ide: move read_sff_dma_status() method to 'struct ide_dma_ops'

Move apparently misplaced read_sff_dma_status() method from 'struct ide_tp_ops'
to 'struct ide_dma_ops', renaming it to dma_sff_read_status() and making only
required for SFF-8038i compatible IDE controller drivers (greatly cutting down
the number of initializers) as its only user (outside ide-dma-sff.c and such
drivers) appears to be ide_pci_check_simplex() which is only called for such
controllers...

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

23 files changed, 65 insertions, 42 deletions

diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
index f1c817240501..66f43083408b 100644
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -509,6 +509,7 @@ static const struct ide_dma_ops ali_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info ali15x3_chipset __devinitdata = {
diff --git a/drivers/ide/au1xxx-ide.c b/drivers/ide/au1xxx-ide.c
index 11f2c8f3db48..79a2dfed8eb7 100644
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -502,7 +502,6 @@ static const struct ide_tp_ops au1xxx_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
diff --git a/drivers/ide/cmd64x.c b/drivers/ide/cmd64x.c
index 265cf9268c63..2f9688d87ecd 100644
--- a/drivers/ide/cmd64x.c
+++ b/drivers/ide/cmd64x.c
@@ -385,6 +385,7 @@ static const struct ide_dma_ops cmd64x_dma_ops = {
         .dma_test_irq           = cmd64x_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_dma_ops cmd646_rev1_dma_ops = {
@@ -396,6 +397,7 @@ static const struct ide_dma_ops cmd646_rev1_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_dma_ops cmd648_dma_ops = {
@@ -407,6 +409,7 @@ static const struct ide_dma_ops cmd648_dma_ops = {
         .dma_test_irq           = cmd648_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
diff --git a/drivers/ide/falconide.c b/drivers/ide/falconide.c
index 39d500d84b07..a5ba820d69bb 100644
--- a/drivers/ide/falconide.c
+++ b/drivers/ide/falconide.c
@@ -70,7 +70,6 @@ static const struct ide_tp_ops falconide_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
index 208614f4dc3c..3eb9b5c63a0f 100644
--- a/drivers/ide/hpt366.c
+++ b/drivers/ide/hpt366.c
@@ -1424,6 +1424,7 @@ static const struct ide_dma_ops hpt37x_dma_ops = {
         .dma_test_irq           = hpt374_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_dma_ops hpt370_dma_ops = {
@@ -1435,6 +1436,7 @@ static const struct ide_dma_ops hpt370_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = hpt370_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_dma_ops hpt36x_dma_ops = {
@@ -1446,6 +1448,7 @@ static const struct ide_dma_ops hpt36x_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = hpt366_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info hpt366_chipsets[] __devinitdata = {
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index 623a82d1535d..bcdadc777564 100644
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -50,6 +50,17 @@ int config_drive_for_dma(ide_drive_t *drive)
         return 0;
 }
 
+u8 ide_dma_sff_read_status(ide_hwif_t *hwif)
+{
+        unsigned long addr = hwif->dma_base + ATA_DMA_STATUS;
+
+        if (hwif->host_flags & IDE_HFLAG_MMIO)
+                return readb((void __iomem *)addr);
+        else
+                return inb(addr);
+}
+EXPORT_SYMBOL_GPL(ide_dma_sff_read_status);
+
 /**
  *      ide_dma_host_set        -       Enable/disable DMA on a host
  *      @drive: drive to control
@@ -62,7 +73,7 @@ void ide_dma_host_set(ide_drive_t *drive, int on)
 {
         ide_hwif_t *hwif = drive->hwif;
         u8 unit = drive->dn & 1;
-        u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
         if (on)
                 dma_stat |= (1 << (5 + unit));
@@ -200,7 +211,7 @@ int ide_dma_setup(ide_drive_t *drive)
                 outb(reading, hwif->dma_base + ATA_DMA_CMD);
 
         /* read DMA status for INTR & ERROR flags */
-        dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
         /* clear INTR & ERROR flags */
         if (mmio)
@@ -232,7 +243,7 @@ EXPORT_SYMBOL_GPL(ide_dma_setup);
 static int dma_timer_expiry(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
-        u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
         printk(KERN_WARNING "%s: %s: DMA status (0x%02x)\n",
                 drive->name, __func__, dma_stat);
@@ -305,7 +316,7 @@ int ide_dma_end(ide_drive_t *drive)
         }
 
