On Wednesday 18 October 2006 12:48 am, Jayaprakash Shanmugam wrote: > Hello All, > > I am using Philips ISP 1561 PCI - USB with PQ2FADS based board. I > have a couple of USB devices connected to it. Both of them are > working in high speed. In one of the devices, every 10ms bulk read > request is called. The console prints the following message > continuously. Can you help us on what could be wrong ?
Two things are wrong. One is that Alan Stern mentioned, you turned on debugging messages (these aren't "verbose" though), so if you don't want them you should turn them off. The other is that these messages do NOT come out for bulk transfers; in this case you're issuing interrupt transfer requests. So if that matters, you've got a driver bug ... and in fact, using interrupt transfers in that mode is a bad idea, so you should fix it so that either you _do_ issue bulk reads, or else so that you use interrupt transfers correctly. The reason those scheduling messages come out so much is exactly that your driver is doing something wrong ... constantly scheduling and descheduling an interrupt transfer. It should work OK, but the flood of messages did indicate that something was going wrong. Next time, don't forget to use "grep" to find out where the messages are coming from ... then start working back from there to what the root cause of the problem might be. In this case it should have been quickly apparent that your "bulk" operations were going astray... - Dave > Thanks, > Jayaprakash. > > ehci_hcd 0000:00:0b.2: reused qh c05e3280 schedule > usb 1-4: link qh16-0001/c05e3280 start 15 [17/0 us] > usb 1-4: unlink qh16-0001/c05e3280 start 15 [17/0 us] > ehci_hcd 0000:00:0b.2: reused qh c05e3280 schedule > usb 1-4: link qh16-0001/c05e3280 start 15 [17/0 us] > ... ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
