linux-kernel - Re: [PATCH 2/4] serial: qcom-geni: fix DMA mapping leak on shutdown

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Message-ID: <CAD=FV=UO2hnu0pt2OggyQ0L6onohhzxeGbmtX6BQL7B_vciNpA@mail.gmail.com>
Date:   Tue, 7 Mar 2023 10:36:20 -0800
From:   Doug Anderson <dianders@...omium.org>
To:     Johan Hovold <johan+linaro@...nel.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] serial: qcom-geni: fix DMA mapping leak on shutdown

Hi,

On Tue, Mar 7, 2023 at 8:43 AM Johan Hovold <johan+linaro@...nel.org> wrote:
>
> Fix what appears to be a copy-paste error that can lead to a leaked DMA
> mapping on close() and failure to restart TX after the port is reopened.
>
> Note that rx_dma_addr is generally NULL when
> qcom_geni_serial_stop_tx_dma() is called as part of shutdown() (but
> tx_dma_addr need not be).
>
> Fixes: 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA")
> Cc: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
> ---
>  drivers/tty/serial/qcom_geni_serial.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Douglas Anderson <dianders@...omium.org>