linux-kernel - [PATCH] target: fix All_commands parameter data header size

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Message-Id: <20250115070739.216154-1-wdhh66@163.com>
Date: Wed, 15 Jan 2025 15:07:39 +0800
From: Chaohai Chen <wdhh66@....com>
To: martin.petersen@...cle.com
Cc: linux-scsi@...r.kernel.org,
	target-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Chaohai Chen <wdhh66@....com>
Subject: [PATCH] target: fix All_commands parameter data header size

The SPC document states that "The COMMAND DATA LENGTH field indicates the
length in bytes of the command descriptor list".

The length should be subtracted by 4 to represent
the length of the description list, not 3

Signed-off-by: Chaohai Chen <wdhh66@....com>
---
 drivers/target/target_core_spc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c
index ea14a3835681..61c065702350 100644
--- a/drivers/target/target_core_spc.c
+++ b/drivers/target/target_core_spc.c
@@ -2243,7 +2243,7 @@ spc_emulate_report_supp_op_codes(struct se_cmd *cmd)
 			response_length += spc_rsoc_encode_command_descriptor(
 					&buf[response_length], rctd, descr);
 		}
-		put_unaligned_be32(response_length - 3, buf);
+		put_unaligned_be32(response_length - 4, buf);
 	} else {
 		response_length = spc_rsoc_encode_one_command_descriptor(
 				&buf[response_length], rctd, descr,
-- 
2.34.1