[PATCH] libata: implement ata_dev_enabled and disabled()

This patch renames ata_dev_present() to ata_dev_enabled() and adds
ata_dev_disabled().  This is to discern the state where a device is
present but disabled from not-present state.  This disctinction is
necessary when configuring transfer mode because device selection
timing must not be violated even if a device fails to configure.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 12 insertions, 12 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 559abe4ea4e9..c10c550da38b 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -411,7 +411,7 @@ static const char *sata_spd_string(unsigned int spd)
 
 static void ata_dev_disable(struct ata_port *ap, struct ata_device *dev)
 {
-        if (ata_dev_present(dev)) {
+        if (ata_dev_enabled(dev)) {
                 printk(KERN_WARNING "ata%u: dev %u disabled\n",
                        ap->id, dev->devno);
                 dev->class++;
@@ -1222,7 +1222,7 @@ static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
         unsigned int xfer_mask;
         int i, rc;
 
-        if (!ata_dev_present(dev)) {
+        if (!ata_dev_enabled(dev)) {
                 DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
                         ap->id, dev->devno);
                 return 0;
@@ -1401,7 +1401,7 @@ static int ata_bus_probe(struct ata_port *ap)
 
                 dev->class = classes[i];
 
-                if (!ata_dev_present(dev))
+                if (!ata_dev_enabled(dev))
                         continue;
 
                 WARN_ON(dev->id != NULL);
@@ -1565,7 +1565,7 @@ void sata_phy_reset(struct ata_port *ap)
 struct ata_device *ata_dev_pair(struct ata_port *ap, struct ata_device *adev)
 {
         struct ata_device *pair = &ap->device[1 - adev->devno];
-        if (!ata_dev_present(pair))
+        if (!ata_dev_enabled(pair))
                 return NULL;
         return pair;
 }
@@ -1778,7 +1778,7 @@ static int ata_host_set_pio(struct ata_port *ap)
         for (i = 0; i < ATA_MAX_DEVICES; i++) {
                 struct ata_device *dev = &ap->device[i];
 
-                if (!ata_dev_present(dev))
+                if (!ata_dev_enabled(dev))
                         continue;
 
                 if (!dev->pio_mode) {
@@ -1802,7 +1802,7 @@ static void ata_host_set_dma(struct ata_port *ap)
         for (i = 0; i < ATA_MAX_DEVICES; i++) {
                 struct ata_device *dev = &ap->device[i];
 
-                if (!ata_dev_present(dev) || !dev->dma_mode)
+                if (!ata_dev_enabled(dev) || !dev->dma_mode)
                         continue;
 
                 dev->xfer_mode = dev->dma_mode;
@@ -1830,7 +1830,7 @@ static void ata_set_mode(struct ata_port *ap)
                 struct ata_device *dev = &ap->device[i];
                 unsigned int pio_mask, dma_mask;
 
-                if (!ata_dev_present(dev))
+                if (!ata_dev_enabled(dev))
                         continue;
 
                 ata_dev_xfermask(ap, dev);
@@ -1858,7 +1858,7 @@ static void ata_set_mode(struct ata_port *ap)
         for (i = 0; i < ATA_MAX_DEVICES; i++) {
                 struct ata_device *dev = &ap->device[i];
 
-                if (!ata_dev_present(dev))
+                if (!ata_dev_enabled(dev))
                         continue;
 
                 rc = ata_dev_set_mode(ap, dev);
@@ -2550,7 +2550,7 @@ int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
         u16 *id;
         int rc;
 
-        if (!ata_dev_present(dev))
+        if (!ata_dev_enabled(dev))
                 return -ENODEV;
 
         class = dev->class;
@@ -2679,7 +2679,7 @@ static void ata_dev_xfermask(struct ata_port *ap, struct ata_device *dev)
         /* FIXME: Use port-wide xfermask for now */
         for (i = 0; i < ATA_MAX_DEVICES; i++) {
                 struct ata_device *d = &ap->device[i];
-                if (!ata_dev_present(d))
+                if (!ata_dev_enabled(d))
                         continue;
                 xfer_mask &= ata_pack_xfermask(d->pio_mask, d->mwdma_mask,
                                                d->udma_mask);
@@ -4299,7 +4299,7 @@ int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
                 ap->flags &= ~ATA_FLAG_SUSPENDED;
                 ata_set_mode(ap);
         }
-        if (!ata_dev_present(dev))
+        if (!ata_dev_enabled(dev))
                 return 0;
         if (dev->class == ATA_DEV_ATA)
                 ata_start_drive(ap, dev);
@@ -4317,7 +4317,7 @@ int ata_device_resume(struct ata_port *ap, struct ata_device *dev)
  */
 int ata_device_suspend(struct ata_port *ap, struct ata_device *dev, pm_message_t state)
 {
-        if (!ata_dev_present(dev))
+        if (!ata_dev_enabled(dev))
                 return 0;
         if (dev->class == ATA_DEV_ATA)
                 ata_flush_cache(ap, dev);