[PATCH 04/24] aspeed: Don't create unwanted "ftgmac100", "aspeed-mmi" devices

[Markus Armbruster <armbru@redhat.com>]

These devices are optional, and controlled by @nb_nics.
aspeed_soc_ast2600_init() and aspeed_soc_init() create the maximum
supported number.  aspeed_soc_ast2600_realize() and
aspeed_soc_realize() realize only the wanted number.  Works, although
it can leave unrealized devices hanging around in the QOM composition
tree.  Affects machines ast2500-evb, ast2600-evb, palmetto-bmc,
romulus-bmc, swift-bmc, tacoma-bmc, and witherspoon-bmc.

Make the init functions create only the wanted ones.  Visible in "info
qom-tree"; here's the change for ast2600-evb:

     /machine (ast2600-evb-machine)
       [...]
       /soc (ast2600-a1)
         [...]
         /ftgmac100[0] (ftgmac100)
           /ftgmac100[0] (qemu:memory-region)
    -    /ftgmac100[1] (ftgmac100)
    -    /ftgmac100[2] (ftgmac100)
    -    /ftgmac100[3] (ftgmac100)
         /gpio (aspeed.gpio-ast2600)
         [...]
         /mii[0] (aspeed-mmi)
           /aspeed-mmi[0] (qemu:memory-region)
    -    /mii[1] (aspeed-mmi)
    -    /mii[2] (aspeed-mmi)
    -    /mii[3] (aspeed-mmi)
         /rtc (aspeed.rtc)

I'm not sure creating @nb_nics devices makes sense.  How many does the
physical chip provide?

Cc: "Cédric Le Goater" <clg@kaod.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Andrew Jeffery <andrew@aj.id.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: qemu-arm@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/arm/aspeed_ast2600.c | 2 +-
 hw/arm/aspeed_soc.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index 71a0acfe26..0a6a77dd54 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -188,7 +188,7 @@ static void aspeed_soc_ast2600_init(Object *obj)
                               sizeof(s->wdt[i]), typename);
     }
 
-    for (i = 0; i < sc->macs_num; i++) {
+    for (i = 0; i < nb_nics && i < sc->macs_num; i++) {
         sysbus_init_child_obj(obj, "ftgmac100[*]", OBJECT(&s->ftgmac100[i]),
                               sizeof(s->ftgmac100[i]), TYPE_FTGMAC100);
 
diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index cf6b6dd116..7ca860392a 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -203,7 +203,7 @@ static void aspeed_soc_init(Object *obj)
                               sizeof(s->wdt[i]), typename);
     }
 
-    for (i = 0; i < sc->macs_num; i++) {
+    for (i = 0; i < nb_nics && i < sc->macs_num; i++) {
         sysbus_init_child_obj(obj, "ftgmac100[*]", OBJECT(&s->ftgmac100[i]),
                               sizeof(s->ftgmac100[i]), TYPE_FTGMAC100);
     }
-- 
2.21.1