[PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[Johan Hovold]

A recent commit restored the original (and still documented) semantics
for the HCI_QUIRK_USE_BDADDR_PROPERTY quirk so that the device address
is considered invalid unless an address is provided by firmware.

This specifically means that this flag must only be set for devices with
invalid addresses, but the Broadcom BCM4377 driver has so far been
setting this flag unconditionally.

Fortunately the driver already checks for invalid addresses during setup
and sets the HCI_QUIRK_INVALID_BDADDR flag, which can simply be replaced
with HCI_QUIRK_USE_BDADDR_PROPERTY to indicate that the default address
is invalid but can be overridden by firmware (long term, this should
probably just always be allowed).

Fixes: 6945795bc81a ("Bluetooth: fix use-bdaddr-property quirk")
Cc: stable@vger.kernel.org      # 6.5
Reported-by: Felix Zhang <mrman@mrman314.tech>
Link: https://lore.kernel.org/r/77419ffacc5b4875e920e038332575a2a5bff29f.camel@mrman314.tech/
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/bluetooth/hci_bcm4377.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/bluetooth/hci_bcm4377.c b/drivers/bluetooth/hci_bcm4377.c
index a61757835695..9a7243d5db71 100644
--- a/drivers/bluetooth/hci_bcm4377.c
+++ b/drivers/bluetooth/hci_bcm4377.c
@@ -1417,7 +1417,7 @@ static int bcm4377_check_bdaddr(struct bcm4377_data *bcm4377)
 
 	bda = (struct hci_rp_read_bd_addr *)skb->data;
 	if (!bcm4377_is_valid_bdaddr(bcm4377, &bda->bdaddr))
-		set_bit(HCI_QUIRK_INVALID_BDADDR, &bcm4377->hdev->quirks);
+		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &bcm4377->hdev->quirks);
 
 	kfree_skb(skb);
 	return 0;
@@ -2368,7 +2368,6 @@ static int bcm4377_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	hdev->set_bdaddr = bcm4377_hci_set_bdaddr;
 	hdev->setup = bcm4377_hci_setup;
 
-	set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
 	if (bcm4377->hw->broken_mws_transport_config)
 		set_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &hdev->quirks);
 	if (bcm4377->hw->broken_ext_scan)
-- 
2.41.0


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Re: [PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[Felix Zhang]

On Wed, 2023-12-27 at 11:10 +0100, Johan Hovold wrote:
> A recent commit restored the original (and still documented)
> semantics
> for the HCI_QUIRK_USE_BDADDR_PROPERTY quirk so that the device
> address
> is considered invalid unless an address is provided by firmware.
> 
> This specifically means that this flag must only be set for devices
> with
> invalid addresses, but the Broadcom BCM4377 driver has so far been
> setting this flag unconditionally.
> 
> Fortunately the driver already checks for invalid addresses during
> setup
> and sets the HCI_QUIRK_INVALID_BDADDR flag, which can simply be
> replaced
> with HCI_QUIRK_USE_BDADDR_PROPERTY to indicate that the default
> address
> is invalid but can be overridden by firmware (long term, this should
> probably just always be allowed).
> 
> Fixes: 6945795bc81a ("Bluetooth: fix use-bdaddr-property quirk")
> Cc: stable@vger.kernel.org      # 6.5
> Reported-by: Felix Zhang <mrman@mrman314.tech>
> Link:
> https://lore.kernel.org/r/77419ffacc5b4875e920e038332575a2a5bff29f.camel@mrman314.tech/
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
> ---
>  drivers/bluetooth/hci_bcm4377.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/bluetooth/hci_bcm4377.c
> b/drivers/bluetooth/hci_bcm4377.c
> index a61757835695..9a7243d5db71 100644
> --- a/drivers/bluetooth/hci_bcm4377.c
> +++ b/drivers/bluetooth/hci_bcm4377.c
> @@ -1417,7 +1417,7 @@ static int bcm4377_check_bdaddr(struct
> bcm4377_data *bcm4377)
>  
>  	bda = (struct hci_rp_read_bd_addr *)skb->data;
>  	if (!bcm4377_is_valid_bdaddr(bcm4377, &bda->bdaddr))
> -		set_bit(HCI_QUIRK_INVALID_BDADDR, &bcm4377->hdev-
> >quirks);
> +		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &bcm4377-
> >hdev->quirks);
>  
>  	kfree_skb(skb);
>  	return 0;
> @@ -2368,7 +2368,6 @@ static int bcm4377_probe(struct pci_dev *pdev,
> const struct pci_device_id *id)
>  	hdev->set_bdaddr = bcm4377_hci_set_bdaddr;
>  	hdev->setup = bcm4377_hci_setup;
>  
> -	set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
>  	if (bcm4377->hw->broken_mws_transport_config)
>  		set_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG,
> &hdev->quirks);
>  	if (bcm4377->hw->broken_ext_scan)
Hi,

