From 8194f1ef5a815aea815a91daf2c721eab2674f1f Mon Sep 17 00:00:00 2001 From: Vasily Khoruzhick Date: Tue, 7 Mar 2023 23:17:30 +0100 Subject: Bluetooth: Add new quirk for broken local ext features page 2 Some adapters (e.g. RTL8723CS) advertise that they have more than 2 pages for local ext features, but they don't support any features declared in these pages. RTL8723CS reports max_page = 2 and declares support for sync train and secure connection, but it responds with either garbage or with error in status on corresponding commands. Signed-off-by: Vasily Khoruzhick Signed-off-by: Bastian Germann Signed-off-by: Luiz Augusto von Dentz --- include/net/bluetooth/hci.h | 7 +++++++ net/bluetooth/hci_event.c | 9 +++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 400f8a7d0c3f..997107bfc0b1 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -294,6 +294,13 @@ enum { * during the hdev->setup vendor callback. */ HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, + + /* When this quirk is set, max_page for local extended features + * is set to 1, even if controller reports higher number. Some + * controllers (e.g. RTL8723CS) report more pages, but they + * don't actually support features declared there. + */ + HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2, }; /* HCI device flags */ diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index e87c928c9e17..51f13518dba9 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -886,8 +886,13 @@ static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data, if (rp->status) return rp->status; - if (hdev->max_page < rp->max_page) - hdev->max_page = rp->max_page; + if (hdev->max_page < rp->max_page) { + if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2, + &hdev->quirks)) + bt_dev_warn(hdev, "broken local ext features page 2"); + else + hdev->max_page = rp->max_page; + } if (rp->page < HCI_MAX_PAGES) memcpy(hdev->features[rp->page], rp->features, 8); -- cgit