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Subject[PATCH net-next 4/5] net: ipa: call gsi_evt_ring_rx_update() unconditionally
Date
When an RX transaction completes, we update the trans->len field to
contain the actual number of bytes received. This is done in a loop
in gsi_evt_ring_rx_update().

Change that function so it checks the data transfer direction
recorded in the transaction, and only updates trans->len for RX
transfers.

Then call it unconditionally. This means events for TX endpoints
will run through the loop without otherwise doing anything, but
this will change shortly.

Signed-off-by: Alex Elder <elder@linaro.org>
---
drivers/net/ipa/gsi.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c
index 2c531ba1af2eb..d08f3e73d51fc 100644
--- a/drivers/net/ipa/gsi.c
+++ b/drivers/net/ipa/gsi.c
@@ -1392,7 +1392,8 @@ static void gsi_evt_ring_rx_update(struct gsi *gsi, u32 evt_ring_id, u32 index)
if (!trans)
return;

- trans->len = __le16_to_cpu(event->len);
+ if (trans->direction == DMA_FROM_DEVICE)
+ trans->len = __le16_to_cpu(event->len);

/* Move on to the next event and transaction */
if (--event_avail)
@@ -1500,8 +1501,7 @@ static struct gsi_trans *gsi_channel_update(struct gsi_channel *channel)
*/
if (channel->toward_ipa)
gsi_trans_tx_completed(trans);
- else
- gsi_evt_ring_rx_update(gsi, evt_ring_id, index);
+ gsi_evt_ring_rx_update(gsi, evt_ring_id, index);

gsi_trans_move_complete(trans);

--
2.34.1
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