netdev - Re: [PATCH v2 04/21] octeontx2-af: Relax resource lock into mutex

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Message-Id: <20181117.115443.1924467498930229204.davem@davemloft.net>
Date:   Sat, 17 Nov 2018 11:54:43 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     sunil.kovvuri@...il.com
Cc:     netdev@...r.kernel.org, arnd@...db.de, linux-soc@...r.kernel.org,
        skardach@...vell.com, sgoutham@...vell.com
Subject: Re: [PATCH v2 04/21] octeontx2-af: Relax resource lock into mutex

From: Sunil Kovvuri <sunil.kovvuri@...il.com>
Date: Sat, 17 Nov 2018 21:42:41 +0530

> On Sat, Nov 17, 2018 at 12:50 PM David Miller <davem@...emloft.net> wrote:
>>
>> From: sunil.kovvuri@...il.com
>> Date: Thu, 15 Nov 2018 16:29:29 +0530
>>
>> > From: Stanislaw Kardach <skardach@...vell.com>
>> >
>> > The resource locks does not need to be a spinlock as they are not
>> > used in any interrupt handling routines (only in bottom halves).
>> > Therefore relax them into a mutex so that later on we may use them
>> > in routines that might sleep.
>> >
>> > Signed-off-by: Stanislaw Kardach <skardach@...vell.com>
>> > Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
>>
>> This is confusing because software interrupts are often called bottom
>> halves, and in which sleeping and thus mutexes are not allowed.
> 
> Mailbox message interrupt handler schedules workqueue and exits.
> Message handling happens in workqueue context, hence moving from
> spinlock to mutex.
> Hope this clarifies.

Fix the commit message like this then.