ide: make ide_hwif_t.ide_dma_{host_off,off_quietly} void (v2)

* since ide_hwif_t.ide_dma_{host_off,off_quietly} always return '0'
  make these functions void and while at it drop "ide_" prefix
* fix comment for __ide_dma_off_quietly()
* make __ide_dma_{host_off,off_quietly,off}() void and drop "__" prefix

v2:
* while at it rename atiixp_ide_dma_host_off() to atiixp_dma_host_off(),
  sgiioc4_ide_dma_{host_off,off_quietly}() to sgiioc4_dma_{host_off,off_quietly}()
  and sl82c105_ide_dma_off_quietly() to sl82c105_dma_off_quietly()
  [ Noticed by Sergei Shtylyov <sshtylyov@ru.mvista.com>. ]

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

drivers/ide/arm/icside.c

@@ -307,15 +307,13 @@ static int icside_set_speed(ide_drive_t *drive, u8 xfer_mode)
 	return on;
 }
 
-static int icside_dma_host_off(ide_drive_t *drive)
+static void icside_dma_host_off(ide_drive_t *drive)
 {
-	return 0;
 }
 
-static int icside_dma_off_quietly(ide_drive_t *drive)
+static void icside_dma_off_quietly(ide_drive_t *drive)
 {
 	drive->using_dma = 0;
-	return icside_dma_host_off(drive);
 }
 
 static int icside_dma_host_on(ide_drive_t *drive)
@@ -494,8 +492,8 @@ static void icside_dma_init(ide_hwif_t *hwif)
 	hwif->autodma		= autodma;
 
 	hwif->ide_dma_check	= icside_dma_check;
-	hwif->ide_dma_host_off	= icside_dma_host_off;
-	hwif->ide_dma_off_quietly = icside_dma_off_quietly;
+	hwif->dma_host_off	= icside_dma_host_off;
+	hwif->dma_off_quietly	= icside_dma_off_quietly;
 	hwif->ide_dma_host_on	= icside_dma_host_on;
 	hwif->ide_dma_on	= icside_dma_on;
 	hwif->dma_setup		= icside_dma_setup;

drivers/ide/cris/ide-cris.c

@@ -682,9 +682,12 @@ static void cris_ide_input_data (ide_drive_t *drive, void *, unsigned int);
 static void cris_ide_output_data (ide_drive_t *drive, void *, unsigned int);
 static void cris_atapi_input_bytes(ide_drive_t *drive, void *, unsigned int);
 static void cris_atapi_output_bytes(ide_drive_t *drive, void *, unsigned int);
-static int cris_dma_off (ide_drive_t *drive);
 static int cris_dma_on (ide_drive_t *drive);
 
+static void cris_dma_off(ide_drive_t *drive)
+{
+}
+
 static void tune_cris_ide(ide_drive_t *drive, u8 pio)
 {
 	int setup, strobe, hold;
@@ -814,9 +817,9 @@ init_e100_ide (void)
 		hwif->OUTBSYNC = &cris_ide_outbsync;
 		hwif->INB = &cris_ide_inb;
 		hwif->INW = &cris_ide_inw;
-		hwif->ide_dma_host_off = &cris_dma_off;
+		hwif->dma_host_off = &cris_dma_off;
 		hwif->ide_dma_host_on = &cris_dma_on;
-		hwif->ide_dma_off_quietly = &cris_dma_off;
+		hwif->dma_off_quietly = &cris_dma_off;
 		hwif->udma_four = 0;
 		hwif->ultra_mask = cris_ultra_mask;
 		hwif->mwdma_mask = 0x07; /* Multiword DMA 0-2 */
@@ -838,11 +841,6 @@ init_e100_ide (void)
 	cris_ide_set_speed(TYPE_UDMA, ATA_UDMA2_CYC, ATA_UDMA2_DVS, 0);
 }
 
-static int cris_dma_off (ide_drive_t *drive)
-{
-	return 0;
-}
-
 static int cris_dma_on (ide_drive_t *drive)
 {
 	return 0;

drivers/ide/ide-cd.c

@@ -1104,7 +1104,7 @@ static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
 	if (dma) {
 		info->dma = 0;
 		if ((dma_error = HWIF(drive)->ide_dma_end(drive)))
-			__ide_dma_off(drive);
+			ide_dma_off(drive);
 	}
 
 	if (cdrom_decode_status(drive, 0, &stat))
@@ -1700,7 +1700,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	if (dma) {
 		if (dma_error) {
 			printk(KERN_ERR "ide-cd: dma error\n");
-			__ide_dma_off(drive);
+			ide_dma_off(drive);
 			return ide_error(drive, "dma error", stat);
 		}
 
