2010/8/14 Dennis Nezic <dennisn@xxxxxxxxxxxxxxxxxx>: > My usb2.0 multi-card reader, 058f:6366 Alcor Micro Corp., with vanilla > kernel 2.6.35.1, doesn't seem to work with ehci_hcb. It does work with > ohci_hcb, so I don't think it's a hardware problem necessarily? > > Here is my syslog when using EHCI: > http://dennisn.dyndns.org/guest/pubstuff/ehci-bug/ehci-fails.log > > Here is my syslog when using OHCI: > http://dennisn.dyndns.org/guest/pubstuff/ehci-bug/ohci-works.log > > The main differences that I notice are many "detected XactErr"s with > ehci, but they don't seem to be too critical, until they (seem to) > cause: > > 09:14:30 kernel: ehci_hcd 0000:00:13.2: devpath 8 ep2in 3strikes > 09:14:30 kernel: usb-storage: Status code -71; transferred 76288/98304 > 09:14:30 kernel: usb-storage: -- unknown error > 09:14:30 kernel: usb-storage: Bulk data transfer result 0x4 > 09:14:30 kernel: usb-storage: -- transport indicates error, resetting > > ... which seems to happen with "usb_stor_bulk_transfer_sglist: xfer" > greater than about 512 bytes? (The transfers seem to complete with > smaller xfers?) > > Ideas? Suggestions? You may connect your card-reader into windows machine to see if there is the similar issue. I guess it may not work steadily at high speed on windows too. Maybe windows hcd can degrade to full speed for your card reader. --- Lei Ming -- 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
