ide: remove ide_dma_enable()

* check ->speedproc return value in ide_tune_dma()
* use ide_tune_dma() in cmd64x/cs5530/sc1200/siimage/sl82c105/scc_pata drivers
* remove no longer needed ide_dma_enable()

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

drivers/ide/ide-dma.c

@@ -792,9 +792,10 @@ int ide_tune_dma(ide_drive_t *drive)
 	if (!speed)
 		return 0;
 
-	drive->hwif->speedproc(drive, speed);
+	if (drive->hwif->speedproc(drive, speed))
+		return 0;
 
-	return ide_dma_enable(drive);
+	return 1;
 }
 
 EXPORT_SYMBOL_GPL(ide_tune_dma);

drivers/ide/ide-lib.c

@@ -111,18 +111,6 @@ u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
 
 EXPORT_SYMBOL(ide_rate_filter);
 
-int ide_dma_enable (ide_drive_t *drive)
-{
-	ide_hwif_t *hwif	= HWIF(drive);
-	struct hd_driveid *id	= drive->id;
-
-	return ((int)	((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
-			  ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
-			  ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
-}
-
-EXPORT_SYMBOL(ide_dma_enable);
-
 int ide_use_fast_pio(ide_drive_t *drive)
 {
 	struct hd_driveid *id = drive->id;

drivers/ide/pci/cmd64x.c

@@ -352,22 +352,9 @@ static int cmd64x_tune_chipset (ide_drive_t *drive, u8 speed)
 	return ide_config_drive_speed(drive, speed);
 }
 
-static int config_chipset_for_dma (ide_drive_t *drive)
-{
-	u8 speed = ide_max_dma_mode(drive);
-
-	if (!speed)
-		return 0;
-
-	if (cmd64x_tune_chipset(drive, speed))
-		return 0;
-
-	return ide_dma_enable(drive);
-}
-
 static int cmd64x_config_drive_for_dma (ide_drive_t *drive)
 {
-	if (ide_use_dma(drive) && config_chipset_for_dma(drive))
+	if (ide_tune_dma(drive))
 		return 0;
 
 	if (ide_use_fast_pio(drive))

drivers/ide/pci/cs5530.c

@@ -137,12 +137,8 @@ out:
 
 static int cs5530_config_dma(ide_drive_t *drive)
 {
-	if (ide_use_dma(drive)) {
-		u8 mode = ide_max_dma_mode(drive);
-
-		if (mode && drive->hwif->speedproc(drive, mode) == 0)
-			return 0;
-	}
+	if (ide_tune_dma(drive))
+		return 0;
 
 	return 1;
 }

drivers/ide/pci/sc1200.c

@@ -240,12 +240,8 @@ static int sc1200_tune_chipset(ide_drive_t *drive, u8 mode)
  */
 static int sc1200_config_dma (ide_drive_t *drive)
 {
-	if (ide_use_dma(drive)) {
-		u8 mode = ide_max_dma_mode(drive);
-
-		if (mode && drive->hwif->speedproc(drive, mode) == 0)
-			return 0;
-	}
+	if (ide_tune_dma(drive))
+		return 0;
 
 	return 1;
 }

drivers/ide/pci/scc_pata.c

@@ -321,26 +321,6 @@ static int scc_tune_chipset(ide_drive_t *drive, byte xferspeed)
 	return ide_config_drive_speed(drive, speed);
 }
 
-/**
- *	scc_config_chipset_for_dma	-	configure for DMA
- *	@drive: drive to configure
- *
- *	Called by scc_config_drive_for_dma().
- */
-
-static int scc_config_chipset_for_dma(ide_drive_t *drive)
-{
-	u8 speed = ide_max_dma_mode(drive);
-
-	if (!speed)
-		return 0;
-
-	if (scc_tune_chipset(drive, speed))
-		return 0;
-
-	return ide_dma_enable(drive);
-}
-
 /**
  *	scc_configure_drive_for_dma	-	set up for DMA transfers
  *	@drive: drive we are going to set up
@@ -354,7 +334,7 @@ static int scc_config_chipset_for_dma(ide_drive_t *drive)
 
 static int scc_config_drive_for_dma(ide_drive_t *drive)
 {
-	if (ide_use_dma(drive) && scc_config_chipset_for_dma(drive))
+	if (ide_tune_dma(drive))
 		return 0;
 
 	if (ide_use_fast_pio(drive))

drivers/ide/pci/siimage.c

@@ -374,28 +374,6 @@ static int siimage_tune_chipset (ide_drive_t *drive, byte xferspeed)
 	return (ide_config_drive_speed(drive, speed));
 }
 
-/**
- *	config_chipset_for_dma	-	configure for DMA
- *	@drive: drive to configure
- *
- *	Called by the IDE layer when it wants the timings set up.
- *	For the CMD680 we also need to set up the PIO timings and
- *	enable DMA.
- */
- 
-static int config_chipset_for_dma (ide_drive_t *drive)
-{
-	u8 speed = ide_max_dma_mode(drive);
-
-	if (!speed)
-		return 0;
-
-	if (siimage_tune_chipset(drive, speed))
-		return 0;
-
-	return ide_dma_enable(drive);
-}
-
 /**
  *	siimage_configure_drive_for_dma	-	set up for DMA transfers
  *	@drive: drive we are going to set up
@@ -408,7 +386,7 @@ static int config_chipset_for_dma (ide_drive_t *drive)
  
 static int siimage_config_drive_for_dma (ide_drive_t *drive)
 {
-	if (ide_use_dma(drive) && config_chipset_for_dma(drive))
+	if (ide_tune_dma(drive))
 		return 0;
 
 	if (ide_use_fast_pio(drive))

drivers/ide/pci/sl82c105.c

@@ -158,21 +158,6 @@ static int sl82c105_tune_chipset(ide_drive_t *drive, u8 speed)
 	return ide_config_drive_speed(drive, speed);
 }
 
-/*
- * Configure the drive for DMA.
- */
-static int config_for_dma(ide_drive_t *drive)
-{
-	u8 speed = ide_max_dma_mode(drive);
-
-	DBG(("config_for_dma(drive:%s)\n", drive->name));
-
-	if (!speed || sl82c105_tune_chipset(drive, speed))
-		return 0;
-
-	return ide_dma_enable(drive);
-}
-
 /*
  * Check to see if the drive and chipset are capable of DMA mode.
  */
@@ -180,7 +165,7 @@ static int sl82c105_ide_dma_check(ide_drive_t *drive)
 {
 	DBG(("sl82c105_ide_dma_check(drive:%s)\n", drive->name));
 
-	if (ide_use_dma(drive) && config_for_dma(drive))
+	if (ide_tune_dma(drive))
 		return 0;
 
 	return -1;

include/linux/ide.h

@@ -1357,7 +1357,6 @@ static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
 
 /* ide-lib.c */
 u8 ide_rate_filter(ide_drive_t *, u8);
-extern int ide_dma_enable(ide_drive_t *drive);
 extern char *ide_xfer_verbose(u8 xfer_rate);
 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);