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Bluetooth: Add new quirk for broken local ext features page 2

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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 <anarsoul@gmail.com>
Signed-off-by: Bastian Germann <bage@debian.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Vasily Khoruzhick 2023-03-07 23:17:30 +01:00 committed by Luiz Augusto von Dentz
parent a88ea43b73
commit 8194f1ef5a
2 changed files with 14 additions and 2 deletions
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7
include/net/bluetooth/hci.h
View File

@ -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 */

9
net/bluetooth/hci_event.c
View File

@ -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);