Thanks for the patch!  I have just tested the patch on my MacBookAir9,1
with some modifications to make it patch with the master branch of the
Linux kernel, and it works great!  The device is recognized by the
system; and I can scan, pair, connect, and play audio just fine.  If
you want me to send over the modified patch that I have used, please
let me know.

Thanks!

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Re: [PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[Johan Hovold]

On Wed, Dec 27, 2023 at 01:19:39PM -0500, Felix Zhang wrote:
> On Wed, 2023-12-27 at 11:10 +0100, Johan Hovold wrote:
> > A recent commit restored the original (and still documented)
> > semantics
> > for the HCI_QUIRK_USE_BDADDR_PROPERTY quirk so that the device
> > address
> > is considered invalid unless an address is provided by firmware.
> > 
> > This specifically means that this flag must only be set for devices
> > with
> > invalid addresses, but the Broadcom BCM4377 driver has so far been
> > setting this flag unconditionally.
> > 
> > Fortunately the driver already checks for invalid addresses during
> > setup
> > and sets the HCI_QUIRK_INVALID_BDADDR flag, which can simply be
> > replaced
> > with HCI_QUIRK_USE_BDADDR_PROPERTY to indicate that the default
> > address
> > is invalid but can be overridden by firmware (long term, this should
> > probably just always be allowed).
> > 
> > Fixes: 6945795bc81a ("Bluetooth: fix use-bdaddr-property quirk")
> > Cc: stable@vger.kernel.org      # 6.5
> > Reported-by: Felix Zhang <mrman@mrman314.tech>
> > Link:
> > https://lore.kernel.org/r/77419ffacc5b4875e920e038332575a2a5bff29f.camel@mrman314.tech/
> > Signed-off-by: Johan Hovold <johan+linaro@kernel.org>

> Thanks for the patch!  I have just tested the patch on my MacBookAir9,1
> with some modifications to make it patch with the master branch of the
> Linux kernel, and it works great!  The device is recognized by the
> system; and I can scan, pair, connect, and play audio just fine.  If
> you want me to send over the modified patch that I have used, please
> let me know.

Thanks for confirming. You should not need to modify the patch, though,
as it has been created against 6.7-rc6 and there hasn't been any changes
to this driver since rc1.

Johan

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Re: [PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[Neal Gompa]

On Wed, Dec 27, 2023 at 5:10 AM Johan Hovold <johan+linaro@kernel.org> wrote:
>
> A recent commit restored the original (and still documented) semantics
> for the HCI_QUIRK_USE_BDADDR_PROPERTY quirk so that the device address
> is considered invalid unless an address is provided by firmware.
>
> This specifically means that this flag must only be set for devices with
> invalid addresses, but the Broadcom BCM4377 driver has so far been
> setting this flag unconditionally.
>
> Fortunately the driver already checks for invalid addresses during setup
> and sets the HCI_QUIRK_INVALID_BDADDR flag, which can simply be replaced
> with HCI_QUIRK_USE_BDADDR_PROPERTY to indicate that the default address
> is invalid but can be overridden by firmware (long term, this should
> probably just always be allowed).
>
> Fixes: 6945795bc81a ("Bluetooth: fix use-bdaddr-property quirk")
> Cc: stable@vger.kernel.org      # 6.5
> Reported-by: Felix Zhang <mrman@mrman314.tech>
> Link: https://lore.kernel.org/r/77419ffacc5b4875e920e038332575a2a5bff29f.camel@mrman314.tech/
> Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
> ---
>  drivers/bluetooth/hci_bcm4377.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_bcm4377.c b/drivers/bluetooth/hci_bcm4377.c
> index a61757835695..9a7243d5db71 100644
> --- a/drivers/bluetooth/hci_bcm4377.c
> +++ b/drivers/bluetooth/hci_bcm4377.c
> @@ -1417,7 +1417,7 @@ static int bcm4377_check_bdaddr(struct bcm4377_data *bcm4377)
>
>         bda = (struct hci_rp_read_bd_addr *)skb->data;
>         if (!bcm4377_is_valid_bdaddr(bcm4377, &bda->bdaddr))
> -               set_bit(HCI_QUIRK_INVALID_BDADDR, &bcm4377->hdev->quirks);
> +               set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &bcm4377->hdev->quirks);
>
>         kfree_skb(skb);
>         return 0;
> @@ -2368,7 +2368,6 @@ static int bcm4377_probe(struct pci_dev *pdev, const struct pci_device_id *id)
>         hdev->set_bdaddr = bcm4377_hci_set_bdaddr;
>         hdev->setup = bcm4377_hci_setup;
>
> -       set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
>         if (bcm4377->hw->broken_mws_transport_config)
>                 set_bit(HCI_QUIRK_BROKEN_MWS_TRANSPORT_CONFIG, &hdev->quirks);
>         if (bcm4377->hw->broken_ext_scan)
> --
> 2.41.0
>
>