@@ -1826,7 +1826,7 @@ static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
 		info->dma = 0;
 		if ((dma_error = HWIF(drive)->ide_dma_end(drive))) {
 			printk(KERN_ERR "ide-cd: write dma error\n");
-			__ide_dma_off(drive);
+			ide_dma_off(drive);
 		}
 	}
 

drivers/ide/ide-dma.c

@@ -414,61 +414,57 @@ static int dma_timer_expiry (ide_drive_t *drive)
 }
 
 /**
- *	__ide_dma_host_off	-	Generic DMA kill
+ *	ide_dma_host_off	-	Generic DMA kill
  *	@drive: drive to control
  *
  *	Perform the generic IDE controller DMA off operation. This
  *	works for most IDE bus mastering controllers
  */
 
-int __ide_dma_host_off (ide_drive_t *drive)
+void ide_dma_host_off(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
 	u8 unit			= (drive->select.b.unit & 0x01);
 	u8 dma_stat		= hwif->INB(hwif->dma_status);
 
 	hwif->OUTB((dma_stat & ~(1<<(5+unit))), hwif->dma_status);
-	return 0;
 }
 
-EXPORT_SYMBOL(__ide_dma_host_off);
+EXPORT_SYMBOL(ide_dma_host_off);
 
 /**
- *	__ide_dma_host_off_quietly	-	Generic DMA kill
+ *	ide_dma_off_quietly	-	Generic DMA kill
  *	@drive: drive to control
  *
  *	Turn off the current DMA on this IDE controller. 
  */
 
-int __ide_dma_off_quietly (ide_drive_t *drive)
+void ide_dma_off_quietly(ide_drive_t *drive)
 {
 	drive->using_dma = 0;
 	ide_toggle_bounce(drive, 0);
 
-	if (HWIF(drive)->ide_dma_host_off(drive))
-		return 1;
-
-	return 0;
+	drive->hwif->dma_host_off(drive);
 }
 
-EXPORT_SYMBOL(__ide_dma_off_quietly);
+EXPORT_SYMBOL(ide_dma_off_quietly);
 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
 
 /**
- *	__ide_dma_off	-	disable DMA on a device
+ *	ide_dma_off	-	disable DMA on a device
  *	@drive: drive to disable DMA on
  *
  *	Disable IDE DMA for a device on this IDE controller.
  *	Inform the user that DMA has been disabled.
  */
 
-int __ide_dma_off (ide_drive_t *drive)
+void ide_dma_off(ide_drive_t *drive)
 {
 	printk(KERN_INFO "%s: DMA disabled\n", drive->name);
-	return HWIF(drive)->ide_dma_off_quietly(drive);
+	drive->hwif->dma_off_quietly(drive);
 }
 
-EXPORT_SYMBOL(__ide_dma_off);
+EXPORT_SYMBOL(ide_dma_off);
 
 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 /**
@@ -758,7 +754,7 @@ void ide_dma_verbose(ide_drive_t *drive)
 	return;
 bug_dma_off:
 	printk(", BUG DMA OFF");
-	hwif->ide_dma_off_quietly(drive);
+	hwif->dma_off_quietly(drive);
 	return;
 }
 
@@ -773,7 +769,8 @@ int ide_set_dma(ide_drive_t *drive)
 
 	switch(rc) {
 	case -1: /* DMA needs to be disabled */
-		return hwif->ide_dma_off_quietly(drive);
+		hwif->dma_off_quietly(drive);
+		return 0;
 	case  0: /* DMA needs to be enabled */
 		return hwif->ide_dma_on(drive);
 	case  1: /* DMA setting cannot be changed */
@@ -937,10 +934,10 @@ void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_p
 	if (!(hwif->dma_prdtable))
 		hwif->dma_prdtable	= (hwif->dma_base + 4);
 
-	if (!hwif->ide_dma_off_quietly)
-		hwif->ide_dma_off_quietly = &__ide_dma_off_quietly;
-	if (!hwif->ide_dma_host_off)
-		hwif->ide_dma_host_off = &__ide_dma_host_off;
+	if (!hwif->dma_off_quietly)
+		hwif->dma_off_quietly = &ide_dma_off_quietly;
+	if (!hwif->dma_host_off)
+		hwif->dma_host_off = &ide_dma_host_off;
 	if (!hwif->ide_dma_on)
 		hwif->ide_dma_on = &__ide_dma_on;
 	if (!hwif->ide_dma_host_on)

drivers/ide/ide-floppy.c

@@ -867,7 +867,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
 		printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 			"more interrupts in DMA mode\n");
-		(void)__ide_dma_off(drive);
+		ide_dma_off(drive);
 		return ide_do_reset(drive);
 	}
 
