Hello All, I was testing the USB capabilities of the au1500 and discovered that when a USB flash drive is removed during a copy operation twice, the USB host controller/root hub will no longer detect if the device is plugged in a third time. I am assuming there is a bug in the au1xxx parts of the USB drivers because Linux has been able to handle this case for some time with the standard EHCI/OHCI/UHCI host controllers. I am testing using the dbau1500 development board and the 2.6.12 kernel with the fs in ram. I would be interested if anyone has experienced anything similar with the au1500 and the 2.6.12 or other (earlier or later) kernels. The test goes something like this: Plug in the USB drive - it gets detected. (it does not seem to matter whether the drive is mounted or not, I tested both ways.) At the command prompt: #dd if=/dev/zero of=/dev/sda bs=1k count=50k after some time un-plug the drive. Error messages (too many to post) Repeat Third time device is not detected. I did not want to post a huge list of error messages, but I did notice differences between the first and second try. In the first, I got a lot of "rejecting I/O to device being removed" from scsi, while after the second removal I did not. Instead I got a lot of "Buffer I/O error on device sda" from scsi. I am actively looking in to the problem and wanted to post to the list in case someone else had come across this behaviour. I could list the error messages if anyone is interested. Any feedback would be appreciated. Thanks
