netdev - [PATCH net-next] net: qualcomm: rmnet: Support recycling frames to real device

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Message-Id: <1509136208-14768-1-git-send-email-subashab@codeaurora.org>
Date:   Fri, 27 Oct 2017 14:30:08 -0600
From:   Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
To:     davem@...emloft.net, netdev@...r.kernel.org
Cc:     Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
Subject: [PATCH net-next] net: qualcomm: rmnet: Support recycling frames to real device

For deaggregation, the real device receives a large linear skb and
passes it on to rmnet. rmnet creates new skbs from this large frame.

If the real device supports recycling, it does not need to allocate
the large skbs during packet reception and can instead reuse them.

Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
---
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
index 29842cc..7869fcf 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
@@ -108,7 +108,10 @@ static void rmnet_set_skb_proto(struct sk_buff *skb)
 		while ((skbn = rmnet_map_deaggregate(skb)) != NULL)
 			__rmnet_map_ingress_handler(skbn, port);
 
-		consume_skb(skb);
+		if (skb->destructor)
+			skb->destructor(skb);
+		else
+			consume_skb(skb);
 	} else {
 		__rmnet_map_ingress_handler(skb, port);
 	}
-- 
1.9.1