linux-kernel - Re: [PATCH] mmc: sdhci-iproc: suppress spurious interrupt with Multiblock read

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Message-ID: <CAPDyKFrDZXHqrb-GcXrgvCMaUAhpOXDd-OdPyRw1Qq54cSxZDg@mail.gmail.com>
Date:   Mon, 22 May 2017 14:01:02 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Srinath Mannam <srinath.mannam@...adcom.com>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Jon Mason <jonmason@...adcom.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdhci-iproc: suppress spurious interrupt with
 Multiblock read

On 22 May 2017 at 13:52, Srinath Mannam <srinath.mannam@...adcom.com> wrote:
> On Fri, May 19, 2017 at 11:55 AM, Adrian Hunter <adrian.hunter@...el.com> wrote:
>> On 18/05/17 19:57, Srinath Mannam wrote:
>>> The stingray SDHCI hardware supports ACMD12 and automatically
>>> issues after multi block transfer completed.
>>>
>>> If ACMD12 in SDHCI is disabled, spurious tx done interrupts are seen
>>> on multi block read command with below error message:
>>>
>>> Got data interrupt 0x00000002 even though no data
>>> operation was in progress.
>>>
>>> This patch uses SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 to enable
>>> ACM12 support in SDHCI hardware and suppress spurious interrupt.
>>>
>>> Signed-off-by: Srinath Mannam <srinath.mannam@...adcom.com>
>>> Reviewed-by: Ray Jui <ray.jui@...adcom.com>
>>> Reviewed-by: Scott Branden <scott.branden@...adcom.com>
>>
>> Acked-by: Adrian Hunter <adrian.hunter@...el.com>
>
> Thanks Adrian...
>
> Will it be possible to take this for Linux-4.12??

It's queued for 4.13, however are you saying it's a regression for
4.12? Then what commit fixes it?

Perhaps you even want this to go stable?

Kind regards
Uffe