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vfio-pci: Fix BAR->VFIODevice translation in

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DO_UPCAST is supposed to translate from the first member of a struct to
that struct, not from arbitrary ones. And it (usually) breaks the build
when neglecting this rule. Use container_of to fix the build breakage
and likely also the runtime behavior.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
aw: runtime behavior is actually the same, but clearly misuse of DO_UPCAST
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Jan Kiszka 2012-10-08 08:45:31 -06:00 committed by Alex Williamson
parent 1a40313381
commit 3a4f2816fa
1 changed files with 2 additions and 2 deletions
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4
hw/vfio_pci.c
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@ -721,7 +721,7 @@ static void vfio_bar_write(void *opaque, target_phys_addr_t addr,
* which access will service the interrupt, so we're potentially * which access will service the interrupt, so we're potentially
* getting quite a few host interrupts per guest interrupt. * getting quite a few host interrupts per guest interrupt.
*/ */
vfio_eoi(DO_UPCAST(VFIODevice, bars[bar->nr], bar)); vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr]));
} }
static uint64_t vfio_bar_read(void *opaque, static uint64_t vfio_bar_read(void *opaque,
@ -761,7 +761,7 @@ static uint64_t vfio_bar_read(void *opaque,
__func__, bar->nr, addr, size, data); __func__, bar->nr, addr, size, data);
/* Same as write above */ /* Same as write above */
vfio_eoi(DO_UPCAST(VFIODevice, bars[bar->nr], bar)); vfio_eoi(container_of(bar, VFIODevice, bars[bar->nr]));
return data; return data;
} }