[patch] virtio: silence uninitialized variable warnings

[Dan Carpenter]

Most ->get() functions seem to call BUG_ON() if offset + len is out of
range, but rproc_virtio_get() returns early without initializing ret.
Presumably it can't actually happen but it leads to a static checker
warning.  Let's just initialize "ret".

Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 6e6cb0c9..597dbef 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -334,7 +334,7 @@ static inline void virtio_cread_bytes(struct virtio_device 
*vdev,
 
 static inline u8 virtio_cread8(struct virtio_device *vdev, unsigned int offset)
 {
-       u8 ret;
+       u8 ret = 0;
        vdev->config->get(vdev, offset, &ret, sizeof(ret));
        return ret;
 }
@@ -348,7 +348,7 @@ static inline void virtio_cwrite8(struct virtio_device 
*vdev,
 static inline u16 virtio_cread16(struct virtio_device *vdev,
                                 unsigned int offset)
 {
-       u16 ret;
+       u16 ret = 0;
        vdev->config->get(vdev, offset, &ret, sizeof(ret));
        return virtio16_to_cpu(vdev, (__force __virtio16)ret);
 }
@@ -363,7 +363,7 @@ static inline void virtio_cwrite16(struct virtio_device 
*vdev,
 static inline u32 virtio_cread32(struct virtio_device *vdev,
                                 unsigned int offset)
 {
-       u32 ret;
+       u32 ret = 0;
        vdev->config->get(vdev, offset, &ret, sizeof(ret));
        return virtio32_to_cpu(vdev, (__force __virtio32)ret);
 }
@@ -378,7 +378,7 @@ static inline void virtio_cwrite32(struct virtio_device 
*vdev,
 static inline u64 virtio_cread64(struct virtio_device *vdev,
                                 unsigned int offset)
 {
-       u64 ret;
+       u64 ret = 0;
        __virtio_cread_many(vdev, offset, &ret, 1, sizeof(ret));
        return virtio64_to_cpu(vdev, (__force __virtio64)ret);
 }
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