Looks good to me. This replaces the other patch[1], I take it?

Reviewed-by: Neal Gompa <neal@gompa.dev>

[1]: https://lore.kernel.org/asahi/aaa107865f4cbd61f8f9006fd3e7ac43b5d1bdad.camel@mrman314.tech/

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Re: [PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[Johan Hovold]

On Fri, Dec 29, 2023 at 10:11:32AM -0500, Neal Gompa wrote:
> On Wed, Dec 27, 2023 at 5:10 AM Johan Hovold <johan+linaro@kernel.org> wrote:
> >
> > A recent commit restored the original (and still documented) semantics
> > for the HCI_QUIRK_USE_BDADDR_PROPERTY quirk so that the device address
> > is considered invalid unless an address is provided by firmware.
> >
> > This specifically means that this flag must only be set for devices with
> > invalid addresses, but the Broadcom BCM4377 driver has so far been
> > setting this flag unconditionally.
> >
> > Fortunately the driver already checks for invalid addresses during setup
> > and sets the HCI_QUIRK_INVALID_BDADDR flag, which can simply be replaced
> > with HCI_QUIRK_USE_BDADDR_PROPERTY to indicate that the default address
> > is invalid but can be overridden by firmware (long term, this should
> > probably just always be allowed).
> >
> > Fixes: 6945795bc81a ("Bluetooth: fix use-bdaddr-property quirk")
> > Cc: stable@vger.kernel.org      # 6.5
> > Reported-by: Felix Zhang <mrman@mrman314.tech>
> > Link: https://lore.kernel.org/r/77419ffacc5b4875e920e038332575a2a5bff29f.camel@mrman314.tech/
> > Signed-off-by: Johan Hovold <johan+linaro@kernel.org>

> Looks good to me. This replaces the other patch[1], I take it?

Yes, but as Sven explained here, that patch is also correct even though
that wasn't obvious from just reading the commit message (which should
be amended in my opinion):

	https://lore.kernel.org/asahi/AB87C916-9CF9-4B8C-AFF5-74CA4151C4FC@svenpeter.dev/
 
> Reviewed-by: Neal Gompa <neal@gompa.dev>

Thanks for reviewing.

> [1]: https://lore.kernel.org/asahi/aaa107865f4cbd61f8f9006fd3e7ac43b5d1bdad.camel@mrman314.tech/

Johan

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Re: [PATCH] Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid

[patchwork-bot+bluetooth]

Hello:

This patch was applied to bluetooth/bluetooth-next.git (master)
by Luiz Augusto von Dentz <luiz.von.dentz@intel.com>:

On Wed, 27 Dec 2023 11:10:03 +0100 you wrote:
> A recent commit restored the original (and still documented) semantics
> for the HCI_QUIRK_USE_BDADDR_PROPERTY quirk so that the device address
> is considered invalid unless an address is provided by firmware.
> 
> This specifically means that this flag must only be set for devices with
> invalid addresses, but the Broadcom BCM4377 driver has so far been
> setting this flag unconditionally.
> 
> [...]

Here is the summary with links:
  - Bluetooth: hci_bcm4377: do not mark valid bd_addr as invalid
    https://git.kernel.org/bluetooth/bluetooth-next/c/cceb1ba62823

You are awesome, thank you!
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