v4.19.13 snapshot.
diff --git a/drivers/scsi/libsas/sas_task.c b/drivers/scsi/libsas/sas_task.c
new file mode 100644
index 0000000..a78e5bd
--- /dev/null
+++ b/drivers/scsi/libsas/sas_task.c
@@ -0,0 +1,37 @@
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <scsi/sas.h>
+#include <scsi/libsas.h>
+
+/* fill task_status_struct based on SSP response frame */
+void sas_ssp_task_response(struct device *dev, struct sas_task *task,
+ struct ssp_response_iu *iu)
+{
+ struct task_status_struct *tstat = &task->task_status;
+
+ tstat->resp = SAS_TASK_COMPLETE;
+
+ if (iu->datapres == 0)
+ tstat->stat = iu->status;
+ else if (iu->datapres == 1)
+ tstat->stat = iu->resp_data[3];
+ else if (iu->datapres == 2) {
+ tstat->stat = SAM_STAT_CHECK_CONDITION;
+ tstat->buf_valid_size =
+ min_t(int, SAS_STATUS_BUF_SIZE,
+ be32_to_cpu(iu->sense_data_len));
+ memcpy(tstat->buf, iu->sense_data, tstat->buf_valid_size);
+
+ if (iu->status != SAM_STAT_CHECK_CONDITION)
+ dev_printk(KERN_WARNING, dev,
+ "dev %llx sent sense data, but "
+ "stat(%x) is not CHECK CONDITION\n",
+ SAS_ADDR(task->dev->sas_addr),
+ iu->status);
+ }
+ else
+ /* when datapres contains corrupt/unknown value... */
+ tstat->stat = SAM_STAT_CHECK_CONDITION;
+}
+EXPORT_SYMBOL_GPL(sas_ssp_task_response);
+