linux-kernel - Re: [PATCH 14/18] Blackfin Serial Driver: use the DLAB macro to hide variant differences

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Date:	Fri, 6 Mar 2009 17:41:35 -0500
From:	Mike Frysinger <vapier.adi@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Bryan Wu <cooloney@...nel.org>, alan@...rguk.ukuu.org.uk,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/18] Blackfin Serial Driver: use the DLAB macro to hide 
	variant differences

On Fri, Mar 6, 2009 at 17:38, Andrew Morton wrote:
> On Fri,  6 Mar 2009 14:42:56 +0800 Bryan Wu wrote:
>> From: Mike Frysinger <vapier.adi@...il.com>
>>
>> Signed-off-by: Mike Frysinger <vapier.adi@...il.com>
>> Signed-off-by: Bryan Wu <cooloney@...nel.org>
>> ---
>>  drivers/serial/bfin_5xx.c |    8 ++------
>>  1 files changed, 2 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
>> index b89861d..71a9e6b 100644
>> --- a/drivers/serial/bfin_5xx.c
>> +++ b/drivers/serial/bfin_5xx.c
>> @@ -1250,7 +1250,7 @@ struct console __init *bfin_earlyserial_init(unsigned int port,
>>  void bfin_serial_debug(const char *fmt, ...)
>>  {
>>       struct bfin_serial_port *uart = &bfin_serial_ports[0];
>> -     unsigned short status, tmp;
>> +     unsigned short status;
>>       unsigned long flags;
>>       int i, count;
>>       char buf[128];
>> @@ -1273,11 +1273,7 @@ void bfin_serial_debug(const char *fmt, ...)
>>                       status = UART_GET_LSR(uart);
>>               } while (!(status & THRE));
>>
>> -#ifndef CONFIG_BF54x
>> -             tmp = UART_GET_LCR(uart);
>> -             tmp &= ~DLAB;
>> -             UART_PUT_LCR(uart, tmp);
>> -#endif
>> +             UART_CLEAR_DLAB(uart);
>>               UART_PUT_CHAR(uart, buf[i]);
>>               if (buf[i] == '\n') {
>>                       do {
>
> This appears to be a small cleanup, not a bugfix.
>
> I'm OK with sneaking the odd non-bugfix into late -rc by accident -
> it's not teribly important, and getting the main bugs fixed overwhelms
> such considerations.
>
> However I have a sneaky suspicion that this patch might actually fix a
> bug, only we weren't told about it?

fixes an unused var warning.  not really a "bug", but ...
-mike
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