From: K. Y. Srinivasan <k...@microsoft.com>
After the channel is rescinded, the host does not read from the rescinded
channel.
Fail writes to a channel that has already been rescinded
Signed-off-by: K. Y. Srinivasan <k...@microsoft.com>
---
drivers/hv/ring_buffer.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index cd49cb1..72f649d 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -298,6 +298,9 @@ int hv_ringbuffer_write(struct vmbus_channel *channel,
unsigned long flags = 0;
struct hv_ring_buffer_info *outring_info = &channel->outbound;
+ if (channel->rescind)
+ return -ENODEV;
+
for (i = 0; i < kv_count; i++)
totalbytes_towrite += kv_list[i].iov_len;
--
1.7.4.1
