On Thursday 24 January 2008 11:54, Stefan Richter wrote: > fw_device.node_id and fw_device.generation are accessed without mutexes. > We have to ensure that all readers will get to see node_id updates > before generation updates. > > An earlier incarnation of this patch fixes an inability to recognize > devices after "giving up on config rom", > https://bugzilla.redhat.com/show_bug.cgi?id=429950 > > Signed-off-by: Stefan Richter <[EMAIL PROTECTED]> > --- > > Rework of patches > firewire: fw-core: enforce write order when updating > fw_device.generation and parts of > firewire: fw-core: react on bus resets while the config ROM is being > fetched firewire: fw-sbp2: enforce read order of device generation and node > ID from November 1 2007. > > Update: > - write site and read sites folded into one patch > - added fix to fw_device_enable_phys_dma() and fill_bus_reset_event() > - smp_ barriers are sufficient > - comments, changelog
I don't know the firewire subsystem at all, but the barriers seem right (in that they match your description of the problem), and comments for them are really good. Thanks, Nick -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
