ide-pmac: don't check kauai_lookup_timing() return value

kauai_lookup_timing() should always return non-zero return value:

* BUG() in kauai_lookup_timing() if the timing info cannot be found.

* Remove code checking for zero return value from all callers.

Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ppc/pmac.c

@@ -392,6 +392,7 @@ kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
 	for (i=0; table[i].cycle_time; i++)
 		if (cycle_time > table[i+1].cycle_time)
 			return table[i].timing_reg;
+	BUG();
 	return 0;
 }
 
@@ -637,8 +638,6 @@ pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	case controller_sh_ata6: {
 		/* 133Mhz cell */
 		u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
-		if (tr == 0)
-			return;
 		*timings = ((*timings) & ~TR_133_PIOREG_PIO_MASK) | tr;
 		break;
 		}
@@ -646,8 +645,6 @@ pmac_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	case controller_k2_ata6: {
 		/* 100Mhz cell */
 		u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
-		if (tr == 0)
-			return;
 		*timings = ((*timings) & ~TR_100_PIOREG_PIO_MASK) | tr;
 		break;
 		}
@@ -746,8 +743,6 @@ set_timings_udma_ata6(u32 *pio_timings, u32 *ultra_timings, u8 speed)
 	if (speed > XFER_UDMA_5 || t == NULL)
 		return 1;
 	tr = kauai_lookup_timing(kauai_udma_timings, (int)t->udma);
-	if (tr == 0)
-		return 1;
 	*ultra_timings = ((*ultra_timings) & ~TR_100_UDMAREG_UDMA_MASK) | tr;
 	*ultra_timings = (*ultra_timings) | TR_100_UDMAREG_UDMA_EN;
 
@@ -766,8 +761,6 @@ set_timings_udma_shasta(u32 *pio_timings, u32 *ultra_timings, u8 speed)
 	if (speed > XFER_UDMA_6 || t == NULL)
 		return 1;
 	tr = kauai_lookup_timing(shasta_udma133_timings, (int)t->udma);
-	if (tr == 0)
-		return 1;
 	*ultra_timings = ((*ultra_timings) & ~TR_133_UDMAREG_UDMA_MASK) | tr;
 	*ultra_timings = (*ultra_timings) | TR_133_UDMAREG_UDMA_EN;
 
@@ -839,8 +832,6 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
 	case controller_sh_ata6: {
 		/* 133Mhz cell */
 		u32 tr = kauai_lookup_timing(shasta_mdma_timings, cycleTime);
-		if (tr == 0)
-			return 1;
 		*timings = ((*timings) & ~TR_133_PIOREG_MDMA_MASK) | tr;
 		*timings2 = (*timings2) & ~TR_133_UDMAREG_UDMA_EN;
 		}
@@ -848,8 +839,6 @@ set_timings_mdma(ide_drive_t *drive, int intf_type, u32 *timings, u32 *timings2,
 	case controller_k2_ata6: {
 		/* 100Mhz cell */
 		u32 tr = kauai_lookup_timing(kauai_mdma_timings, cycleTime);
-		if (tr == 0)
-			return 1;
 		*timings = ((*timings) & ~TR_100_PIOREG_MDMA_MASK) | tr;
 		*timings2 = (*timings2) & ~TR_100_UDMAREG_UDMA_EN;
 		}