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Subject[PATCH v3] virtio_pmem: fix sparse warning
Date
This patch fixes below sparse warning related to __virtio
type in virtio pmem driver. This is reported by Intel test
bot on linux-next tree.

nd_virtio.c:56:28: warning: incorrect type in assignment
(different base types)
nd_virtio.c:56:28: expected unsigned int [unsigned] [usertype] type
nd_virtio.c:56:28: got restricted __virtio32
nd_virtio.c:93:59: warning: incorrect type in argument 2
(different base types)
nd_virtio.c:93:59: expected restricted __virtio32 [usertype] val
nd_virtio.c:93:59: got unsigned int [unsigned] [usertype] ret

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
---
This fixes a warning, so submitting it as a separate
patch on top of virtio pmem series.

v2-> v3
Use __le for req/resp fields - Michael

drivers/nvdimm/nd_virtio.c | 4 ++--
include/uapi/linux/virtio_pmem.h | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/nvdimm/nd_virtio.c b/drivers/nvdimm/nd_virtio.c
index 8645275c08c2..10351d5b49fa 100644
--- a/drivers/nvdimm/nd_virtio.c
+++ b/drivers/nvdimm/nd_virtio.c
@@ -53,7 +53,7 @@ static int virtio_pmem_flush(struct nd_region *nd_region)
init_waitqueue_head(&req_data->host_acked);
init_waitqueue_head(&req_data->wq_buf);
INIT_LIST_HEAD(&req_data->list);
- req_data->req.type = cpu_to_virtio32(vdev, VIRTIO_PMEM_REQ_TYPE_FLUSH);
+ req_data->req.type = cpu_to_le32(VIRTIO_PMEM_REQ_TYPE_FLUSH);
sg_init_one(&sg, &req_data->req, sizeof(req_data->req));
sgs[0] = &sg;
sg_init_one(&ret, &req_data->resp.ret, sizeof(req_data->resp));
@@ -90,7 +90,7 @@ static int virtio_pmem_flush(struct nd_region *nd_region)
} else {
/* A host repsonse results in "host_ack" getting called */
wait_event(req_data->host_acked, req_data->done);
- err = virtio32_to_cpu(vdev, req_data->resp.ret);
+ err = le32_to_cpu(req_data->resp.ret);
}

kfree(req_data);
diff --git a/include/uapi/linux/virtio_pmem.h b/include/uapi/linux/virtio_pmem.h
index efcd72f2d20d..9a63ed6d062f 100644
--- a/include/uapi/linux/virtio_pmem.h
+++ b/include/uapi/linux/virtio_pmem.h
@@ -23,12 +23,12 @@ struct virtio_pmem_config {

struct virtio_pmem_resp {
/* Host return status corresponding to flush request */
- __u32 ret;
+ __le32 ret;
};

struct virtio_pmem_req {
/* command type */
- __u32 type;
+ __le32 type;
};

#endif
--
2.14.5
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