libata: kill dead code paths in reset path

Some code paths which had been made obsolete by recent reset
simplification were still around.  Kill them.

* ata_eh_reset() checked for ATA_DEV_UNKNOWN to determine
  classification failure.  This is no longer applicable.

* ata_do_reset() should convert ATA_DEV_UNKNOWN to ATA_DEV_NONE
  regardless of reset result (e.g. -EAGAIN).

* LLDs don't need to convert ATA_DEV_UNKNOWN to ATA_DEV_NONE.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

3 files changed, 1 insertions, 23 deletions

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 99f83bdc572b..88cdc4938bea 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2052,15 +2052,13 @@ static int ata_do_reset(struct ata_link *link, ata_reset_fn_t reset,
                 classes[dev->devno] = ATA_DEV_UNKNOWN;
 
         rc = reset(link, classes, deadline);
-        if (rc)
-                return rc;
 
         /* convert all ATA_DEV_UNKNOWN to ATA_DEV_NONE */
         ata_link_for_each_dev(dev, link)
                 if (classes[dev->devno] == ATA_DEV_UNKNOWN)
                         classes[dev->devno] = ATA_DEV_NONE;
 
-        return 0;
+        return rc;
 }
 
 static int ata_eh_followup_srst_needed(struct ata_link *link,
@@ -2209,21 +2207,6 @@ int ata_eh_reset(struct ata_link *link, int classify,
         if (rc && rc != -EAGAIN)
                 goto fail;
 
-        /* was classification successful? */
-        if (classify && classes[0] == ATA_DEV_UNKNOWN &&
-            !(lflags & ATA_LFLAG_ASSUME_CLASS)) {
-                if (try < max_tries) {
-                        ata_link_printk(link, KERN_WARNING,
-                                        "classification failed\n");
-                        rc = -EINVAL;
-                        goto fail;
-                }
-
-                ata_link_printk(link, KERN_WARNING,
-                                "classfication failed, assuming ATA\n");
-                lflags |= ATA_LFLAG_ASSUME_ATA;
-        }
-
  done:
         ata_link_for_each_dev(dev, link) {
                 /* After the reset, the device state is PIO 0 and the
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index 9f47d0022453..d27bb9a2568f 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -428,8 +428,6 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,
 
                 ata_sff_tf_read(ap, &tf);
                 *class = ata_dev_classify(&tf);
-                if (*class == ATA_DEV_UNKNOWN)
-                        *class = ATA_DEV_NONE;
         }
 
         return 0;
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 068789361895..20757fa6115d 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -693,9 +693,6 @@ static int sil24_softreset(struct ata_link *link, unsigned int *class,
         sil24_read_tf(ap, 0, &tf);
         *class = ata_dev_classify(&tf);
 
-        if (*class == ATA_DEV_UNKNOWN)
-                *class = ATA_DEV_NONE;
-
  out:
         DPRINTK("EXIT, class=%u\n", *class);
         return 0;