P J P <ppan...@redhat.com> 于2020年6月25日周四 上午2:59写道：
>
> From: Prasad J Pandit <p...@fedoraproject.org>
>
> Add pcie-msi mmio read method to avoid NULL pointer dereference
> issue.
>
> Reported-by: Lei Sun <slei.cas...@gmail.com>
> Signed-off-by: Prasad J Pandit <p...@fedoraproject.org>
Reviewed-by: Li Qiang <liq...@gmail.com>
> ---
> hw/pci-host/designware.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/hw/pci-host/designware.c b/hw/pci-host/designware.c
> index 8492c18991..82262bdfdf 100644
> --- a/hw/pci-host/designware.c
> +++ b/hw/pci-host/designware.c
> @@ -21,6 +21,7 @@
> #include "qemu/osdep.h"
> #include "qapi/error.h"
> #include "qemu/module.h"
> +#include "qemu/log.h"
> #include "hw/pci/msi.h"
> #include "hw/pci/pci_bridge.h"
> #include "hw/pci/pci_host.h"
> @@ -63,6 +64,13 @@ designware_pcie_root_to_host(DesignwarePCIERoot *root)
> return DESIGNWARE_PCIE_HOST(bus->parent);
> }
>
> +static uint64_t designware_pcie_root_msi_read(void *opaque, hwaddr addr,
> + unsigned size)
> +{
> + qemu_log_mask(LOG_UNIMP, "%s not implemented\n", __func__);
> + return 0;
> +}
> +
> static void designware_pcie_root_msi_write(void *opaque, hwaddr addr,
> uint64_t val, unsigned len)
> {
> @@ -77,6 +85,7 @@ static void designware_pcie_root_msi_write(void *opaque,
> hwaddr addr,
> }
>
> static const MemoryRegionOps designware_pci_host_msi_ops = {
> + .read = designware_pcie_root_msi_read,
> .write = designware_pcie_root_msi_write,
> .endianness = DEVICE_LITTLE_ENDIAN,
> .valid = {
> --
> 2.26.2
>
