From: Mathias Nyman
> Sent: 23 January 2017 12:20
> If we just provide a helper to convert completion code to string, we can
> combine all debugging messages into a single print.
...
> diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
> index aa63e38..ebdd920 100644
> --- a/drivers/usb/host/xhci.h
> +++ b/drivers/usb/host/xhci.h
> @@ -1097,6 +1097,86 @@ struct xhci_transfer_event {
> #define COMP_SECONDARY_BANDWIDTH_ERROR 35
> #define COMP_SPLIT_TRANSACTION_ERROR 36
>
> +static inline const char *xhci_trb_comp_code_string(u8 status)
> +{
> + switch (status) {
> + case COMP_INVALID:
> + return "Invalid";
...
> + case COMP_SPLIT_TRANSACTION_ERROR:
> + return "Split Transaction Error";
> + default:
> + return "Unknown!!";
> + }
> +}
That ought to be a real function, not a static inline.
Will generate a lot of code and data if inlined.
If the error codes are reasonable dense then an array is much better
than the switch statement.
David
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