Hi! We are facing here kernel oopes in the USB-Gadget driver serial.
Quiet seldomly the kernel oopses during heavy load on the serial line. The pc value of the Oops points not always to the same function, but always near to places where the list &dev->dev_req_list is in use. So we got the idea that somehow this list was corrupted. By further investigation we found that in callback-funktion gs_write_complete the list is only protected with spin_lock/spin_unlock. To my knowledge the callback is most time called in interrupt. But it is also called outside of interrupt and then there would be no proctection from race conditions. What do you think? Best regards Thomas Brinker -- Dipl.-Ing. Thomas Brinker, emlix GmbH, http://www.emlix.com Fon +49 30 275911-00, Fax -33, Poststr. 4/5, 10178 Berlin, Germany Geschäftsführung: Dr. Uwe Kracke, Dr. Cord Seele, Ust-IdNr.: DE 205 198 055 Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160 emlix - your embedded linux partner ------------------------------------------------------------------------- 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/ _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
