ide: remove ide_use_fast_pio()

Remove ide_use_fast_pio() and just re-tune PIO unconditionally if DMA tuning
has failed in ->ide_dma_check.  All host drivers using ide_use_fast_pio() set
drive->autotune so PIO is always tuned anyway and in some cases we _really_
need to re-tune PIO because PIO and DMA timings are shared.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-lib.c

@@ -96,21 +96,6 @@ static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
 	return min(speed, mode);
 }
 
-int ide_use_fast_pio(ide_drive_t *drive)
-{
-	struct hd_driveid *id = drive->id;
-
-	if ((id->capability & 1) && drive->autodma)
-		return 1;
-
-	if ((id->capability & 8) || (id->field_valid & 2))
-		return 1;
-
-	return 0;
-}
-
-EXPORT_SYMBOL_GPL(ide_use_fast_pio);
-
 /*
  * Standard (generic) timings for PIO modes, from ATA2 specification.
  * These timings are for access to the IDE data port register *only*.

drivers/ide/pci/aec62xx.c

@@ -146,7 +146,6 @@ static int aec62xx_config_drive_xfer_rate (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/atiixp.c

@@ -171,7 +171,6 @@ static int atiixp_dma_check(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/cmd64x.c

@@ -335,7 +335,6 @@ static int cmd64x_config_drive_for_dma (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/cs5535.c

@@ -162,7 +162,6 @@ static int cs5535_dma_check(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/hpt34x.c

@@ -85,7 +85,6 @@ static int hpt34x_config_drive_xfer_rate (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return -1;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/hpt366.c

@@ -718,7 +718,6 @@ static int hpt366_config_drive_xfer_rate(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/pdc202xx_new.c

@@ -228,7 +228,6 @@ static int pdcnew_config_drive_xfer_rate(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/pdc202xx_old.c

@@ -184,7 +184,6 @@ static int pdc202xx_config_drive_xfer_rate (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/piix.c

@@ -267,7 +267,6 @@ static int piix_config_drive_xfer_rate (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/scc_pata.c

@@ -299,7 +299,6 @@ static int scc_config_drive_for_dma(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/serverworks.c

@@ -201,7 +201,6 @@ static int svwks_config_drive_xfer_rate (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/siimage.c

@@ -326,7 +326,6 @@ static int siimage_config_drive_for_dma (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/sis5513.c

@@ -606,7 +606,6 @@ static int sis5513_config_xfer_rate(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/slc90e66.c

@@ -135,7 +135,6 @@ static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

drivers/ide/pci/tc86c001.c

@@ -167,7 +167,6 @@ static int tc86c001_config_drive_xfer_rate(ide_drive_t *drive)
 	if (ide_tune_dma(drive))
 		return 0;
 
-	if (ide_use_fast_pio(drive))
 	ide_set_max_pio(drive);
 
 	return -1;

include/linux/ide.h

@@ -1380,7 +1380,6 @@ static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
 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);
-int ide_use_fast_pio(ide_drive_t *);
 
 static inline int ide_dev_has_iordy(struct hd_driveid *id)
 {