Re: autosuspend for HID devices, take #2
Oliver Neukum <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Organization | Novell |
| Message-ID | <[email protected]> |
Am Dienstag, 22. Mai 2007 18:50 schrieb Jiri Kosina: > I think that this is unfortunately not true. Let's take system with > multiple keyboards and their LEDs as an excellent example again. If you > kill the interrupt URB, there is nothing what will prevent other keyboard > (PS/2 or even USB keyboard, which is not yet suspended) to generate an > input event (user presses CapsLock/NumLock at a 'right' time). Then you'll > get out of sync, won't you? Not only will you get out of sync, you'll activate DMA on a system going to snapshot or switching off DMA coherence. This box will suffer memory corruption. Regards Oliver ------------------------------------------------------------------------- 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