON;
 
         err = blk_execute_rq(drive->queue, NULL, rq, 1);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index cf7ec3a9d173..02984f1f041a 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -988,36 +988,34 @@ enum {
 }
 
 /*
- * Power Management step value (rq->pm->pm_step).
+ * Power Management state machine (rq->pm->pm_step).
  *
- * The step value starts at 0 (ide_pm_state_start_suspend) for a
- * suspend operation or 1000 (ide_pm_state_start_resume) for a
- * resume operation.
- *
- * For each step, the core calls the subdriver start_power_step() first.
+ * For each step, the core calls ide_start_power_step() first.
  * This can return:
  *      - ide_stopped : In this case, the core calls us back again unless
  *                      step have been set to ide_power_state_completed.
  *      - ide_started : In this case, the channel is left busy until an
  *                      async event (interrupt) occurs.
- * Typically, start_power_step() will issue a taskfile request with
+ * Typically, ide_start_power_step() will issue a taskfile request with
  * do_rw_taskfile().
  *
- * Upon reception of the interrupt, the core will call complete_power_step()
+ * Upon reception of the interrupt, the core will call ide_complete_power_step()
  * with the error code if any. This routine should update the step value
  * and return. It should not start a new request. The core will call
- * start_power_step for the new step value, unless step have been set to
- * ide_power_state_completed.
- *
- * Subdrivers are expected to define their own additional power
- * steps from 1..999 for suspend and from 1001..1999 for resume,
- * other values are reserved for future use.
+ * ide_start_power_step() for the new step value, unless step have been
+ * set to IDE_PM_COMPLETED.
  */
-
 enum {
-        ide_pm_state_completed          = -1,
-        ide_pm_state_start_suspend      = 0,
-        ide_pm_state_start_resume       = 1000,
+        IDE_PM_START_SUSPEND,
+        IDE_PM_FLUSH_CACHE      = IDE_PM_START_SUSPEND,
+        IDE_PM_STANDBY,
+
+        IDE_PM_START_RESUME,
+        IDE_PM_RESTORE_PIO      = IDE_PM_START_RESUME,
+        IDE_PM_IDLE,
+        IDE_PM_RESTORE_DMA,
+
+        IDE_PM_COMPLETED,
 };
 
 /*