Re: Bug creating USB endpoints in 2.6.20.x (kernel bug 8198)
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 3 May 2007, Chris Rankin wrote: > --- Tejun Heo <[email protected]> wrote: > > I see. They're static alright. That leaves us with sd pointing to > > the wrong attr. I'll take a look whether that's possible. > > I put a few printks in sysfs_remove_file() to see precisely what winecfg is doing, and it looks as > if the ALSA OSS emulation layer is repeatedly choosing which interface it should be using for the > webcam's microphone device: There's nothing wrong with that. A driver is allowed to change its interface's altsetting (i.e., call usb_set_interface()) whenever it wants to. There isn't even a locking requirement. > So does this imply there's a race condition in here somewhere? There may indeed be a race condition somewhere, but so far you haven't proved there is or pinned down exactly where. Alan Stern ------------------------------------------------------------------------- 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