@@ -1097,9 +1097,9 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	pc->current_position = pc->buffer;
 	bcount.all = min(pc->request_transfer, 63 * 1024);
 
-	if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
-		(void)__ide_dma_off(drive);
-	}
+	if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
+		ide_dma_off(drive);
+
 	feature.all = 0;
 
 	if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)

drivers/ide/ide-io.c

@@ -1351,7 +1351,7 @@ static ide_startstop_t ide_dma_timeout_retry(ide_drive_t *drive, int error)
 	 */
 	drive->retry_pio++;
 	drive->state = DMA_PIO_RETRY;
-	(void) hwif->ide_dma_off_quietly(drive);
+	hwif->dma_off_quietly(drive);
 
 	/*
 	 * un-busy drive etc (hwgroup->busy is cleared on return) and

drivers/ide/ide-iops.c

@@ -753,7 +753,7 @@ int ide_config_drive_speed (ide_drive_t *drive, u8 speed)
 
 #ifdef CONFIG_BLK_DEV_IDEDMA
 	if (hwif->ide_dma_check)	 /* check if host supports DMA */
-		hwif->ide_dma_host_off(drive);
+		hwif->dma_host_off(drive);
 #endif
 
 	/*
@@ -832,7 +832,7 @@ int ide_config_drive_speed (ide_drive_t *drive, u8 speed)
 	if (speed >= XFER_SW_DMA_0)
 		hwif->ide_dma_host_on(drive);
 	else if (hwif->ide_dma_check)	/* check if host supports DMA */
-		hwif->ide_dma_off_quietly(drive);
+		hwif->dma_off_quietly(drive);
 #endif
 
 	switch(speed) {
@@ -1042,12 +1042,12 @@ static void check_dma_crc(ide_drive_t *drive)
 {
 #ifdef CONFIG_BLK_DEV_IDEDMA
 	if (drive->crc_count) {
-		(void) HWIF(drive)->ide_dma_off_quietly(drive);
+		drive->hwif->dma_off_quietly(drive);
 		ide_set_xfer_rate(drive, ide_auto_reduce_xfer(drive));
 		if (drive->current_speed >= XFER_SW_DMA_0)
 			(void) HWIF(drive)->ide_dma_on(drive);
 	} else
-		(void)__ide_dma_off(drive);
+		ide_dma_off(drive);
 #endif
 }
 

drivers/ide/ide-probe.c

@@ -853,7 +853,7 @@ static void probe_hwif(ide_hwif_t *hwif)
 				 * things, if not checked and cleared.
 				 *   PARANOIA!!!
 				 */
-				hwif->ide_dma_off_quietly(drive);
+				hwif->dma_off_quietly(drive);
 #ifdef CONFIG_IDEDMA_ONLYDISK
 				if (drive->media == ide_disk)
 #endif

drivers/ide/ide-tape.c

@@ -1970,7 +1970,7 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
 		printk(KERN_ERR "ide-tape: The tape wants to issue more "
 				"interrupts in DMA mode\n");
 		printk(KERN_ERR "ide-tape: DMA disabled, reverting to PIO\n");
-		(void)__ide_dma_off(drive);
+		ide_dma_off(drive);
 		return ide_do_reset(drive);
 	}
 	/* Get the number of bytes to transfer on this interrupt. */
@@ -2176,7 +2176,7 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
 	if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
 		printk(KERN_WARNING "ide-tape: DMA disabled, "
 				"reverting to PIO\n");
-		(void)__ide_dma_off(drive);
+		ide_dma_off(drive);
 	}
 	if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
 		dma_ok = !hwif->dma_setup(drive);

drivers/ide/ide.c

@@ -506,11 +506,11 @@ static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif)
 	hwif->ide_dma_end		= tmp_hwif->ide_dma_end;
 	hwif->ide_dma_check		= tmp_hwif->ide_dma_check;
 	hwif->ide_dma_on		= tmp_hwif->ide_dma_on;
-	hwif->ide_dma_off_quietly	= tmp_hwif->ide_dma_off_quietly;
+	hwif->dma_off_quietly		= tmp_hwif->dma_off_quietly;
 	hwif->ide_dma_test_irq		= tmp_hwif->ide_dma_test_irq;
 	hwif->ide_dma_clear_irq		= tmp_hwif->ide_dma_clear_irq;
 	hwif->ide_dma_host_on		= tmp_hwif->ide_dma_host_on;
-	hwif->ide_dma_host_off		= tmp_hwif->ide_dma_host_off;
+	hwif->dma_host_off		= tmp_hwif->dma_host_off;
 	hwif->ide_dma_lostirq		= tmp_hwif->ide_dma_lostirq;
 	hwif->ide_dma_timeout		= tmp_hwif->ide_dma_timeout;
 
