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-rw-r--r--drivers/target/target_core_transport.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 7f06a62f8661..652ef1c9a9f6 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1243,6 +1243,19 @@ target_check_max_data_sg_nents(struct se_cmd *cmd, struct se_device *dev,
return TCM_NO_SENSE;
}
+/**
+ * target_cmd_size_check - Check whether there will be a residual.
+ * @cmd: SCSI command.
+ * @size: Data buffer size derived from CDB. The data buffer size provided by
+ * the SCSI transport driver is available in @cmd->data_length.
+ *
+ * Compare the data buffer size from the CDB with the data buffer limit from the transport
+ * header. Set @cmd->residual_count and SCF_OVERFLOW_BIT or SCF_UNDERFLOW_BIT if necessary.
+ *
+ * Note: target drivers set @cmd->data_length by calling transport_init_se_cmd().
+ *
+ * Return: TCM_NO_SENSE
+ */
sense_reason_t
target_cmd_size_check(struct se_cmd *cmd, unsigned int size)
{