5128f7357c
I have been debugging the usb problems some more. Your were right in your assumption (thanks for the pointer) about lack of calls to bus_dmamap_sync(). In usbdi.c bus_dmamap_sync() does get used for transfers that move data from PC to USB and it is used for transfers that move data from USB to PC. But someone forgot that control transfers consist of possibly two data chunks : the request itself and optionally a buffer of data that should be transfered to or from the USB device. On requests to the control endpoint without additional data bus_dmamap_sync() didn't get called. For some reason my first tests with umass worked (due to enough cache poisening I guess). The attached patch adds a call to bus_dmamap_sync() to usbdi.c and now all devices I have tried work out of the box. I have successfully transfered large files using the if_axe driver and I have mounted several different umass devices. submitted by: Daan Vreeken sponsored by: Vitsch Electronics reviewed by: cognet@