From b1484ef7400d0fbf7cc378efed11c9c732234751 Mon Sep 17 00:00:00 2001 From: Vasily Khoruzhick Date: Wed, 31 Oct 2018 19:40:18 -0700 Subject: [PATCH 190/323] Bluetooth: Add new quirk for broken local ext features max_page 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 --- include/net/bluetooth/hci.h | 7 +++++++ net/bluetooth/hci_event.c | 4 +++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index 243de74e1..7b2d516d5 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -239,6 +239,13 @@ enum { */ HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, + /* 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_FTR_MAX_PAGE, + /* * When this quirk is set, then the hci_suspend_notifier is not * registered. This is intended for devices which drop completely diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 9f52145bb..5aa09c745 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -700,7 +700,9 @@ static void hci_cc_read_local_ext_features(struct hci_dev *hdev, if (rp->status) return; - if (hdev->max_page < rp->max_page) + if (!test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FTR_MAX_PAGE, + &hdev->quirks) && + hdev->max_page < rp->max_page) hdev->max_page = rp->max_page; if (rp->page < HCI_MAX_PAGES) -- 2.34.0