libata: update ata_dev_try_classify() arguments

Make ata_dev_try_classify() take a pointer to ata_device instead of
ata_port/port_number combination for consistency and add @present
argument.  @present indicates whether the device seems present during
reset.  It's the result of TF access during softreset and link
onlineness during hardreset.  @present will be used to improve
diagnostic failure handling.

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

3 files changed, 21 insertions, 17 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b01b5a897dcf..ea8c07b04f29 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -701,8 +701,8 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
 
 /**
  *      ata_dev_try_classify - Parse returned ATA device signature
- *      @ap: ATA channel to examine
- *      @device: Device to examine (starting at zero)
+ *      @dev: ATA device to classify (starting at zero)
+ *      @present: device seems present
  *      @r_err: Value of error register on completion
  *
  *      After an event -- SRST, E.D.D., or SATA COMRESET -- occurs,
@@ -720,15 +720,15 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
  *      RETURNS:
  *      Device type - %ATA_DEV_ATA, %ATA_DEV_ATAPI or %ATA_DEV_NONE.
  */
-
-unsigned int
-ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
+unsigned int ata_dev_try_classify(struct ata_device *dev, int present,
+                                  u8 *r_err)
 {
+        struct ata_port *ap = dev->link->ap;
         struct ata_taskfile tf;
         unsigned int class;
         u8 err;
 
-        ap->ops->dev_select(ap, device);
+        ap->ops->dev_select(ap, dev->devno);
 
         memset(&tf, 0, sizeof(tf));
 
@@ -738,12 +738,12 @@ ata_dev_try_classify(struct ata_port *ap, unsigned int device, u8 *r_err)
                 *r_err = err;
 
         /* see if device passed diags: if master then continue and warn later */
-        if (err == 0 && device == 0)
+        if (err == 0 && dev->devno == 0)
                 /* diagnostic fail : do nothing _YET_ */
-                ap->link.device[device].horkage |= ATA_HORKAGE_DIAGNOSTIC;
+                dev->horkage |= ATA_HORKAGE_DIAGNOSTIC;
         else if (err == 1)
                 /* do nothing */ ;
-        else if ((device == 0) && (err == 0x81))
+        else if ((dev->devno == 0) && (err == 0x81))
                 /* do nothing */ ;
         else
                 return ATA_DEV_NONE;
@@ -3238,9 +3238,9 @@ void ata_bus_reset(struct ata_port *ap)
         /*
          * determine by signature whether we have ATA or ATAPI devices
          */
-        device[0].class = ata_dev_try_classify(ap, 0, &err);
+        device[0].class = ata_dev_try_classify(&device[0], dev0, &err);
         if ((slave_possible) && (err != 0x81))
-                device[1].class = ata_dev_try_classify(ap, 1, &err);
+                device[1].class = ata_dev_try_classify(&device[1], dev1, &err);
 
         /* is double-select really necessary? */
         if (device[1].class != ATA_DEV_NONE)
@@ -3479,9 +3479,11 @@ int ata_std_softreset(struct ata_link *link, unsigned int *classes,
         }
 
         /* determine by signature whether we have ATA or ATAPI devices */
-        classes[0] = ata_dev_try_classify(ap, 0, &err);
+        classes[0] = ata_dev_try_classify(&link->device[0],
+                                          devmask & (1 << 0), &err);
         if (slave_possible && err != 0x81)
-                classes[1] = ata_dev_try_classify(ap, 1, &err);
+                classes[1] = ata_dev_try_classify(&link->device[1],
+                                                  devmask & (1 << 1), &err);
 
  out:
         DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
@@ -3600,7 +3602,7 @@ int sata_std_hardreset(struct ata_link *link, unsigned int *class,
 
         ap->ops->dev_select(ap, 0);     /* probably unnecessary */
 
-        *class = ata_dev_try_classify(ap, 0, NULL);
+        *class = ata_dev_try_classify(link->device, 1, NULL);
 
         DPRINTK("EXIT, class=%u\n", *class);
         return 0;
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index 2153def3f345..941b72bec836 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -636,9 +636,11 @@ static int scc_std_softreset (struct ata_port *ap, unsigned int *classes,
         }
 
         /* determine by signature whether we have ATA or ATAPI devices */
-        classes[0] = ata_dev_try_classify(ap, 0, &err);
+        classes[0] = ata_dev_try_classify(&ap->link.device[0],
+                                          devmask & (1 << 0), &err);
         if (slave_possible && err != 0x81)
-                classes[1] = ata_dev_try_classify(ap, 1, &err);
+                classes[1] = ata_dev_try_classify(&ap->link.device[1],
+                                                  devmask & (1 << 1), &err);
 
  out:
         DPRINTK("EXIT, classes[0]=%u [1]=%u\n", classes[0], classes[1]);
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 08077efa9afd..4df8311968e9 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2248,7 +2248,7 @@ comreset_retry:
          */
 
         /* finally, read device signature from TF registers */
-        *class = ata_dev_try_classify(ap, 0, NULL);
+        *class = ata_dev_try_classify(ap->link.device, 1, NULL);
 
         writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);