[PATCH] tty: serial: 8250_core: restore the LCR register in set_sleep

[Sudhir Sreedharan]

Hi Kevin,

On Thu, Oct 16, 2014 at 12:51 PM, Kevin Hilman <khilman at kernel.org> wrote:
> Sudhir Sreedharan <ssreedharan at mvista.com> writes:
>
>> In ST16650V2 based serial uarts, while initalizing the PM state,
>> LCR registers are being initialized to 0 in serial8250_set_sleep().
>> If console port is already initialized and being used, this will
>> throws garbage in the console.
>>
>> Signed-off-by: Sudhir Sreedharan <ssreedharan at mvista.com>
>
> Since this caused regressions in -next last time, could you describe how
> this was tested, and on what platforms?

I have tested this on arm64 board((U6_16550A)),PowerPC P5040
board(16550A)), x86-64 (haswell(ST16650V2),  Rangeley(16550A)) board.
This patch will modify only for the 8250 based serial devices.

Test Case : Booting Multiple times, suspend-resume.

Thanks,
Sudhir

>
> Thanks,
>
> Kevin