From 7fe457cea872538a23648f6942cb89c1d3a9c003 Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Date: Mon, 18 Apr 2011 17:31:47 +1000
Subject: [PATCH] We can get over/underflow residuals in a DATA-IN segment
 if/when the S bit is set too.

---
 lib/scsi-command.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/scsi-command.c b/lib/scsi-command.c
index c1c169e..f2469a5 100644
--- a/lib/scsi-command.c
+++ b/lib/scsi-command.c
@@ -455,6 +455,21 @@ iscsi_process_scsi_data_in(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
 		return 0;
 	}
 
+	task->residual_status = SCSI_RESIDUAL_NO_RESIDUAL;
+	task->residual = 0;
+
+	/*
+	 * These flags should only be set if the S flag is also set
+	 */
+	if (flags & (ISCSI_PDU_DATA_RESIDUAL_OVERFLOW|ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW)) {
+		task->residual = ntohl(*((uint32_t *)&in->hdr[44]));
+		if (flags & ISCSI_PDU_DATA_RESIDUAL_UNDERFLOW) {
+			task->residual_status = SCSI_RESIDUAL_UNDERFLOW;
+		} else {
+			task->residual_status = SCSI_RESIDUAL_OVERFLOW;
+		}
+	}
+
 
 	/* this was the final data-in packet in the sequence and it has
 	 * the s-bit set, so invoke the callback.