On 08/09/2011 03:42 PM, Michael S. Tsirkin wrote:
On Tue, Aug 09, 2011 at 09:52:17AM +0300, Avi Kivity wrote: > On 08/09/2011 09:55 AM, Bob Breuer wrote: > >> static void lance_cleanup(VLANClientState *nc) > >> @@ -117,13 +116,11 @@ static int lance_init(SysBusDevice *dev) > >> SysBusPCNetState *d = FROM_SYSBUS(SysBusPCNetState, dev); > >> PCNetState *s =&d->state; > >> > >> - s->mmio_index = > >> - cpu_register_io_memory(lance_mem_read, lance_mem_write, d, > >> - DEVICE_NATIVE_ENDIAN); > >> + memory_region_init_io(&s->mmio,&lance_mem_ops, s, "lance-mmio", 4); > > > >You've switched up d and s here, so anything that tries to talk to the > >ethernet, such as a sparc32 guest, will now cause Qemu to segfault. > > > > > > Good catch; will post a fix. > > Maybe keeping the opaque wasn't such a good idea. Yes, we typically can get from the mmio to the device state using container_of.
But in some cases, we can't, and the it's a pain having to wrap MemoryRegion in another structure containing an opaque.
Maybe a good compromise is to: - keep MemoryRegion::opaque - pass a MemoryRegion *mr to callbacks instead of opaque - use container_of() when possible - use mr->opaque otherwise -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
