diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 4a668d51965da507adc1783cc72048c7bf5f7019..b7e872e29f9c607f19b477438939fbf8a3e81111 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -737,6 +737,7 @@ int ide_register_hw(hw_regs_t *hw, void (*fixup)(ide_hwif_t *),
 	hwif->fixup = fixup;
 	hwif->chipset = hw->chipset;
 	hwif->gendev.parent = hw->dev;
+	hwif->ack_intr = hw->ack_intr;
 
 	if (initializing == 0) {
 		u8 idx[4] = { index, 0xff, 0xff, 0xff };
diff --git a/drivers/ide/ppc/mpc8xx.c b/drivers/ide/ppc/mpc8xx.c
index df2e92034f5d3719658008a1ec1e3eeee059ba85..5f0da35ab5ad0a3ef977ab67c8145c0733f47245 100644
--- a/drivers/ide/ppc/mpc8xx.c
+++ b/drivers/ide/ppc/mpc8xx.c
@@ -316,8 +316,8 @@ m8xx_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port,
 
 	ide_hwifs[data_port].pio_mask = ATA_PIO4;
 	ide_hwifs[data_port].set_pio_mode = m8xx_ide_set_pio_mode;
+	ide_hwifs[data_port].ack_intr = (ide_ack_intr_t *)ide_interrupt_ack;
 
-	hw->ack_intr = (ide_ack_intr_t *) ide_interrupt_ack;
 	/* Enable Harddisk Interrupt,
 	 * and make it edge sensitive
 	 */
@@ -402,8 +402,8 @@ void m8xx_ide_init_hwif_ports (hw_regs_t *hw,
 
 	ide_hwifs[data_port].pio_mask = ATA_PIO4;
 	ide_hwifs[data_port].set_pio_mode = m8xx_ide_set_pio_mode;
+	ide_hwifs[data_port].ack_intr = (ide_ack_intr_t *)ide_interrupt_ack;
 
-	hw->ack_intr = (ide_ack_intr_t *) ide_interrupt_ack;
 	/* Enable Harddisk Interrupt,
 	 * and make it edge sensitive
 	 */
diff --git a/include/asm-cris/arch-v32/ide.h b/include/asm-cris/arch-v32/ide.h
index 6590f657500dc1c6e7b1d3cd5e6eec265471dacb..11296170d057cf96abcced2b328874f963239f33 100644
--- a/include/asm-cris/arch-v32/ide.h
+++ b/include/asm-cris/arch-v32/ide.h
@@ -54,7 +54,7 @@ static inline unsigned long ide_default_io_base(int index)
 #define SUPPORT_VLB_SYNC 0
 
 #define IDE_ARCH_ACK_INTR
-#define ide_ack_intr(hwif)	(hwif)->hw.ack_intr(hwif)
+#define ide_ack_intr(hwif)	((hwif)->ack_intr(hwif))
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-m68k/ide.h b/include/asm-m68k/ide.h
index f9ffb2cbbae826c571d0feaeee632b2eac68b5f5..909c6dfd3851169dae42ac87613a70fc912ece34 100644
--- a/include/asm-m68k/ide.h
+++ b/include/asm-m68k/ide.h
@@ -137,7 +137,7 @@ ide_get_lock(irq_handler_t handler, void *data)
 #endif /* CONFIG_BLK_DEV_FALCON_IDE */
 
 #define IDE_ARCH_ACK_INTR
-#define ide_ack_intr(hwif)	((hwif)->hw.ack_intr ? (hwif)->hw.ack_intr(hwif) : 1)
+#define ide_ack_intr(hwif)	((hwif)->ack_intr ? (hwif)->ack_intr(hwif) : 1)
 
 #endif /* __KERNEL__ */
 #endif /* _M68K_IDE_H */
diff --git a/include/asm-powerpc/ide.h b/include/asm-powerpc/ide.h
index e61dad73353fd0b64fd18d6c87ba9f71ed05064e..fd7f5a430f0afdc91e934b0ebf54102e7559efcc 100644
--- a/include/asm-powerpc/ide.h
+++ b/include/asm-powerpc/ide.h
@@ -69,7 +69,7 @@ static __inline__ unsigned long ide_default_io_base(int index)
 
 #ifdef CONFIG_BLK_DEV_MPC8xx_IDE
 #define IDE_ARCH_ACK_INTR  1
-#define ide_ack_intr(hwif) (hwif->hw.ack_intr ? hwif->hw.ack_intr(hwif) : 1)
+#define ide_ack_intr(hwif) ((hwif)->ack_intr ? (hwif)->ack_intr(hwif) : 1)
 #endif
 
 #endif /* __powerpc64__ */
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9686cb47eee181198c2b641c714a678a7c6be4ec..1e6bf04160d8fa172648e18b606729caf33e8913 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -683,6 +683,8 @@ typedef struct hwif_s {
 	struct pci_dev  *pci_dev;	/* for pci chipsets */
 	struct ide_pci_device_s	*cds;	/* chipset device struct */
 
+	ide_ack_intr_t *ack_intr;
+
 	void (*rw_disk)(ide_drive_t *, struct request *);
 
 #if 0