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Open Source and information security mailing list archives
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Date: Sat, 29 Oct 2022 22:24:53 +0200 From: Ismael Ferreras Morezuelas <swyterzone@...il.com> To: marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com, davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, luiz.von.dentz@...el.com, quic_zijuhu@...cinc.com, hdegoede@...hat.com, swyterzone@...il.com Cc: linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH 2/3] Bluetooth: btusb: Add a setup message for CSR dongles showing the Read Local Information values The rationale of showing this is that it's potentially critical information to diagnose and find more CSR compatibility bugs in the future and it will save a lot of headaches. We can't ask normal people to run btmon, but infinitely more users already post their dmesg. Because in many cases the device doesn't go up, most of the tools won't show these either. Given that clones come from a wide array of vendors (some are actually Barrot, some are something else) and these numbers are what let us find differences between actual and fake ones, it will be immensely helpful to scour the Internet looking for this pattern and building an actual database to find correlations and improve the checks. I can't buy a sack of clones and do it myself. Cc: stable@...r.kernel.org Cc: Hans de Goede <hdegoede@...hat.com> Signed-off-by: Ismael Ferreras Morezuelas <swyterzone@...il.com> --- drivers/bluetooth/btusb.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 1360b2163ec5..8f34bf195bae 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2112,6 +2112,11 @@ static int btusb_setup_csr(struct hci_dev *hdev) rp = (struct hci_rp_read_local_version *)skb->data; + bt_dev_info(hdev, "CSR: Setting up dongle with HCI ver=%u rev=%04x; LMP ver=%u subver=%04x; manufacturer=%u", + le16_to_cpu(rp->hci_ver), le16_to_cpu(rp->hci_rev), + le16_to_cpu(rp->lmp_ver), le16_to_cpu(rp->lmp_subver), + le16_to_cpu(rp->manufacturer)); + /* Detect a wide host of Chinese controllers that aren't CSR. * * Known fake bcdDevices: 0x0100, 0x0134, 0x1915, 0x2520, 0x7558, 0x8891 -- 2.38.1
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