Date: Thu, 14 Oct 2010 23:10:31 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Weongyo Jeong <weongyo@freebsd.org> Cc: "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-user@freebsd.org" <svn-src-user@freebsd.org> Subject: Re: svn commit: r213847 - user/weongyo/usb/sys/dev/usb Message-ID: <201010142310.31272.hselasky@c2i.net> In-Reply-To: <20101014203932.GK38869@weongyo> References: <201010142219.08408.hselasky@c2i.net> <20101014203932.GK38869@weongyo>
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On Thursday 14 October 2010 22:39:32 Weongyo Jeong wrote: > On Thu, Oct 14, 2010 at 10:19:08PM +0200, Hans Petter Selasky wrote: > > On Thursday 14 October 2010 22:04:05 Weongyo Jeong wrote: > > > + for (i = 0; i < up->up_frames; i++) { > > > + if (ptr + sizeof(u_int32_t) >= end) > > > + goto done; > > > + *((u_int32_t *)ptr) = xfer->frlengths[i]; > > > + ptr += sizeof(u_int32_t); > > > + > > > + if (ptr + xfer->frlengths[i] >= end) > > > + goto done; > > > + usbd_get_page(&xfer->frbuffers[i], 0, &res); > > > + bcopy(res.buffer, ptr, xfer->frlengths[i]); > > > + ptr += xfer->frlengths[i]; > > > + } > > > > For isochronous transfers only the first frbuffer is used for all > > transfers, which are back to back. > > Do you mean that we should dump only xfer->frbuffers[0] even if > xfer->nframes > 1 for isochronous xfer? You should sum the frame lengths from 0 and upwards and use that for offset from xfer->frbuffers[0]. When the transfer is complete you need to know the old framelength, which I think there is already a variable for. --HPS
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