From: On Behalf Of Pete Zaitcev > On Thu, 2 Jun 2005 21:43:46 -0400, "Stuart MacDonald" > <[EMAIL PROTECTED]> wrote: > > > So, flush_to_ldisc() is running in interrupt context. It > can call back > > into usbserial.c in a number of ways, specifically serial_throttle. > > Which tries to acquire a semaphore, which sometimes sleeps, > resulting > > in a "scheduling in interrupt" crash. (In 2.6 the semaphore has been > > replaced with a work queue it looks like.) > > Are you talking about 2.4 or 2.6 here?
Yes, sorry. 2.4.28 specifically. > Regarding 2.4, Sam King wrote a patch for serial_throttle which rides > the infrastructure of port_helper. It was back in September 2004, and > I sat on it ever since because I thought that it was easier to hack > around individual instances of serial_throttle. If you cannot avoid > taking semaphores in serial_throttle's, then we may revive it. It is not I but usbserial that is taking the sempahore. Can you send me a copy of the patch? Ah. You mean this one? http://marc.theaimsgroup.com/?l=linux-usb-devel&m=109646810201898&w=2 ..Stu ------------------------------------------------------- This SF.Net email is sponsored by Yahoo. Introducing Yahoo! Search Developer Network - Create apps using Yahoo! Search APIs Find out how you can build Yahoo! directly into your own Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