         /* get DMA status */
-        dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
         if (mmio)
                 /* clear the INTR & ERROR bits */
@@ -331,7 +342,7 @@ EXPORT_SYMBOL_GPL(ide_dma_end);
 int ide_dma_test_irq(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
-        u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
         return (dma_stat & ATA_DMA_INTR) ? 1 : 0;
 }
@@ -346,5 +357,6 @@ const struct ide_dma_ops sff_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_timeout            = ide_dma_timeout,
         .dma_lost_irq           = ide_dma_lost_irq,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 EXPORT_SYMBOL_GPL(sff_dma_ops);
diff --git a/drivers/ide/ide-h8300.c b/drivers/ide/ide-h8300.c
index e2cdd2e9cdec..9270d3255ee0 100644
--- a/drivers/ide/ide-h8300.c
+++ b/drivers/ide/ide-h8300.c
@@ -159,7 +159,6 @@ static const struct ide_tp_ops h8300_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 1a22c31ce7ac..e728cfe7273f 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -105,15 +105,6 @@ u8 ide_read_altstatus(ide_hwif_t *hwif)
 }
 EXPORT_SYMBOL_GPL(ide_read_altstatus);
 
-u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
-{
-        if (hwif->host_flags & IDE_HFLAG_MMIO)
-                return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-        else
-                return inb(hwif->dma_base + ATA_DMA_STATUS);
-}
-EXPORT_SYMBOL_GPL(ide_read_sff_dma_status);
-
 void ide_set_irq(ide_hwif_t *hwif, int on)
 {
         u8 ctl = ATA_DEVCTL_OBS;
@@ -388,7 +379,6 @@ const struct ide_tp_ops default_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index ebb1b7f863f4..0ccbb4459fb9 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1229,6 +1229,8 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
         if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
                 int rc;
 
+                hwif->dma_ops = d->dma_ops;
+
                 if (d->init_dma)
                         rc = d->init_dma(hwif, d);
                 else
@@ -1236,12 +1238,13 @@ static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
 
                 if (rc < 0) {
                         printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
+
+                        hwif->dma_ops = NULL;
                         hwif->dma_base = 0;
                         hwif->swdma_mask = 0;
                         hwif->mwdma_mask = 0;
                         hwif->ultra_mask = 0;
-                } else if (d->dma_ops)
-                        hwif->dma_ops = d->dma_ops;
+                }
         }
 
         if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index 879056645352..0be27ac1f077 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -512,6 +512,7 @@ static struct ide_dma_ops it821x_pass_through_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_timeout            = ide_dma_timeout,
         .dma_lost_irq           = ide_dma_lost_irq,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 /**
diff --git a/drivers/ide/ns87415.c b/drivers/ide/ns87415.c
index aceb2fcbe1d1..83643ed9a426 100644
--- a/drivers/ide/ns87415.c
+++ b/drivers/ide/ns87415.c
@@ -56,7 +56,7 @@ static u8 superio_read_status(ide_hwif_t *hwif)
         return superio_ide_inb(hwif->io_ports.status_addr);
 }
 
-static u8 superio_read_sff_dma_status(ide_hwif_t *hwif)
+static u8 superio_dma_sff_read_status(ide_hwif_t *hwif)
 {
         return superio_ide_inb(hwif->dma_base + ATA_DMA_STATUS);
 }
@@ -109,7 +109,6 @@ static const struct ide_tp_ops superio_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = superio_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = superio_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
@@ -132,6 +131,8 @@ static void __devinit superio_init_iops(struct hwif_s *hwif)
         tmp = superio_ide_inb(dma_stat);
         outb(tmp | 0x66, dma_stat);
 }
+#else
+#define superio_dma_sff_read_status ide_dma_sff_read_status
 #endif
 
 static unsigned int ns87415_count = 0, ns87415_control[MAX_HWIFS] = { 0 };
@@ -201,7 +202,7 @@ static int ns87415_dma_end(ide_drive_t *drive)
         u8 dma_stat = 0, dma_cmd = 0;
 
         drive->waiting_for_dma = 0;
-        dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
         /* get DMA command mode */
         dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
         /* stop DMA */
@@ -308,6 +309,7 @@ static const struct ide_dma_ops ns87415_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = superio_dma_sff_read_status,
 };
 
 static const struct ide_port_info ns87415_chipset __devinitdata = {
diff --git a/drivers/ide/pdc202xx_old.c b/drivers/ide/pdc202xx_old.c
index e8e6b29d9e41..97193323aebf 100644
--- a/drivers/ide/pdc202xx_old.c
+++ b/drivers/ide/pdc202xx_old.c
@@ -337,6 +337,7 @@ static const struct ide_dma_ops pdc20246_dma_ops = {
         .dma_test_irq           = pdc202xx_dma_test_irq,
         .dma_lost_irq           = pdc202xx_dma_lost_irq,
         .dma_timeout            = pdc202xx_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_dma_ops pdc2026x_dma_ops = {
@@ -348,6 +349,7 @@ static const struct ide_dma_ops pdc2026x_dma_ops = {
         .dma_test_irq           = pdc202xx_dma_test_irq,
         .dma_lost_irq           = pdc202xx_dma_lost_irq,
         .dma_timeout            = pdc202xx_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 #define DECLARE_PDC2026X_DEV(udma, sectors) \
diff --git a/drivers/ide/pmac.c b/drivers/ide/pmac.c
index ee52a21af1be..74625e821a43 100644
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -955,7 +955,6 @@ static const struct ide_tp_ops pmac_tp_ops = {
         .exec_command           = pmac_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = pmac_set_irq,
 
