[PATCH v3 03/24] sd/pxa2xx_mmci: Fix to realize "pxa2xx-mmci" device

[Markus Armbruster]

pxa2xx_mmci_init() creates a "pxa2xx-mmci" device, but neglects to
realize it.  Affects machines akita, borzoi, connex, mainstone, spitz,
terrier, tosa, verdex, and z2.

In theory, a device becomes real only on realize.  In practice, the
transition from unreal to real is a fuzzy one.  The work to make a
device real can be spread between realize methods (fine),
instance_init methods (wrong), and board code wiring up the device
(fine as long as it effectively happens on realize).  Depending on
what exactly is done where, a device can work even when we neglect
to realize it.

This one appears to work.  Nevertheless, it's a clear misuse of the
interface.  Even when it works today (more or less by chance), it can
break tomorrow.

Fix by realizing it right away.  Visible in "info qom-tree"; here's
the change for akita:

     /machine (akita-machine)
       [...]
       /unattached (container)
         [...]
    +    /device[5] (pxa2xx-mmci)
    +      /pxa2xx-mmci[0] (qemu:memory-region)
    +      /sd-bus (pxa2xx-mmci-bus)
         [rest of device[*] renumbered...]

Fixes: 7a9468c92517e19037bfe2272f64f5dadaf9db15
Cc: Andrzej Zaborowski <balrogg@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-arm@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/sd/pxa2xx_mmci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/sd/pxa2xx_mmci.c b/hw/sd/pxa2xx_mmci.c
index f9c50ddda5..c32df1b8f9 100644
--- a/hw/sd/pxa2xx_mmci.c
+++ b/hw/sd/pxa2xx_mmci.c
@@ -492,6 +492,7 @@ PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem,
     sysbus_connect_irq(sbd, 0, irq);
     qdev_connect_gpio_out_named(dev, "rx-dma", 0, rx_dma);
     qdev_connect_gpio_out_named(dev, "tx-dma", 0, tx_dma);
+    qdev_init_nofail(dev);
 
     /* Create and plug in the sd card */
     carddev = qdev_create(qdev_get_child_bus(dev, "sd-bus"), TYPE_SD_CARD);
-- 
2.26.2