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    Subject[PATCH 5.10 491/563] Documentation: dmaengine: Correctly describe dmatest with channel unset
    Date
    From: Daniel Thompson <daniel.thompson@linaro.org>

    commit c61d7b2ef141abf81140756b45860a2306f395a2 upstream.

    Currently the documentation states that channels must be configured before
    running the dmatest. This has not been true since commit 6b41030fdc79
    ("dmaengine: dmatest: Restore default for channel"). Fix accordingly.

    Fixes: 6b41030fdc79 ("dmaengine: dmatest: Restore default for channel")
    Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
    Link: https://lore.kernel.org/r/20211118100952.27268-3-daniel.thompson@linaro.org
    Signed-off-by: Vinod Koul <vkoul@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    Documentation/driver-api/dmaengine/dmatest.rst | 7 ++++---
    1 file changed, 4 insertions(+), 3 deletions(-)

    --- a/Documentation/driver-api/dmaengine/dmatest.rst
    +++ b/Documentation/driver-api/dmaengine/dmatest.rst
    @@ -143,13 +143,14 @@ Part 5 - Handling channel allocation
    Allocating Channels
    -------------------

    -Channels are required to be configured prior to starting the test run.
    -Attempting to run the test without configuring the channels will fail.
    +Channels do not need to be configured prior to starting a test run. Attempting
    +to run the test without configuring the channels will result in testing any
    +channels that are available.

    Example::

    % echo 1 > /sys/module/dmatest/parameters/run
    - dmatest: Could not start test, no channels configured
    + dmatest: No channels configured, continue with any

    Channels are registered using the "channel" parameter. Channels can be requested by their
    name, once requested, the channel is registered and a pending thread is added to the test list.

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