[PATCH 2/6] serial: meson: remove dead code in meson_uart_change_speed

[afaerber@suse.de (Andreas Färber)]

Am 17.04.2017 um 17:25 schrieb Neil Armstrong:
> On 04/16/2017 10:10 PM, Heiner Kallweit wrote:
>> val is set in both branches of the if clause, therefore the two
>> removed lines are dead code.
>>
>> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
>> ---
>>  drivers/tty/serial/meson_uart.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
>> index e2e25da1..22857f1e 100644
>> --- a/drivers/tty/serial/meson_uart.c
>> +++ b/drivers/tty/serial/meson_uart.c
>> @@ -298,8 +298,6 @@ static void meson_uart_change_speed(struct uart_port *port, unsigned long baud)
>>  	while (!meson_uart_tx_empty(port))
>>  		cpu_relax();
>>  
>> -	val = readl(port->membase + AML_UART_REG5);
>> -	val &= ~AML_UART_BAUD_MASK;
>>  	if (port->uartclk == 24000000) {
>>  		val = ((port->uartclk / 3) / baud) - 1;
>>  		val |= AML_UART_BAUD_XTAL;
>>
> 
> 
> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>

I've double-checked that this was already done before I added the
GXBB-enabling XTAL case:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/tty/serial/meson_uart.c?id=146f3808e08faabba46ea9574133a66aa4a9468d

Present since the beginning:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/tty/serial/meson_uart.c?id=ff7693d079e58fb62d735b7b8085b53fcfb74528

In general it is worth pointing out that reading a register may
sometimes be required - I hope that BayLibre have checked against the
manuals that this is not the case here? Assuming it is okay,

Reviewed-by: Andreas F?rber <afaerber@suse.de>

Regards,
Andreas

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