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    Subject[PATCH 5.10 062/130] i2c: stm32f7: recover the bus on access timeout
    Date
    From: Alain Volmat <alain.volmat@foss.st.com>

    commit b933d1faf8fa30d16171bcff404e39c41b2a7c84 upstream.

    When getting an access timeout, ensure that the bus is in a proper
    state prior to returning the error.

    Fixes: aeb068c57214 ("i2c: i2c-stm32f7: add driver")
    Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
    Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@foss.st.com>
    Signed-off-by: Wolfram Sang <wsa@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/i2c/busses/i2c-stm32f7.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/drivers/i2c/busses/i2c-stm32f7.c
    +++ b/drivers/i2c/busses/i2c-stm32f7.c
    @@ -1681,6 +1681,7 @@ static int stm32f7_i2c_xfer(struct i2c_a
    i2c_dev->msg->addr);
    if (i2c_dev->use_dma)
    dmaengine_terminate_all(dma->chan_using);
    + stm32f7_i2c_wait_free_bus(i2c_dev);
    ret = -ETIMEDOUT;
    }

    @@ -1738,6 +1739,7 @@ static int stm32f7_i2c_smbus_xfer(struct
    dev_dbg(dev, "Access to slave 0x%x timed out\n", f7_msg->addr);
    if (i2c_dev->use_dma)
    dmaengine_terminate_all(dma->chan_using);
    + stm32f7_i2c_wait_free_bus(i2c_dev);
    ret = -ETIMEDOUT;
    goto pm_free;
    }

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