Add helper to convert message byte into a host byte code.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
---
include/scsi/scsi_cmnd.h | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index 2c7b4102aa14..69055c2044ff 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -336,6 +336,32 @@ static inline u8 get_host_byte(struct scsi_cmnd *cmd)
return (cmd->result >> 16) & 0xff;
}
+/**
+ * scsi_msg_to_host_byte() - translate message byte
+ *
+ * Translate the SCSI parallel message byte to a matching
+ * host byte setting. A message of COMMAND_COMPLETE indicates
+ * a successful command execution, any other message indicate
+ * an error. As the messages themselves only have a meaning
+ * for the SCSI parallel protocol this function translates
+ * them into a matching host byte value for SCSI EH.
+ */
+static inline void scsi_msg_to_host_byte(struct scsi_cmnd *cmd, u8 msg)
+{
+ switch (msg) {
+ case COMMAND_COMPLETE:
+ break;
+ case ABORT_TASK_SET:
+ set_host_byte(cmd, DID_ABORT);
+ break;
+ case TARGET_RESET:
+ set_host_byte(cmd, DID_RESET);
+ break;
+ default:
+ set_host_byte(cmd, DID_ERROR);
+ break;
+ }
+}
static inline unsigned scsi_transfer_length(struct scsi_cmnd *scmd)
{
--
2.29.2