diff --git a/drivers/ide/q40ide.c b/drivers/ide/q40ide.c
index 4af4a8ce4cdf..9f9c0b3cc3a3 100644
--- a/drivers/ide/q40ide.c
+++ b/drivers/ide/q40ide.c
@@ -99,7 +99,6 @@ static const struct ide_tp_ops q40ide_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
diff --git a/drivers/ide/sc1200.c b/drivers/ide/sc1200.c
index 1cf477aaae36..dbdd2985a0d8 100644
--- a/drivers/ide/sc1200.c
+++ b/drivers/ide/sc1200.c
@@ -292,6 +292,7 @@ static const struct ide_dma_ops sc1200_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info sc1200_chipset __devinitdata = {
diff --git a/drivers/ide/scc_pata.c b/drivers/ide/scc_pata.c
index 5d53850c79d7..1cb43068455a 100644
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -143,7 +143,7 @@ static u8 scc_read_altstatus(ide_hwif_t *hwif)
         return (u8)in_be32((void *)hwif->io_ports.ctl_addr);
 }
 
-static u8 scc_read_sff_dma_status(ide_hwif_t *hwif)
+static u8 scc_dma_sff_read_status(ide_hwif_t *hwif)
 {
         return (u8)in_be32((void *)(hwif->dma_base + 4));
 }
@@ -853,7 +853,6 @@ static const struct ide_tp_ops scc_tp_ops = {
         .exec_command           = scc_exec_command,
         .read_status            = scc_read_status,
         .read_altstatus         = scc_read_altstatus,
-        .read_sff_dma_status    = scc_read_sff_dma_status,
 
         .set_irq                = scc_set_irq,
 
@@ -880,6 +879,7 @@ static const struct ide_dma_ops scc_dma_ops = {
         .dma_test_irq           = scc_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = scc_dma_sff_read_status,
 };
 
 #define DECLARE_SCC_DEV(name_str)                       \
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index bc37dff8c675..e85d1ed29c2a 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -130,7 +130,7 @@ int ide_pci_check_simplex(ide_hwif_t *hwif, const struct ide_port_info *d)
          * we tune the drive then try to grab DMA ownership if we want to be
          * the DMA end.  This has to be become dynamic to handle hot-plug.
          */
-        dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+        dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
         if ((dma_stat & 0x80) && hwif->mate && hwif->mate->dma_base) {
                 printk(KERN_INFO "%s %s: simplex device: DMA disabled\n",
                         d->name, pci_name(dev));
@@ -377,6 +377,9 @@ int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
 
                 hwif->dma_base = base;
 
+                if (hwif->dma_ops == NULL)
+                        hwif->dma_ops = &sff_dma_ops;
+
                 if (ide_pci_check_simplex(hwif, d) < 0)
                         return -1;
 
@@ -393,8 +396,6 @@ int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
 
                 if (ide_allocate_dma_engine(hwif))
                         return -1;
-
-                hwif->dma_ops = &sff_dma_ops;
         }
 
         return 0;
diff --git a/drivers/ide/sgiioc4.c b/drivers/ide/sgiioc4.c
index 8e1ffd57a86d..fdb9d7037694 100644
--- a/drivers/ide/sgiioc4.c
+++ b/drivers/ide/sgiioc4.c
@@ -523,7 +523,6 @@ static const struct ide_tp_ops sgiioc4_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = sgiioc4_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
diff --git a/drivers/ide/siimage.c b/drivers/ide/siimage.c
index 652b3a04620f..cb2b352b876b 100644
--- a/drivers/ide/siimage.c
+++ b/drivers/ide/siimage.c
@@ -717,6 +717,7 @@ static const struct ide_dma_ops sil_dma_ops = {
         .dma_test_irq           = siimage_dma_test_irq,
         .dma_timeout            = ide_dma_timeout,
         .dma_lost_irq           = ide_dma_lost_irq,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 #define DECLARE_SII_DEV(p_ops)                          \
diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index 1ded01d81ab3..48cc748c5043 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -299,6 +299,7 @@ static const struct ide_dma_ops sl82c105_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = sl82c105_dma_lost_irq,
         .dma_timeout            = sl82c105_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info sl82c105_chipset __devinitdata = {
diff --git a/drivers/ide/tc86c001.c b/drivers/ide/tc86c001.c
index d2c00fb928e4..84109f5a1632 100644
--- a/drivers/ide/tc86c001.c
+++ b/drivers/ide/tc86c001.c
@@ -188,6 +188,7 @@ static const struct ide_dma_ops tc86c001_dma_ops = {
         .dma_test_irq           = ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info tc86c001_chipset __devinitdata = {
diff --git a/drivers/ide/tx4939ide.c b/drivers/ide/tx4939ide.c
index 1ac27ac7283b..882f6f07c476 100644
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -397,6 +397,17 @@ static int tx4939ide_dma_test_irq(ide_drive_t *drive)
         return found;
 }
 
