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Bluetooth: l2cap: Fix initial credit calculaton for MTU < MPS

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When required Rx MTU is less than configured Rx MPS, the
resultant initial credits was 0 which prevented any L2CAP
packet to be received.

Fixed by ceiling the initial credits count in the credits
calculation.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2017-05-14 06:21:09 +02:00 • committed by Johan Hedberg
commit 14365080d2
1 changed files with 2 additions and 1 deletions
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3
subsys/bluetooth/host/l2cap.c
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@ -641,7 +641,8 @@ static void l2cap_chan_rx_init(struct bt_l2cap_le_chan *chan)
if (!chan->rx.init_credits) {
if (chan->chan.ops->alloc_buf) {
/* Auto tune credits to receive a full packet */
chan->rx.init_credits = chan->rx.mtu /
chan->rx.init_credits = (chan->rx.mtu +
(L2CAP_MAX_LE_MPS - 1)) /
L2CAP_MAX_LE_MPS;
} else {
chan->rx.init_credits = L2CAP_LE_MAX_CREDITS;