Commit a5c3021b authored by Luiz Augusto von Dentz's avatar Luiz Augusto von Dentz Committed by Marcel Holtmann
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Bluetooth: L2CAP: Detect if remote is not able to use the whole MPS 



If the remote is not able to fully utilize the MPS choosen recalculate
the credits based on the actual amount it is sending that way it can
still send packets of MTU size without credits dropping to 0.

Signed-off-by: default avatarLuiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 96cd8eaa

net/bluetooth/l2cap_core.c

+10 −0
Original line number Diff line number Diff line
@@ -6787,6 +6787,16 @@ static int l2cap_le_data_rcv(struct l2cap_chan *chan, struct sk_buff *skb) 
		chan->sdu_len = sdu_len;

		chan->sdu_last_frag = skb;



		/* Detect if remote is not able to use the selected MPS */

		if (skb->len + L2CAP_SDULEN_SIZE < chan->mps) {

			u16 mps_len = skb->len + L2CAP_SDULEN_SIZE;



			/* Adjust the number of credits */

			BT_DBG("chan->mps %u -> %u", chan->mps, mps_len);

			chan->mps = mps_len;

			l2cap_chan_le_send_credits(chan);

		}



		return 0;

	}