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Subject[PATCH net-next,1/2] hv_netvsc: Fix the return status in RX path
Date
From: Haiyang Zhang <haiyangz@microsoft.com>

As defined in hyperv_net.h, the NVSP_STAT_SUCCESS is one not zero.
Some functions returns 0 when it actually means NVSP_STAT_SUCCESS.
This patch fixes them.

In netvsc_receive(), it puts the last RNDIS packet's receive status
for all packets in a vmxferpage which may contain multiple RNDIS
packets.
This patch puts NVSP_STAT_FAIL in the receive completion if one of
the packets in a vmxferpage fails.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
---
drivers/net/hyperv/netvsc.c | 8 ++++++--
drivers/net/hyperv/netvsc_drv.c | 2 +-
drivers/net/hyperv/rndis_filter.c | 4 ++--
3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index aa95e81af6e5..1ddb2c39b6e4 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1098,12 +1098,16 @@ static int netvsc_receive(struct net_device *ndev,
void *data = recv_buf
+ vmxferpage_packet->ranges[i].byte_offset;
u32 buflen = vmxferpage_packet->ranges[i].byte_count;
+ int ret;

trace_rndis_recv(ndev, q_idx, data);

/* Pass it to the upper layer */
- status = rndis_filter_receive(ndev, net_device,
- channel, data, buflen);
+ ret = rndis_filter_receive(ndev, net_device,
+ channel, data, buflen);
+
+ if (unlikely(ret != NVSP_STAT_SUCCESS))
+ status = NVSP_STAT_FAIL;
}

enq_receive_complete(ndev, net_device, q_idx,
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index cdb78eefab67..33607995be62 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -818,7 +818,7 @@ int netvsc_recv_callback(struct net_device *net,
u64_stats_update_end(&rx_stats->syncp);

napi_gro_receive(&nvchan->napi, skb);
- return 0;
+ return NVSP_STAT_SUCCESS;
}

static void netvsc_get_drvinfo(struct net_device *net,
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c
index 2dc00f714482..591fb8080f11 100644
--- a/drivers/net/hyperv/rndis_filter.c
+++ b/drivers/net/hyperv/rndis_filter.c
@@ -443,10 +443,10 @@ int rndis_filter_receive(struct net_device *ndev,
"unhandled rndis message (type %u len %u)\n",
rndis_msg->ndis_msg_type,
rndis_msg->msg_len);
- break;
+ return NVSP_STAT_FAIL;
}

- return 0;
+ return NVSP_STAT_SUCCESS;
}

static int rndis_filter_query_device(struct rndis_device *dev,
--
2.15.1
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