[SCSI] iscsi_tcp: return a descriptive error value during connection errors

The segment->done functions return a iscsi error value which gives
a lot more info than conn failed, so this patch has us return
that value. I also add a new one for xmit failures.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 4f096de81525..ed6c54cae7b1 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -979,7 +979,7 @@ iscsi_tcp_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
 
 error:
         debug_tcp("Error receiving PDU, errno=%d\n", rc);
-        iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
+        iscsi_conn_failure(conn, rc);
         return 0;
 }
 
@@ -1098,8 +1098,10 @@ iscsi_xmit(struct iscsi_conn *conn)
 
         while (1) {
                 rc = iscsi_tcp_xmit_segment(tcp_conn, segment);
-                if (rc < 0)
+                if (rc < 0) {
+                        rc = ISCSI_ERR_XMIT_FAILED;
                         goto error;
+                }
                 if (rc == 0)
                         break;
 
@@ -1108,7 +1110,7 @@ iscsi_xmit(struct iscsi_conn *conn)
                 if (segment->total_copied >= segment->total_size) {
                         if (segment->done != NULL) {
                                 rc = segment->done(tcp_conn, segment);
-                                if (rc < 0)
+                                if (rc != 0)
                                         goto error;
                         }
                 }
@@ -1123,8 +1125,8 @@ error:
         /* Transmit error. We could initiate error recovery
          * here. */
         debug_tcp("Error sending PDU, errno=%d\n", rc);
-        iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
-        return rc;
+        iscsi_conn_failure(conn, rc);
+        return -EIO;
 }
 
 /**