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path: root/drivers/hv/channel.c
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Diffstat (limited to 'drivers/hv/channel.c')
-rw-r--r--drivers/hv/channel.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 603ce97e9..c4dcab048 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -601,6 +601,7 @@ int vmbus_sendpacket_ctl(struct vmbus_channel *channel, void *buffer,
u64 aligned_data = 0;
int ret;
bool signal = false;
+ int num_vecs = ((bufferlen != 0) ? 3 : 1);
/* Setup the descriptor */
@@ -618,7 +619,8 @@ int vmbus_sendpacket_ctl(struct vmbus_channel *channel, void *buffer,
bufferlist[2].iov_base = &aligned_data;
bufferlist[2].iov_len = (packetlen_aligned - packetlen);
- ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal);
+ ret = hv_ringbuffer_write(&channel->outbound, bufferlist, num_vecs,
+ &signal);
/*
* Signalling the host is conditional on many factors: