target: Fix write payload exception handling with ->new_cmd_map

This patch fixes a bug for fabrics using tfo->new_cmd_map() that
are expect transport_generic_request_failure() to be calling
transport_send_check_condition_and_sense() for both READ and WRITE,
instead of only for READ exceptions.

This was originally observed with a failed WRITE_SAME_16 w/ unmap=0
using tcm_loop.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index cc5a339..fd7d451 100644 (file)
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2053,8 +2053,14 @@ static void transport_generic_request_failure(
                cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
                break;
        }
-
-       if (!sc)
+       /*
+        * If a fabric does not define a cmd->se_tfo->new_cmd_map caller,
+        * make the call to transport_send_check_condition_and_sense()
+        * directly.  Otherwise expect the fabric to make the call to
+        * transport_send_check_condition_and_sense() after handling
+        * possible unsoliticied write data payloads.
+        */
+       if (!sc && !cmd->se_tfo->new_cmd_map)
                transport_new_cmd_failure(cmd);
        else {
                ret = transport_send_check_condition_and_sense(cmd,