> -----Original Message----- > From: Eric Wittmayer [mailto:e...@frescologic.com] > Sent: Wednesday, June 24, 2015 12:13 AM > To: edk2-devel@lists.sourceforge.net; Anbazhagan, Baraneedharan > Subject: RE: [edk2] XHCI question > > > Date: Tue, 23 Jun 2015 23:16:05 +0000 > > From: "Anbazhagan, Baraneedharan" <anbazha...@hp.com> > > Subject: [edk2] XHCI question > > To: "edk2-devel@lists.sourceforge.net" > > <edk2-devel@lists.sourceforge.net>, "Tian, Feng" > > <feng.t...@intel.com> > > Message-ID: > > <8530272280D33D4095B8F02BA1B57BAC409FB260@G9W0345.americ > > as.hpqcorp.net> > > > > Content-Type: text/plain; charset="us-ascii" > > > > Whether XhcCheckUrbResult returns correct error status in case of failure? > > XhcCheckUrbResult function header indicates it should report URB > > transfer state - Urb->Finished (seems to align with EhciDxe) but the > > implementation is trying to return EFI_STATUS and it doesn't get > > updated based on EvtTrb- > > >Completecode. With a failing drive, XhcExecTransfer returns > > >EFI_SUCCESS > in > > case of transaction error. > > > Looking at the source code for XhcCheckUrbResult, if you pass in a URB > Pointer, the > Urb->Result is updated with the completion code from the event. > Look for the switch on EvtTrb->Completecode. In the case where Urb is passed > in, > CheckedUrb == Urb. > EFI_STATUS that is returned indicates if the function actually checked any new > events. > > Regards, > Eric > If return value of XhcCheckUrbResult is a status of whether it checked any new events or not, then XhcBulkTransfer needs to be updated to return correct failure status to the caller instead of checking for EFI_USB_ERR_STALL and EFI_USB_NOERROR alone .
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