On Fri, 8 Mar 2013, Roger Quadros wrote: > On 03/04/2013 05:36 AM, Ming Lei wrote: > > On Tue, Feb 26, 2013 at 4:54 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > > >> > >> I'd be interested to hear the results of testing on a variety of > >> controllers. (This computer also has an NEC EHCI controller, and that > >> one does not have the bug.) Do the EHCI controllers on current Intel > >> chipsets pass the test? What about other vendors? > > > > No the 'EHCI hardware bug detected' error are observed on EHCI > > of OMAP4 pandaboard. > > > > On OMAP4 panda I was observing the same URB timeout message as Clemens. > After applying Clemens' fix [1] to the test code I can't see the problems > on OMAP4 Panda anymore. So OMAP EHCI is not affected. The patch by Clemens fixes an error that gets detected by the device, not by the host. That's why the original, unpatched program worked with some flash drives but not others -- not all drives are careful about checking for errors. > [1] http://marc.info/?l=linux-usb&m=136226443502631&w=2 > > Log below with Transcend Jetflash > > root@omaphost:~# ehci-test /dev/bus/usb/001/004 > [ 34.412078] usb-storage 1-1.3:1.0: disconnect by usbfs > 100 > 200 > 300 > 400 > 500 > 600 > 700 > 800 > 900 > 1000 > 1100 > 1200 > 1300 > 1400 > 1500 > 1600 > > cheers, > -roger Thanks for testing. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
