netdev - [PATCH 09/64] Bluetooth: Fix ACL MTU issue

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Message-Id: <d1daa091e8612f3aab14d28b5836375fafe155e1.1273484096.git.marcel@holtmann.org>
Date:	Mon, 10 May 2010 11:36:59 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: [PATCH 09/64] Bluetooth: Fix ACL MTU issue

From: Gustavo F. Padovan <padovan@...fusion.mobi>

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@...fusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@...fusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
---
 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 401011a..99cf177 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -2267,6 +2267,8 @@ 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);
@@ -2288,6 +2290,8 @@ 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);
-- 
1.6.6.1

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