1 files changed, 28 insertions, 0 deletions

diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 30a83a57a12f..d4b80b64342c 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -1355,6 +1355,34 @@ static void ata_eh_report(struct ata_port *ap)
         }
 }
 
+static int ata_do_reset(struct ata_port *ap, ata_reset_fn_t reset,
+                        unsigned int *classes)
+{
+        int i, rc;
+
+        for (i = 0; i < ATA_MAX_DEVICES; i++)
+                classes[i] = ATA_DEV_UNKNOWN;
+
+        rc = reset(ap, classes);
+        if (rc)
+                return rc;
+
+        /* If any class isn't ATA_DEV_UNKNOWN, consider classification
+         * is complete and convert all ATA_DEV_UNKNOWN to
+         * ATA_DEV_NONE.
+         */
+        for (i = 0; i < ATA_MAX_DEVICES; i++)
+                if (classes[i] != ATA_DEV_UNKNOWN)
+                        break;
+
+        if (i < ATA_MAX_DEVICES)
+                for (i = 0; i < ATA_MAX_DEVICES; i++)
+                        if (classes[i] == ATA_DEV_UNKNOWN)
+                                classes[i] = ATA_DEV_NONE;
+
+        return 0;
+}
+
 static int ata_eh_followup_srst_needed(int rc, int classify,
                                        const unsigned int *classes)
 {