| From | Jiri Slaby <> | Subject | [PATCH 3.12 024/206] Bluetooth: Handle Intel USB bootloader with buggy interrupt | Date | Tue, 18 Nov 2014 15:06:19 +0100 |
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From: Marcel Holtmann <marcel@holtmann.org>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit 3a5ef20c979c0f33b6fb2582d04957397a6bf51f upstream.
The interrupt interface for the Intel USB bootloader devices is only enabled after receiving SetInterface(0, AltSetting=0). When this USB command is not send, then no HCI events will be received.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> --- drivers/bluetooth/btusb.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 4e86b93b90f0..27dd68362639 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -1495,6 +1495,18 @@ static int btusb_probe(struct usb_interface *intf, data->isoc = NULL; } + if (id->driver_info & BTUSB_INTEL_BOOT) { + /* A bug in the bootloader causes that interrupt interface is + * only enabled after receiving SetInterface(0, AltSetting=0). + */ + err = usb_set_interface(data->udev, 0, 0); + if (err < 0) { + BT_ERR("failed to set interface 0, alt 0 %d", err); + hci_free_dev(hdev); + return err; + } + } + if (data->isoc) { err = usb_driver_claim_interface(&btusb_driver, data->isoc, data); -- 2.1.3
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