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authorMarcel Holtmann <marcel@holtmann.org>2009-04-19 19:30:03 +0200
committerMarcel Holtmann <marcel@holtmann.org>2009-04-19 19:30:03 +0200
commit9499237a1c42a27fbcc7ed1d59e34df2b574cdfb (patch)
treed238fd5a6931af24d2efa6536eb17c09bbf5411b
parentBluetooth: Fallback from eSCO to SCO on unspecified error (diff)
downloadlinux-9499237a1c42a27fbcc7ed1d59e34df2b574cdfb.tar.xz
linux-9499237a1c42a27fbcc7ed1d59e34df2b574cdfb.zip
Bluetooth: Add workaround for wrong HCI event in eSCO setup
The Broadcom chips with 2.1 firmware handle the fallback case to a SCO link wrongly when setting up eSCO connections. < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17 handle 11 voice setting 0x0060 > HCI Event: Command Status (0x0f) plen 4 Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1 > HCI Event: Connect Complete (0x03) plen 11 status 0x00 handle 1 bdaddr 00:1E:3A:xx:xx:xx type SCO encrypt 0x01 The Link Manager negotiates the fallback to SCO, but then sends out a Connect Complete event. This is wrong and the Link Manager should actually send a Synchronous Connection Complete event if the Setup Synchronous Connection has been used. Only the remote side is allowed to use Connect Complete to indicate the missing support for eSCO in the host stack. This patch adds a workaround for this which clearly should not be needed, but reality is that broken Broadcom devices are deployed. Based on a report by Ville Tervo <ville.tervo@nokia.com> Signed-off-by: Marcel Holtman <marcel@holtmann.org>
-rw-r--r--net/bluetooth/hci_event.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 963f9662eaa8..15f40ea8d544 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -866,8 +866,16 @@ static inline void hci_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *s
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
- if (!conn)
- goto unlock;
+ if (!conn) {
+ if (ev->link_type != SCO_LINK)
+ goto unlock;
+
+ conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
+ if (!conn)
+ goto unlock;
+
+ conn->type = SCO_LINK;
+ }
if (!ev->status) {
conn->handle = __le16_to_cpu(ev->handle);