Commit dc2c037f authored by Hikaru Nishida's avatar Hikaru Nishida Committed by Gerd Hoffmann
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xhci: Add No Op Command 



This commit adds No Op Command (23) to xHC for verifying the operation
of the Command Ring mechanisms.
No Op Command is defined in XHCI spec (4.6.2) and just reports Command
Completion Event with Completion Code == Success.
Before this commit, No Op Command is not implemented so xHC reports
Command Completion Event with Completion Code == TRB Error. This commit
fixes this behaviour to report Completion Code correctly.

Signed-off-by: default avatarHikaru Nishida <hikarupsp@gmail.com>
Message-id: 20190720060427.50457-1-hikarupsp@gmail.com
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent baeed705

hw/usb/hcd-xhci.c

+3 −0
Original line number Diff line number Diff line
@@ -2543,6 +2543,9 @@ static void xhci_process_commands(XHCIState *xhci) 
        case CR_GET_PORT_BANDWIDTH:

            event.ccode = xhci_get_port_bandwidth(xhci, trb.parameter);

            break;

        case CR_NOOP:

            event.ccode = CC_SUCCESS;

            break;

        case CR_VENDOR_NEC_FIRMWARE_REVISION:

            if (xhci->nec_quirks) {

                event.type = 48; /* NEC reply */