linux-kernel - Re: [RFC PATCH 1/2] mmc: sdhci: add quirk SDHCI_QUIRK2_BROKEN_SDMA_BOUNDARY

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Date:   Mon, 17 Jul 2017 17:50:26 +0100
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: Re: [RFC PATCH 1/2] mmc: sdhci: add quirk
 SDHCI_QUIRK2_BROKEN_SDMA_BOUNDARY_BUFFER



On 17/07/17 13:47, Adrian Hunter wrote:
>> This change seems like a reasonable justification for adding a new
>> SDHCI quirk, even if we in general wants to avoid that.
>>
>> Adrian?
> If we add a quirk for every register we end up with a very ugly version of
> CONFIG_MMC_SDHCI_IO_ACCESSORS.  So CONFIG_MMC_SDHCI_IO_ACCESSORS is a better
> option.  Another possibility is to add a member to struct sdhci_host,
> initialized to SDHCI_DEFAULT_BOUNDARY_ARG, and write that.  Drivers could
> then change the value if necessary.
Second option seems to be better one. I will give it a try and see!

thanks,
srini