linux-kernel - Re: [PATCH] i2c: aspeed: Add newline characters into message printings.

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Message-ID: <41770e0f-c0ab-5fb7-6c8f-6cf4f80f01f0@linux.intel.com>
Date:   Thu, 12 Jul 2018 10:10:29 -0700
From:   Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com>
To:     Brendan Higgins <brendanhiggins@...gle.com>, joe@...ches.com
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>, linux-i2c@...r.kernel.org,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-aspeed@...ts.ozlabs.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        jarkko.nikula@...ux.intel.com, james.feist@...ux.intel.com,
        vernon.mauery@...ux.intel.com
Subject: Re: [PATCH] i2c: aspeed: Add newline characters into message
 printings.

On 7/12/2018 1:38 AM, Brendan Higgins wrote:
> On Wed, Jul 11, 2018 at 10:10 AM Joe Perches <joe@...ches.com> wrote:
>>
>> On Wed, 2018-07-11 at 09:53 -0700, Jae Hyun Yoo wrote:
>>> On 7/10/2018 10:42 PM, Brendan Higgins wrote:
>>>> On Mon, Jul 2, 2018 at 2:14 PM Jae Hyun Yoo <jae.hyun.yoo@...ux.intel.com> wrote:
>>>>> There are some log printing without a newline character. This
>>>>> patch adds the missing newline characters.
>> []
>>>>> diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
>> []
>>>>> @@ -431,7 +431,7 @@ static bool aspeed_i2c_master_irq(struct aspeed_i2c_bus *bus)
>>>>>            */
>>>>>           if (bus->master_state == ASPEED_I2C_MASTER_START) {
>>>>>                   if (unlikely(!(irq_status & ASPEED_I2CD_INTR_TX_ACK))) {
>>>>> -                       pr_devel("no slave present at %02x", msg->addr);
>>>>> +                       pr_devel("no slave present at %02x\n", msg->addr);
>>>>
>>>> Unless something changed in the last couple versions of the kernel, this is the
>>>> only line that actually changes anything. dev_* inserts a newline for every
>>>> call.
>>
>> Not true.
>>
>> Any printk without KERN_CONT inserts a newline
>> if the last character
>> emitted is not a newline.
>>
>> dev_<level> uses can also be followed by pr_cont.
>>
>> So this patch does reduce the possibility of
>> interleaved messages from multiple processes.
> 
> My mistake. Thanks for pointing that out.
> 
> Jae, forget what I said earlier. This looks good to me.
> 

Okay. I'll keep this patch as is.
Thanks Joe for your clarification!
Thanks Brendan for your 'Reviewed-by' tag!

Jae