[PATCH 3/6] vfio: add quirk device write method

[P J P <ppandit@redhat.com>]

From: Prasad J Pandit <pjp@fedoraproject.org>

Add vfio quirk device mmio write method to avoid NULL pointer
dereference issue.

Reported-by: Lei Sun <slei.casper@gmail.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
---
 hw/vfio/pci-quirks.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index f2155ddb1d..5bd98885d5 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -13,6 +13,7 @@
 #include "qemu/osdep.h"
 #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"
@@ -263,8 +264,15 @@ 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_UNIMP, "%s not implemented\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,
 };
 
-- 
2.26.2