[PATCH] Fix SCO on Broadcom Bluetooth adapters

[Olivier Galibert <galibert@pobox.com>]

Broadcom USB Bluetooth adapters report a maximum of zero SCO packets
in-flight, killing SCO.  Use a reasonable count instead in that case.

Signed-off-by: Olivier Galibert <galibert@pobox.com>

---

I don't think that could be reasonably done as a quirk.  Simple
examination of the .inf coming with the windows driver shows that 100+
different models may be having this problem.  Also, it can't break
already working adapters, so why bother.

 net/bluetooth/hci_event.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -324,6 +324,13 @@ static void hci_cc_info_param(struct hci
 		hdev->acl_pkts = hdev->acl_cnt = __le16_to_cpu(bs->acl_max_pkt);
 		hdev->sco_pkts = hdev->sco_cnt = __le16_to_cpu(bs->sco_max_pkt);
 
+		/* Some buggy USB bluetooth adapters, Broadcom in
+		   particular, answer zero as the max number of sco
+		   packets in flight.  Use a reasonable value
+		   instead */
+		if (hdev->sco_pkts == 0)
+			hdev->sco_pkts = hdev->sco_cnt = 8
+
 		BT_DBG("%s mtu: acl %d, sco %d max_pkt: acl %d, sco %d", hdev->name,
 			hdev->acl_mtu, hdev->sco_mtu, hdev->acl_pkts, hdev->sco_pkts);
 		break;