net: ipa: update channel in gsi_channel_trans_complete()

Have gsi_channel_trans_complete() update the known state from
hardware rather than doing so in gsi_channel_poll_one().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/gsi.c

@@ -1475,7 +1475,7 @@ void gsi_channel_doorbell(struct gsi_channel *channel)
 }
 
 /* Consult hardware, move any newly completed transactions to completed list */
-static struct gsi_trans *gsi_channel_update(struct gsi_channel *channel)
+struct gsi_trans *gsi_channel_update(struct gsi_channel *channel)
 {
 	u32 evt_ring_id = channel->evt_ring_id;
 	struct gsi *gsi = channel->gsi;
@@ -1529,9 +1529,6 @@ static struct gsi_trans *gsi_channel_poll_one(struct gsi_channel *channel)
 
 	/* Get the first transaction from the completed list */
 	trans = gsi_channel_trans_complete(channel);
-	if (!trans)	/* List is empty; see if there's more to do */
-		trans = gsi_channel_update(channel);
-
 	if (trans)
 		gsi_trans_move_polled(trans);
 

drivers/net/ipa/gsi_private.h

@@ -94,6 +94,14 @@ void gsi_channel_trans_exit(struct gsi_channel *channel);
  */
 void gsi_channel_doorbell(struct gsi_channel *channel);
 
+/* gsi_channel_update() - Update knowledge of channel hardware state
+ * @channel:	Channel whose doorbell should be rung
+ *
+ * Consult hardware, move any newly completed transactions to a
+ * channel's completed list
+ */
+struct gsi_trans *gsi_channel_update(struct gsi_channel *channel);
+
 /**
  * gsi_ring_virt() - Return virtual address for a ring entry
  * @ring:	Ring whose address is to be translated

drivers/net/ipa/gsi_trans.c

@@ -241,7 +241,7 @@ struct gsi_trans *gsi_channel_trans_complete(struct gsi_channel *channel)
 	u16 trans_id = trans_info->completed_id;
 
 	if (trans_id == trans_info->pending_id)
-		return NULL;
+		return gsi_channel_update(channel);
 
 	return &trans_info->trans[trans_id %= channel->tre_count];
 }