[PATCH 11/34] Bluetooth: Fix ACL MTU issue

Gustavo F. Padovan
2010-04-01T20:23:29Z

ERTM and Streaming Modes was having problems when the ACL MTU is lower
than MPS. The 'minus 10' is to take in account the header and fcs
lenghts.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
---
net/bluetooth/l2cap.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 428be03..12104f4 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -2297,6 +2297,8 @@ done:
rfc.retrans_timeout = 0;
rfc.monitor_timeout = 0;
rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
+ if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10)
+ rfc.max_pdu_size = pi->conn->mtu - 10;

l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
sizeof(rfc), (unsigned long) &rfc);
@@ -2318,6 +2320,8 @@ done:
rfc.retrans_timeout = 0;
rfc.monitor_timeout = 0;
rfc.max_pdu_size = cpu_to_le16(L2CAP_DEFAULT_MAX_PDU_SIZE);
+ if (L2CAP_DEFAULT_MAX_PDU_SIZE > pi->conn->mtu - 10)
+ rfc.max_pdu_size = pi->conn->mtu - 10;

l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
sizeof(rfc), (unsigned long) &rfc);
--
1.6.4.4