linux-kernel - Re: [PATCH v2] clocksource/drivers/fttmr010: fix invalid interrupt register access

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Message-ID: <279e6a06-3f2f-e736-f28e-4d099729a517@linaro.org>
Date:   Mon, 5 Nov 2018 19:50:31 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Tao Ren <taoren@...com>, Thomas Gleixner <tglx@...utronix.de>
Cc:     Joel Stanley <joel@....id.au>, Andrew Jeffery <andrew@...id.au>,
        Yu Lei <mine260309@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
        OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH v2] clocksource/drivers/fttmr010: fix invalid interrupt
 register access

On 05/11/2018 19:43, Tao Ren wrote:
> On 10/7/18, 2:03 PM, "Linus Walleij" <linus.walleij@...aro.org> wrote:
>>
>> On Wed, Oct 3, 2018 at 11:54 PM Tao Ren <taoren@...com> wrote:
>>
>>> TIMER_INTR_MASK register (Base Address of Timer + 0x38) is not designed
>>> for masking interrupts on ast2500 chips, and it's not even listed in
>>> ast2400 datasheet, so it's not safe to access TIMER_INTR_MASK on aspeed
>>> chips.
>>>
>>> Similarly, TIMER_INTR_STATE register (Base Address of Timer + 0x34) is
>>> not interrupt status register on ast2400 and ast2500 chips. Although
>>> there is no side effect to reset the register in fttmr010_common_init(),
>>> it's just misleading to do so.
>>>
>>> Besides, "count_down" is renamed to "is_aspeed" in "fttmr010" structure,
>>> and more comments are added so the code is more readble.
>>>
>>> Signed-off-by: Tao Ren <taoren@...com>
>>> ---
>>> Changes in v2:
>>>   - "count_down" is renamed to "is_aspeed" in "fttmr010" structure.
>>>   - more comments are added to make the code more readable.
>>  
>> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> 
> Hi Daniel / Thomas,
> 
> Any further comments on the patch? Or is there anything needed from my side?

Oh right, sorry. Should it go to stable also ? Is there a Fixes tag it
can apply ?


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