Don't need cached read index anymore now that packet iterator
is used. The iterator has the original read index until the
visible read_inde is updated.
Signed-off-by: Stephen Hemminger <sthem...@microsoft.com>
---
drivers/hv/ring_buffer.c | 17 ++++-------------
include/linux/hyperv.h | 14 --------------
2 files changed, 4 insertions(+), 27 deletions(-)
diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index a9021f13379f..b0f79526b86a 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -358,9 +358,6 @@ struct vmpacket_descriptor *hv_pkt_iter_first(struct
vmbus_channel *channel)
{
struct hv_ring_buffer_info *rbi = &channel->inbound;
- /* set state for later hv_pkt_iter_close */
- rbi->cached_read_index = rbi->ring_buffer->read_index;
-
if (hv_pkt_iter_avail(rbi) < sizeof(struct vmpacket_descriptor))
return NULL;
@@ -388,10 +385,7 @@ __hv_pkt_iter_next(struct vmbus_channel *channel,
rbi->priv_read_index -= dsize;
/* more data? */
- if (hv_pkt_iter_avail(rbi) < sizeof(struct vmpacket_descriptor))
- return NULL;
- else
- return hv_get_ring_buffer(rbi) + rbi->priv_read_index;
+ return hv_pkt_iter_first(channel);
}
EXPORT_SYMBOL_GPL(__hv_pkt_iter_next);
@@ -401,7 +395,7 @@ EXPORT_SYMBOL_GPL(__hv_pkt_iter_next);
void hv_pkt_iter_close(struct vmbus_channel *channel)
{
struct hv_ring_buffer_info *rbi = &channel->inbound;
- u32 cur_write_sz, cached_write_sz;
+ u32 orig_write_sz = hv_get_bytes_to_write(rbi);
u32 pending_sz;
/*
@@ -430,13 +424,10 @@ void hv_pkt_iter_close(struct vmbus_channel *channel)
if (pending_sz == 0)
return;
- cur_write_sz = hv_get_bytes_to_write(rbi);
-
- if (cur_write_sz < pending_sz)
+ if (hv_get_bytes_to_write(rbi) < pending_sz)
return;
- cached_write_sz = hv_get_cached_bytes_to_write(rbi);
- if (cached_write_sz < pending_sz)
+ if (orig_write_sz < pending_sz)
vmbus_setevent(channel);
}
EXPORT_SYMBOL_GPL(hv_pkt_iter_close);
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 4dd2ceb57b56..951db4ab89f3 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -125,7 +125,6 @@ struct hv_ring_buffer_info {
u32 ring_datasize; /* < ring_size */
u32 priv_read_index;
- u32 cached_read_index;
};
/*
@@ -178,19 +177,6 @@ static inline u32 hv_get_bytes_to_write(const struct
hv_ring_buffer_info *rbi)
return write;
}
-static inline u32 hv_get_cached_bytes_to_write(
- const struct hv_ring_buffer_info *rbi)
-{
- u32 read_loc, write_loc, dsize, write;
-
- dsize = rbi->ring_datasize;
- read_loc = rbi->cached_read_index;
- write_loc = rbi->ring_buffer->write_index;
-
- write = write_loc >= read_loc ? dsize - (write_loc - read_loc) :
- read_loc - write_loc;
- return write;
-}
/*
* VMBUS version is 32 bit entity broken up into
* two 16 bit quantities: major_number. minor_number.
--
2.11.0
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