Logging communication with devices

[Peter Senna Tschudin]

Does Linux provide an elegant and/or standard way of logging
communication with devices that manage buffers and that can help me
improve code like:

$ cat drivers/usb/host/fotg210-hcd.c
...
                temp = snprintf(next, size,
                                "\n\t%p%c%s len=%d %08x urb %p",
                                td, mark, ({ char *tmp;
                                 switch ((scratch>>8)&0x03) {
                                 case 0:
                                        tmp = "out";
                                        break;
                                 case 1:
                                        tmp = "in";
                                        break;
                                 case 2:
                                        tmp = "setup";
                                        break;
                                 default:
                                        tmp = "?";
                                        break;
                                 } tmp; }),
                                (scratch >> 16) & 0x7fff,
                                scratch,
                                td->urb);


-- 
Peter