scst_vdisk: Add a comment

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@7983 d57e44dd-8a1f-0410-8b47-8ef2f437770f

scst/src/dev_handlers/scst_vdisk.c

@@ -5677,6 +5677,11 @@ static enum compl_status_e fileio_exec_var_len_cmd(struct vdisk_cmd_params *p)
 	return res;
 }
 
+/*
+ * Execute a SCSI write command against a file. If this function returns
+ * RUNNING_ASYNC the SCST command may already have completed before this
+ * function returns.
+ */
 static enum compl_status_e fileio_exec_write(struct vdisk_cmd_params *p)
 {
 	struct scst_cmd *cmd = p->cmd;