[PATCH AUTOSEL 6.12 47/47] Bluetooth: Add quirk for broken READ_PAGE_SCAN_TYPE

[Sasha Levin <sashal@kernel.org>]

From: Pedro Nishiyama <nishiyama.pedro@gmail.com>

[ Upstream commit 127881334eaad639e0a19a399ee8c91d6c9dc982 ]

Some fake controllers cannot be initialized because they return a smaller
report than expected for READ_PAGE_SCAN_TYPE.

Signed-off-by: Pedro Nishiyama <nishiyama.pedro@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 include/net/bluetooth/hci.h | 8 ++++++++
 net/bluetooth/hci_sync.c    | 3 ++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index dc8a3e4002e87..eb978a33a9d1d 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -361,6 +361,14 @@ enum {
 	 * This quirk must be set before hci_register_dev is called.
 	 */
 	HCI_QUIRK_BROKEN_READ_VOICE_SETTING,
+
+	/* When this quirk is set, the HCI_OP_READ_PAGE_SCAN_TYPE command is
+	 * skipped. This is required for a subset of the CSR controller clones
+	 * which erroneously claim to support it.
+	 *
+	 * This quirk must be set before hci_register_dev is called.
+	 */
+	HCI_QUIRK_BROKEN_READ_PAGE_SCAN_TYPE,
 };
 
 /* HCI device flags */
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index bb455e96a715a..cb4d47ae129e8 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -4156,7 +4156,8 @@ static int hci_read_page_scan_type_sync(struct hci_dev *hdev)
 	 * support the Read Page Scan Type command. Check support for
 	 * this command in the bit mask of supported commands.
 	 */
-	if (!(hdev->commands[13] & 0x01))
+	if (!(hdev->commands[13] & 0x01) ||
+	    test_bit(HCI_QUIRK_BROKEN_READ_PAGE_SCAN_TYPE, &hdev->quirks))
 		return 0;
 
 	return __hci_cmd_sync_status(hdev, HCI_OP_READ_PAGE_SCAN_TYPE,
-- 
2.39.5