usb_control_msg() returns timeout !!
"Jayaprakash Shanmugam" <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
Hello Group, I have two devices connected to a host. I periodically read bulk data from first device and pass it on to the second device via EP-2. Apart from this periodic data, the host sends some vendor commands through EP-0 of first device. Though these vendor commands are received successfully by the device, usb_control_msg() returns -ETIMEDOUT error sometimes. If I stop sending the periodic bulk data, no -ETIMEDOUT is seen for the usb_control_msg(). I traced out the message.c file and it looks like the URB times out to call the timeout_kill() function. I even tried with a higher timeout, but no improvement is seen. Any pointers on what could have gone wrong ? I observed the same with both EHCI and OHCI drivers. The device is Cypress based, capable of USB2.0. The host runs 2.6.11 on MPC8270 with PCI-USB ISP1561. Regards, Jayaprakash. ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel