Re: [PATCH] serial: 8250_dw: Revert: Do not reclock if already at correct rate

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Fri, Apr 05, 2024 at 08:14:03AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
> On 29.03.24 13:12, Greg Kroah-Hartman wrote:
> > On Fri, Mar 29, 2024 at 12:42:14PM +0100, Hans de Goede wrote:
> >> On 3/29/24 3:35 AM, Peter Collingbourne wrote:
> >>> On Thu, Mar 28, 2024 at 5:35 AM Hans de Goede <hdegoede@redhat.com> wrote:
> >>>> On 3/28/24 8:10 AM, Hans de Goede wrote:
> >>>>> On 3/18/24 7:52 PM, Peter Collingbourne wrote:
> >>>>>> On Mon, Mar 18, 2024 at 3:36 AM Andy Shevchenko
> >>>>>> <andriy.shevchenko@linux.intel.com> wrote:
> >>>>>>>
> >>>>>>> On Sun, Mar 17, 2024 at 10:41:23PM +0100, Hans de Goede wrote:
> >>>>>>>> Commit e5d6bd25f93d ("serial: 8250_dw: Do not reclock if already at
> >>>>>>>> correct rate") breaks the dw UARTs on Intel Bay Trail (BYT) and
> >>>>>>>> Cherry Trail (CHT) SoCs.
> >>>>>>>>
> >>>>>>>> Before this change the RTL8732BS Bluetooth HCI which is found
> >>>>>>>> connected over the dw UART on both BYT and CHT boards works properly:
> >>>>>>>>
> >>>>>>>> Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=8723
> >>>>>>>> Bluetooth: hci0: RTL: rom_version status=0 version=1
> >>>>>>>> Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_fw.bin
> >>>>>>>> Bluetooth: hci0: RTL: loading rtl_bt/rtl8723bs_config-OBDA8723.bin
> >>>>>>>> Bluetooth: hci0: RTL: cfg_sz 64, total sz 24508
> >>>>>>>> Bluetooth: hci0: RTL: fw version 0x365d462e
> >>>>>>>>
> >>>>>>>> where as after this change probing it fails:
> > [...]
> >>> Acked-by: Peter Collingbourne <pcc@google.com>
> >>
> >> Thanks. Greg can we get this merged please
> >> (it is a regression fix for a 6.8 regression) ?
> > 
> > Will queue it up soon, thanks.
> 
> You are obviously busy (we really need to enhance Git so it can clone
> humans, too!), nevertheless: friendly reminder that that fix afaics
> still is not queued.

"soon" is relative :)

> Side note: there is another fix for a serial 6.8 regression I track
> waiting for review here:
> https://lore.kernel.org/linux-serial/20240325071649.27040-1-tony@atomide.com/

It's in my queue, I'll try to get to serial stuff later today, but not
promising anything...

thanks,

greg k-h