3 files changed, 13 insertions, 3 deletions

diff --git a/drivers/ata/pata_legacy.c b/drivers/ata/pata_legacy.c
index 4223e10de6a0..98c1fee4b305 100644
--- a/drivers/ata/pata_legacy.c
+++ b/drivers/ata/pata_legacy.c
@@ -89,9 +89,10 @@ static int probe_all;			/* Set to check all ISA port ranges */
 static int ht6560a;                     /* HT 6560A on primary 1, secondary 2, both 3 */
 static int ht6560b;                     /* HT 6560A on primary 1, secondary 2, both 3 */
 static int opti82c611a;                 /* Opti82c611A on primary 1, secondary 2, both 3 */
-static int opti82c46x;          /* Opti 82c465MV present (pri/sec autodetect) */
+static int opti82c46x;                  /* Opti 82c465MV present (pri/sec autodetect) */
 static int autospeed;                   /* Chip present which snoops speed changes */
 static int pio_mask = 0x1F;             /* PIO range for autospeed devices */
+static int iordy_mask = 0xFFFFFFFF;     /* Use iordy if available */
 
 /**
  *      legacy_set_mode         -       mode setting
@@ -113,6 +114,7 @@ static int legacy_set_mode(struct ata_port *ap, struct ata_device **unused)
         for (i = 0; i < ATA_MAX_DEVICES; i++) {
                 struct ata_device *dev = &ap->device[i];
                 if (ata_dev_enabled(dev)) {
+                        ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
                         dev->pio_mode = XFER_PIO_0;
                         dev->xfer_mode = XFER_PIO_0;
                         dev->xfer_shift = ATA_SHIFT_PIO;
@@ -695,6 +697,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
         void __iomem *io_addr, *ctrl_addr;
         int pio_modes = pio_mask;
         u32 mask = (1 << port);
+        u32 iordy = (iordy_mask & mask) ? 0: ATA_FLAG_NO_IORDY;
         int ret;
 
         pdev = platform_device_register_simple(DRV_NAME, nr_legacy_host, NULL, 0);
@@ -715,6 +718,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
         if (ht6560a & mask) {
                 ops = &ht6560a_port_ops;
                 pio_modes = 0x07;
+                iordy = ATA_FLAG_NO_IORDY;
         }
         if (ht6560b & mask) {
                 ops = &ht6560b_port_ops;
@@ -750,6 +754,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
                         printk(KERN_INFO "PDC20230-C/20630 VLB ATA controller detected.\n");
                                 pio_modes = 0x07;
                         ops = &pdc20230_port_ops;
+                        iordy = ATA_FLAG_NO_IORDY;
                         udelay(100);
                         inb(0x1F5);
                 } else {
@@ -767,6 +772,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
         /* Chip does mode setting by command snooping */
         if (ops == &legacy_port_ops && (autospeed & mask))
                 ops = &simple_port_ops;
+
         memset(&ae, 0, sizeof(struct ata_probe_ent));
         INIT_LIST_HEAD(&ae.node);
         ae.dev = &pdev->dev;
@@ -776,7 +782,7 @@ static __init int legacy_init_one(int port, unsigned long io, unsigned long ctrl
         ae.pio_mask = pio_modes;
         ae.irq = irq;
         ae.irq_flags = 0;
-        ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST;
+        ae.port_flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST|iordy;
         ae.port[0].cmd_addr = io_addr;
         ae.port[0].altstatus_addr = ctrl_addr;
         ae.port[0].ctl_addr = ctrl_addr;
@@ -945,6 +951,7 @@ module_param(ht6560b, int, 0);
 module_param(opti82c611a, int, 0);
 module_param(opti82c46x, int, 0);
 module_param(pio_mask, int, 0);
+module_param(iordy_mask, int, 0);
 
 module_init(legacy_init);
 module_exit(legacy_exit);
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
index 1b3b4ed8eb19..4362141976ad 100644
--- a/drivers/ata/pata_qdi.c
+++ b/drivers/ata/pata_qdi.c
@@ -264,16 +264,18 @@ static __init int qdi_init_one(unsigned long port, int type, unsigned long io, i
         if (type == 6580) {
                 ae.port_ops = &qdi6580_port_ops;
                 ae.pio_mask = 0x1F;
+                ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
         } else {
                 ae.port_ops = &qdi6500_port_ops;
                 ae.pio_mask = 0x07;     /* Actually PIO3 !IORDY is possible */
+                ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST |
+                                ATA_FLAG_NO_IORDY;
         }
 
         ae.sht = &qdi_sht;
         ae.n_ports = 1;
         ae.irq = irq;
         ae.irq_flags = 0;
-        ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
         ae.port[0].cmd_addr = io_addr;
         ae.port[0].altstatus_addr = ctl_addr;
         ae.port[0].ctl_addr = ctl_addr;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 596e0c18887d..b870b20df43c 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -172,6 +172,7 @@ enum {
         ATA_FLAG_DEBUGMSG       = (1 << 13),
         ATA_FLAG_SETXFER_POLLING= (1 << 14), /* use polling for SETXFER */
         ATA_FLAG_IGN_SIMPLEX    = (1 << 15), /* ignore SIMPLEX */
+        ATA_FLAG_NO_IORDY       = (1 << 16), /* controller lacks iordy */
 
         /* The following flag belongs to ap->pflags but is kept in
          * ap->flags because it's referenced in many LLDs and will be