Hi Chen-Yu,
> The code path for Macs goes through bcm_apple_get_resources(), which
> skips over the code that sets up the regulator supplies. As a result,
> the call to regulator_bulk_enable() / regulator_bulk_disable() results
> in a NULL pointer dereference.
>
> This was reported on the kernel.org Bugzilla, bug 202963.
>
> Unbreak Broadcom Bluetooth support on Intel Macs by checking if the
> supplies were set up before enabling or disabling them.
>
> The same does not need to be done for the clocks, as the common clock
> framework API checks for NULL pointers.
>
> Fixes: 75d11676dccb ("Bluetooth: hci_bcm: Add support for regulator supplies")
> Cc: <stable@xxxxxxxxxxxxxxx> # 5.0.x
> Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
> ---
>
> I do not own a Mac, so this needs to be tested by someone else.
>
> ---
> drivers/bluetooth/hci_bcm.c | 20 ++++++++++++++++----
> 1 file changed, 16 insertions(+), 4 deletions(-)
patch has been applied to bluetooth-next tree.
Regards
Marcel
