[RESEND PATCH 1/3] scsi: target: core: Set residuals for 4Kn devices

[Anastasia Kovaleva <a.kovaleva@yadro.com>]

From: Roman Bolshakov <r.bolshakov@yadro.com>

TCM always fails SBC commands with residuals for 4Kn devices when the
command is processed by sbc_parse_cdb(). That prevents residual
signalling to the transport driver because residual kind and residual
amount aren't set. It also makes residual handling different from
512-byte formatted devices - if there are residuals 512-byte LUN would
proceed with command execution while 4K-byte LUN would fail.

Based-on: https://patchwork.kernel.org/project/target-devel/patch/20170523234854.21452-31-bart.vanassche@sandisk.com/
Based-on-patch-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Konstantin Vinogradov <k.vinogradov@yadro.com>
---
 drivers/target/target_core_transport.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index fca4bd079d02..f27a7d6cc1e0 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1332,17 +1332,6 @@ target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
 				return TCM_INVALID_CDB_FIELD;
 			}
 		}
-		/*
-		 * Reject READ_* or WRITE_* with overflow/underflow for
-		 * type SCF_SCSI_DATA_CDB.
-		 */
-		if (dev->dev_attrib.block_size != 512)  {
-			pr_err("Failing OVERFLOW/UNDERFLOW for LBA op"
-				" CDB on non 512-byte sector setup subsystem"
-				" plugin: %s\n", dev->transport->name);
-			/* Returns CHECK_CONDITION + INVALID_CDB_FIELD */
-			return TCM_INVALID_CDB_FIELD;
-		}
 		/*
 		 * For the overflow case keep the existing fabric provided
 		 * ->data_length.  Otherwise for the underflow case, reset
-- 
2.24.3 (Apple Git-128)