[Qemu-devel] [PATCH v2 2/6] pvrdma: add uar_read routine

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

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

Define skeleton 'uar_read' routine. Avoid NULL dereference.

Reported-by: Li Qiang <liq3ea@163.com>
Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
---
 hw/rdma/vmw/pvrdma_main.c | 6 ++++++
 1 file changed, 6 insertions(+)

Update: change return value from uar_read()
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02787.html

diff --git a/hw/rdma/vmw/pvrdma_main.c b/hw/rdma/vmw/pvrdma_main.c
index 23dc9926e3..997d7f395a 100644
--- a/hw/rdma/vmw/pvrdma_main.c
+++ b/hw/rdma/vmw/pvrdma_main.c
@@ -448,6 +448,11 @@ static const MemoryRegionOps regs_ops = {
     },
 };
 
+static uint64_t uar_read(void *opaque, hwaddr addr, unsigned size)
+{
+    return 0xffffffff;
+}
+
 static void uar_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
 {
     PVRDMADev *dev = opaque;
@@ -489,6 +494,7 @@ static void uar_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
 }
 
 static const MemoryRegionOps uar_ops = {
+    .read = uar_read,
     .write = uar_write,
     .endianness = DEVICE_LITTLE_ENDIAN,
     .impl = {
-- 
2.19.2