linux-kernel - Re: [PATCH v4] ARM: mmp: let clk_disable() return immediately if clk is NULL

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Date:   Sat, 28 Jan 2017 22:33:08 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Eric Miao <eric.y.miao@...il.com>,
        Haojian Zhuang <haojian.zhuang@...il.com>,
        Haojian Zhuang <haojian.zhuang@...aro.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Russell King <linux@...linux.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH v4] ARM: mmp: let clk_disable() return immediately if clk
 is NULL

Hi Eric Miao, Haojian Zhuang,

Ping again.

Please apply this patch!

2016-11-06 0:42 GMT+09:00 Masahiro Yamada <yamada.masahiro@...ionext.com>:
> Hi Eric Miao, Haojian Zhuang,
>
> Could you pick up this patch, please?
>
>
> 2016-09-19 2:58 GMT+09:00 Masahiro Yamada <yamada.masahiro@...ionext.com>:
>> In many of clk_disable() implementations, it is a no-op for a NULL
>> pointer input, but this is one of the exceptions.
>>
>> Making it treewide consistent will allow clock consumers to call
>> clk_disable() without NULL pointer check.
>>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>> ---
>>
>> Changes in v4:
>>   - Split into per-arch patches
>>
>> Changes in v3:
>>   - Return only when clk is NULL.  Do not take care of error pointer.
>>
>> Changes in v2:
>>   - Rebase on Linux 4.6-rc1
>>
>>  arch/arm/mach-mmp/clock.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/arm/mach-mmp/clock.c b/arch/arm/mach-mmp/clock.c
>> index ac6633d..28fe64c 100644
>> --- a/arch/arm/mach-mmp/clock.c
>> +++ b/arch/arm/mach-mmp/clock.c
>> @@ -67,6 +67,9 @@ void clk_disable(struct clk *clk)
>>  {
>>         unsigned long flags;
>>
>> +       if (!clk)
>> +               return;
>> +
>>         WARN_ON(clk->enabled == 0);
>>
>>         spin_lock_irqsave(&clocks_lock, flags);
>> --
>> 1.9.1
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
>
>
> --
> Best Regards
> Masahiro Yamada

-- 
Best Regards
Masahiro Yamada

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