vfio: add quirk device write method
Add vfio quirk device mmio write method to avoid NULL pointer dereference issue. Reported-by: Lei Sun <slei.casper@gmail.com> Reviewed-by: Li Qiang <liq3ea@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org> Message-Id: <20200811114133.672647-4-ppandit@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -14,6 +14,7 @@
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#include CONFIG_DEVICES
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#include "exec/memop.h"
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#include "qemu/units.h"
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#include "qemu/log.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "qemu/module.h"
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@ -264,8 +265,15 @@ static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
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return data;
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}
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static void vfio_ati_3c3_quirk_write(void *opaque, hwaddr addr,
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uint64_t data, unsigned size)
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{
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qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid access\n", __func__);
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}
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static const MemoryRegionOps vfio_ati_3c3_quirk = {
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.read = vfio_ati_3c3_quirk_read,
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.write = vfio_ati_3c3_quirk_write,
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.endianness = DEVICE_LITTLE_ENDIAN,
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};
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