linux-kernel - Re: [PATCH v2] mmc: meson: Fix usage of meson_mmc_post

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Message-ID: <7hiltbitiz.fsf@baylibre.com>
Date:   Fri, 18 Feb 2022 16:34:12 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Rong Chen <rong.chen@...ogic.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        1131046452@...com, linux-mmc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     45581586@...com, Rong Chen <rong.chen@...ogic.com>
Subject: Re: [PATCH v2] mmc: meson: Fix usage of meson_mmc_post_req()

Rong Chen <rong.chen@...ogic.com> writes:

> Currently meson_mmc_post_req() is called in meson_mmc_request() right
> after meson_mmc_start_cmd(). This could lead to DMA unmapping before the request
> is actually finished.
>
> To fix, don't call meson_mmc_post_req() until meson_mmc_request_done().
>
> Signed-off-by: Rong Chen <rong.chen@...ogic.com>

Reviewed-by: Kevin Hilman <khilman@...libre.com>