+#ifdef __BIG_ENDIAN
+static u8 tx4939ide_dma_sff_read_status(ide_hwif_t *hwif)
+{
+        void __iomem *base = TX4939IDE_BASE(hwif);
+
+        return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
+}
+#else
+#define tx4939ide_dma_sff_read_status ide_dma_sff_read_status
+#endif
+
 static void tx4939ide_init_hwif(ide_hwif_t *hwif)
 {
         void __iomem *base = TX4939IDE_BASE(hwif);
@@ -443,13 +454,6 @@ static void tx4939ide_tf_load_fixup(ide_drive_t *drive, ide_task_t *task)
 
 #ifdef __BIG_ENDIAN
 
-static u8 tx4939ide_read_sff_dma_status(ide_hwif_t *hwif)
-{
-        void __iomem *base = TX4939IDE_BASE(hwif);
-
-        return tx4939ide_readb(base, TX4939IDE_DMA_Stat);
-}
-
 /* custom iops (independent from SWAP_IO_SPACE) */
 static u8 tx4939ide_inb(unsigned long port)
 {
@@ -585,7 +589,6 @@ static const struct ide_tp_ops tx4939ide_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = tx4939ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
@@ -609,7 +612,6 @@ static const struct ide_tp_ops tx4939ide_tp_ops = {
         .exec_command           = ide_exec_command,
         .read_status            = ide_read_status,
         .read_altstatus         = ide_read_altstatus,
-        .read_sff_dma_status    = ide_read_sff_dma_status,
 
         .set_irq                = ide_set_irq,
 
@@ -638,6 +640,7 @@ static const struct ide_dma_ops tx4939ide_dma_ops = {
         .dma_test_irq           = tx4939ide_dma_test_irq,
         .dma_lost_irq           = ide_dma_lost_irq,
         .dma_timeout            = ide_dma_timeout,
+        .dma_sff_read_status    = tx4939ide_dma_sff_read_status,
 };
 
 static const struct ide_port_info tx4939ide_port_info __initdata = {
diff --git a/include/linux/ide.h b/include/linux/ide.h
index ebc22a836520..3644f6323384 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -674,7 +674,6 @@ struct ide_tp_ops {
         void    (*exec_command)(struct hwif_s *, u8);
         u8      (*read_status)(struct hwif_s *);
         u8      (*read_altstatus)(struct hwif_s *);
-        u8      (*read_sff_dma_status)(struct hwif_s *);
 
         void    (*set_irq)(struct hwif_s *, int);
 
@@ -735,6 +734,11 @@ struct ide_dma_ops {
         int     (*dma_test_irq)(struct ide_drive_s *);
         void    (*dma_lost_irq)(struct ide_drive_s *);
         void    (*dma_timeout)(struct ide_drive_s *);
+        /*
+         * The following method is optional and only required to be
+         * implemented for the SFF-8038i compatible controllers.
+         */
+        u8      (*dma_sff_read_status)(struct hwif_s *);
 };
 
 struct ide_host;
@@ -1177,7 +1181,6 @@ void ide_tf_dump(const char *, struct ide_taskfile *);
 void ide_exec_command(ide_hwif_t *, u8);
 u8 ide_read_status(ide_hwif_t *);
 u8 ide_read_altstatus(ide_hwif_t *);
-u8 ide_read_sff_dma_status(ide_hwif_t *);
 
 void ide_set_irq(ide_hwif_t *, int);
 
@@ -1458,6 +1461,7 @@ void ide_dma_exec_cmd(ide_drive_t *, u8);
 extern void ide_dma_start(ide_drive_t *);
 int ide_dma_end(ide_drive_t *);
 int ide_dma_test_irq(ide_drive_t *);
+u8 ide_dma_sff_read_status(ide_hwif_t *);
 extern const struct ide_dma_ops sff_dma_ops;
 #else
 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }