1 files changed, 27 insertions, 18 deletions

diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index 1c33f78040c6..f6d80e342310 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -60,7 +60,8 @@ acpi_handle ata_ap_acpi_handle(struct ata_port *ap)
         if (ap->flags & ATA_FLAG_ACPI_SATA)
                 return NULL;
 
-        return acpi_get_child(DEVICE_ACPI_HANDLE(ap->host->dev), ap->port_no);
+        return ap->scsi_host ?
+                DEVICE_ACPI_HANDLE(&ap->scsi_host->shost_gendev) : NULL;
 }
 EXPORT_SYMBOL(ata_ap_acpi_handle);
 
@@ -239,28 +240,15 @@ void ata_acpi_dissociate(struct ata_host *host)
         }
 }
 
-/**
- * ata_acpi_gtm - execute _GTM
- * @ap: target ATA port
- * @gtm: out parameter for _GTM result
- *
- * Evaluate _GTM and store the result in @gtm.
- *
- * LOCKING:
- * EH context.
- *
- * RETURNS:
- * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
- */
-int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
+static int __ata_acpi_gtm(struct ata_port *ap, acpi_handle handle,
+                          struct ata_acpi_gtm *gtm)
 {
         struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
         union acpi_object *out_obj;
         acpi_status status;
         int rc = 0;
 
-        status = acpi_evaluate_object(ata_ap_acpi_handle(ap), "_GTM", NULL,
-                                      &output);
+        status = acpi_evaluate_object(handle, "_GTM", NULL, &output);
 
         rc = -ENOENT;
         if (status == AE_NOT_FOUND)
@@ -294,6 +282,27 @@ int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
         return rc;
 }
 
+/**
+ * ata_acpi_gtm - execute _GTM
+ * @ap: target ATA port
+ * @gtm: out parameter for _GTM result
+ *
+ * Evaluate _GTM and store the result in @gtm.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
+ */
+int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
+{
+        if (ata_ap_acpi_handle(ap))
+                return __ata_acpi_gtm(ap, ata_ap_acpi_handle(ap), gtm);
+        else
+                return -EINVAL;
+}
+
 EXPORT_SYMBOL_GPL(ata_acpi_gtm);
 
 /**
@@ -1047,7 +1056,7 @@ static int ata_acpi_bind_host(struct ata_port *ap, acpi_handle *handle)
         if (!*handle)
                 return -ENODEV;
 
-        if (ata_acpi_gtm(ap, &ap->__acpi_init_gtm) == 0)
+        if (__ata_acpi_gtm(ap, *handle, &ap->__acpi_init_gtm) == 0)
                 ap->pflags |= ATA_PFLAG_INIT_GTM_VALID;
 
         return 0;