From f9f462faa02777f497eb25255683a94e0c054de6 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Fri, 3 Jan 2014 03:02:35 -0800 Subject: [PATCH] Bluetooth: Add quirk for disabling Delete Stored Link Key command Some controller pretend they support the Delete Stored Link Key command, but in reality they really don't support it. < HCI Command: Delete Stored Link Key (0x03|0x0012) plen 7 bdaddr 00:00:00:00:00:00 all 1 > HCI Event: Command Complete (0x0e) plen 4 Delete Stored Link Key (0x03|0x0012) ncmd 1 status 0x11 deleted 0 Error: Unsupported Feature or Parameter Value Not correctly supporting this command causes the controller setup to fail and will make a device not work. However sending the command for controller that handle stored link keys is important. This quirk allows a driver to disable the command if it knows that this command handling is broken. Signed-off-by: Marcel Holtmann Signed-off-by: Johan Hedberg --- include/net/bluetooth/hci.h | 3 ++- net/bluetooth/hci_core.c | 7 ++++++- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 5dc3d907265..66c1cd87bfe 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -83,7 +83,8 @@ enum { HCI_QUIRK_RESET_ON_CLOSE, HCI_QUIRK_RAW_DEVICE, - HCI_QUIRK_FIXUP_BUFFER_SIZE + HCI_QUIRK_FIXUP_BUFFER_SIZE, + HCI_QUIRK_BROKEN_STORED_LINK_KEY, }; /* HCI device flags */ diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index b23d40385f1..5e8663c194c 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1304,8 +1304,13 @@ static void hci_init3_req(struct hci_request *req, unsigned long opt) * as supported send it. If not supported assume that the controller * does not have actual support for stored link keys which makes this * command redundant anyway. + * + * Some controllers indicate that they support handling deleting + * stored link keys, but they don't. The quirk lets a driver + * just disable this command. */ - if (hdev->commands[6] & 0x80) { + if (hdev->commands[6] & 0x80 && + !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) { struct hci_cp_delete_stored_link_key cp; bacpy(&cp.bdaddr, BDADDR_ANY); -- 2.46.0