@@ -1138,10 +1138,8 @@ static int set_using_dma (ide_drive_t *drive, int arg)
 		if (ide_set_dma(drive))
 			return -EIO;
 		if (HWIF(drive)->ide_dma_on(drive)) return -EIO;
-	} else {
-		if (__ide_dma_off(drive))
-			return -EIO;
-	}
+	} else
+		ide_dma_off(drive);
 	return 0;
 #else
 	return -EPERM;

drivers/ide/mips/au1xxx-ide.c

@@ -449,16 +449,13 @@ static int auide_dma_on(ide_drive_t *drive)
 	return auide_dma_host_on(drive);
 }
 
-
-static int auide_dma_host_off(ide_drive_t *drive)
+static void auide_dma_host_off(ide_drive_t *drive)
 {
-	return 0;
 }
 
-static int auide_dma_off_quietly(ide_drive_t *drive)
+static void auide_dma_off_quietly(ide_drive_t *drive)
 {
 	drive->using_dma = 0;
-	return auide_dma_host_off(drive);
 }
 
 static int auide_dma_lostirq(ide_drive_t *drive)
@@ -724,7 +721,7 @@ static int au_ide_probe(struct device *dev)
 	hwif->speedproc                 = &auide_tune_chipset;
 
 #ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
-	hwif->ide_dma_off_quietly       = &auide_dma_off_quietly;
+	hwif->dma_off_quietly		= &auide_dma_off_quietly;
 	hwif->ide_dma_timeout           = &auide_dma_timeout;
 
 	hwif->ide_dma_check             = &auide_dma_check;
@@ -733,7 +730,7 @@ static int au_ide_probe(struct device *dev)
 	hwif->ide_dma_end               = &auide_dma_end;
 	hwif->dma_setup                 = &auide_dma_setup;
 	hwif->ide_dma_test_irq          = &auide_dma_test_irq;
-	hwif->ide_dma_host_off          = &auide_dma_host_off;
+	hwif->dma_host_off		= &auide_dma_host_off;
 	hwif->ide_dma_host_on           = &auide_dma_host_on;
 	hwif->ide_dma_lostirq           = &auide_dma_lostirq;
 	hwif->ide_dma_on                = &auide_dma_on;

drivers/ide/pci/atiixp.c

@@ -121,7 +121,7 @@ static int atiixp_ide_dma_host_on(ide_drive_t *drive)
 	return __ide_dma_host_on(drive);
 }
 
-static int atiixp_ide_dma_host_off(ide_drive_t *drive)
+static void atiixp_dma_host_off(ide_drive_t *drive)
 {
 	struct pci_dev *dev = drive->hwif->pci_dev;
 	unsigned long flags;
@@ -135,7 +135,7 @@ static int atiixp_ide_dma_host_off(ide_drive_t *drive)
 
 	spin_unlock_irqrestore(&atiixp_lock, flags);
 
-	return __ide_dma_host_off(drive);
+	ide_dma_host_off(drive);
 }
 
 /**
@@ -306,7 +306,7 @@ static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 		hwif->udma_four = 0;
 
 	hwif->ide_dma_host_on = &atiixp_ide_dma_host_on;
-	hwif->ide_dma_host_off = &atiixp_ide_dma_host_off;
+	hwif->dma_host_off = &atiixp_dma_host_off;
 	hwif->ide_dma_check = &atiixp_dma_check;
 	if (!noautodma)
 		hwif->autodma = 1;

drivers/ide/pci/cs5530.c

@@ -109,7 +109,7 @@ static int cs5530_config_dma (ide_drive_t *drive)
 	/*
 	 * Default to DMA-off in case we run into trouble here.
 	 */
-	hwif->ide_dma_off_quietly(drive);
+	hwif->dma_off_quietly(drive);
 
 	/*
 	 * The CS5530 specifies that two drives sharing a cable cannot