[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <35aaf24b19442db101a7fe7dbc9030a12203e3fa.1416319692.git.jslaby@suse.cz>
Date: Tue, 18 Nov 2014 15:06:19 +0100
From: Jiri Slaby <jslaby@...e.cz>
To: stable@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Marcel Holtmann <marcel@...tmann.org>,
Johan Hedberg <johan.hedberg@...el.com>,
Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 024/206] Bluetooth: Handle Intel USB bootloader with buggy interrupt
From: Marcel Holtmann <marcel@...tmann.org>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
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@...tmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@...el.com>
Signed-off-by: Jiri Slaby <jslaby@...e.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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists