linux-kernel - Re: [PATCH v1] Revert "mmc: sdhci-tegra: drop ->get

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Message-ID: <8c550eae-37f8-1176-2fa4-1a17fcacd5e7@intel.com>
Date:   Mon, 12 Aug 2019 12:36:58 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     linux-mmc@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] Revert "mmc: sdhci-tegra: drop ->get_ro()
 implementation"

On 9/08/19 1:24 AM, Dmitry Osipenko wrote:
> The WRITE_PROTECT bit is always in a "protected mode" on Tegra and
> WP-GPIO state need to be used instead. In a case of the GPIO absence,
> write-enable should be assumed. External SD is writable once again as
> a result of this patch because the offending commit changed behaviour for
> the case of a missing WP-GPIO to fall back to WRITE_PROTECT bit-checking,
> which is incorrect for Tegra.
> 
> Cc: stable@...r.kernel.org # v5.1+
> Fixes: e8391453e27f ("mmc: sdhci-tegra: drop ->get_ro() implementation")
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>