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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>
This commit is contained in:
Prasad J Pandit 2020-08-11 17:11:27 +05:30 committed by Paolo Bonzini
parent 4f2a5202a0
commit 24202d2b56
1 changed files with 8 additions and 0 deletions
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8
hw/vfio/pci-quirks.c
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@ -14,6 +14,7 @@
#include CONFIG_DEVICES
#include "exec/memop.h"
#include "qemu/units.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
@ -264,8 +265,15 @@ static uint64_t vfio_ati_3c3_quirk_read(void *opaque,
return data;
}
static void vfio_ati_3c3_quirk_write(void *opaque, hwaddr addr,
uint64_t data, unsigned size)
{
qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid access\n", __func__);
}
static const MemoryRegionOps vfio_ati_3c3_quirk = {
.read = vfio_ati_3c3_quirk_read,
.write = vfio_ati_3c3_quirk_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};