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hw/ide: Fix crash when plugging a piix3-ide device into the x-remote machine

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QEMU currently crashes when the user tries to do something like:

 qemu-system-x86_64 -M x-remote -device piix3-ide

This happens because the "isabus" variable is not initialized with
the x-remote machine yet. Add a proper check for this condition
and propagate the error to the caller, so we can fail there gracefully.

Message-Id: <20210416125256.2039734-1-thuth@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2021-04-16 14:52:56 +02:00
parent 283f0a05e2
commit 9405d87be2
5 changed files with 46 additions and 21 deletions
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14
hw/isa/isa-bus.c
View file

@ -131,13 +131,17 @@ void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
isa_init_ioport(dev, start);
}
void isa_register_portio_list(ISADevice *dev,
PortioList *piolist, uint16_t start,
const MemoryRegionPortio *pio_start,
void *opaque, const char *name)
int isa_register_portio_list(ISADevice *dev,
PortioList *piolist, uint16_t start,
const MemoryRegionPortio *pio_start,
void *opaque, const char *name)
{
assert(piolist && !piolist->owner);
if (!isabus) {
return -ENODEV;
}
/* START is how we should treat DEV, regardless of the actual
contents of the portio array. This is how the old code
actually handled e.g. the FDC device. */
@ -145,6 +149,8 @@ void isa_register_portio_list(ISADevice *dev,
portio_list_init(piolist, OBJECT(dev), pio_start, opaque, name);
portio_list_add(piolist, isabus->address_space_io, start);
return 0;
}
static void isa_device_init(Object *obj)