1 files changed, 14 insertions, 6 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c5ba15af87d3..5c84fb5c3372 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1043,8 +1043,8 @@ const char *sata_spd_string(unsigned int spd)
  *      None.
  *
  *      RETURNS:
- *      Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
- *      %ATA_DEV_UNKNOWN the event of failure.
+ *      Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP,
+ *      %ATA_DEV_ZAC, or %ATA_DEV_UNKNOWN the event of failure.
  */
 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
 {
@@ -1089,6 +1089,11 @@ unsigned int ata_dev_classify(const struct ata_taskfile *tf)
                 return ATA_DEV_SEMB;
         }
 
+        if ((tf->lbam == 0xcd) && (tf->lbah == 0xab)) {
+                DPRINTK("found ZAC device by sig\n");
+                return ATA_DEV_ZAC;
+        }
+
         DPRINTK("unknown device\n");
         return ATA_DEV_UNKNOWN;
 }
@@ -1329,7 +1334,7 @@ static int ata_hpa_resize(struct ata_device *dev)
         int rc;
 
         /* do we need to do it? */
-        if (dev->class != ATA_DEV_ATA ||
+        if ((dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) ||
             !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
             (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
                 return 0;
@@ -1889,6 +1894,7 @@ retry:
         case ATA_DEV_SEMB:
                 class = ATA_DEV_ATA;    /* some hard drives report SEMB sig */
         case ATA_DEV_ATA:
+        case ATA_DEV_ZAC:
                 tf.command = ATA_CMD_ID_ATA;
                 break;
         case ATA_DEV_ATAPI:
@@ -1980,7 +1986,7 @@ retry:
         rc = -EINVAL;
         reason = "device reports invalid type";
 
-        if (class == ATA_DEV_ATA) {
+        if (class == ATA_DEV_ATA || class == ATA_DEV_ZAC) {
                 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
                         goto err_out;
                 if (ap->host->flags & ATA_HOST_IGNORE_ATA &&
@@ -2015,7 +2021,8 @@ retry:
                         goto retry;
         }
 
-        if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
+        if ((flags & ATA_READID_POSTRESET) &&
+            (class == ATA_DEV_ATA || class == ATA_DEV_ZAC)) {
                 /*
                  * The exact sequence expected by certain pre-ATA4 drives is:
                  * SRST RESET
@@ -2280,7 +2287,7 @@ int ata_dev_configure(struct ata_device *dev)
                         sizeof(modelbuf));
 
         /* ATA-specific feature tests */
-        if (dev->class == ATA_DEV_ATA) {
+        if (dev->class == ATA_DEV_ATA || dev->class == ATA_DEV_ZAC) {
                 if (ata_id_is_cfa(id)) {
                         /* CPRM may make this media unusable */
                         if (id[ATA_ID_CFA_KEY_MGMT] & 1)
@@ -4033,6 +4040,7 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
         if (ata_class_enabled(new_class) &&
             new_class != ATA_DEV_ATA &&
             new_class != ATA_DEV_ATAPI &&
+            new_class != ATA_DEV_ZAC &&
             new_class != ATA_DEV_SEMB) {
                 ata_dev_info(dev, "class mismatch %u != %u\n",
                              dev->class, new_class);