From c72c5250224d475614a00c1d7e54a67f77cd3410 Mon Sep 17 00:00:00 2001
From: Roland Dreier <roland@purestorage.com>
Date: Wed, 22 Jul 2015 15:08:18 -0700
Subject: [PATCH] target: allow underflow/overflow for PR OUT etc. commands
It's not necessarily a fatal error if a command with a data-out phase
has a data length that differs from the transport data length (e.g.
PERSISTENT RESERVE OUT might have a parameter list length in the CDB
that's smaller than the FC_DL field), so allow these commands. The
Windows compliance test sends them.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Spencer Baugh <sbaugh@catern.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
---
drivers/target/target_core_transport.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 98155db28365..729ec7345e99 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1088,9 +1088,9 @@ target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
" 0x%02x\n", cmd->se_tfo->get_fabric_name(),
cmd->data_length, size, cmd->t_task_cdb[0]);
- if (cmd->data_direction == DMA_TO_DEVICE) {
- pr_err("Rejecting underflow/overflow"
- " WRITE data\n");
+ if (cmd->data_direction == DMA_TO_DEVICE &&
+ cmd->se_cmd_flags & SCF_SCSI_DATA_CDB) {
+ pr_err("Rejecting underflow/overflow WRITE data\n");
return TCM_INVALID_CDB_FIELD;
}
/*
--
2.51.0