Messages in this thread Patch in this message | | | From | Wolfgang Walter <> | Subject | patch: problem with sco | Date | Thu, 12 Jan 2006 01:38:31 +0100 |
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A friend and I encountered a problem with sco transfers to a headset using linux (vanilla 2.6.15). While all sco packets sent by the headset were received there was no outgoing traffic.
After switching debugging output on we found that actually sco_cnt was always zero in hci_sched_sco.
hciconfig hci0 shows sco_mtu to be 64:0. Changing that to 64:8 did not help.
This was because in hci_cc_info_param hdev->sco_pkts is set to zero. When we changed this line so that hdev->sco_pkts is set to 8 if bs->sco_max_pkt is 0 sco transfer to the headset started to work just fine.
Here the patch:
--- linux-2.6.15/net/bluetooth/hci_event.c 2006-01-03 04:21:10.000000000 +0100 +++ linux-2.6.15-dbg/net/bluetooth/hci_event.c 2006-01-12 00:35:48.000000000 +0100 @@ -322,7 +322,7 @@ hdev->acl_mtu = __le16_to_cpu(bs->acl_mtu); hdev->sco_mtu = bs->sco_mtu ? bs->sco_mtu : 64; 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); + hdev->sco_pkts = hdev->sco_cnt = (bs->sco_max_pkt ? __le16_to_cpu(bs->sco_max_pkt) : 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);
-- Wolfgang Walter Studentenwerk München Anstalt des öffentlichen Rechts Leiter EDV Leopoldstraße 15 80802 München Tel: +49 89 38196-276 Fax: +49 89 38196-144 wolfgang.walter@studentenwerk.mhn.de http://www.studentenwerk.mhn.de/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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