On Fri, Oct 02, 2009 at 10:47:55AM +0200, Johan Hovold wrote: > On Thu, Oct 01, 2009 at 07:52:21PM -0700, Eric W. Biederman wrote: > > Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> writes: > > > > >> As it stands today ftdi_sio does indeed call tty_flip_buffer_push from > > >> interrupt context with low_latency set and that is obviously incorrect, > > >> right? > > > > > > It seems to do it from a work queue - or did I miss a case ? > > > > ftdi_sio crash quite regularly for me with 2.6.31. > > > > With a bunch of nasties like: > > BUG: scheduling while atomic: swapper/0/0x00010000 > > bad: scheduling from the idle thread! > > It's the same problem. > > Greg, can't we apply the patch for stable at least? Then we can massage > ftdi_sio into actually using the work queue for doing _all_ processing > in the meantime if deemed necessary. Patches need to be in Linus's tree first, before they can get into the -stable releases. I'm still digging through my patch queue, sorry, been swamped with the -stable stuff, due to the merge window and 4 conferences over the past 2 weeks... thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
