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Commit 49daee55 authored by Daniel Thompson's avatar Daniel Thompson Committed by Greg Kroah-Hartman
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Documentation: dmaengine: Correctly describe dmatest with channel unset 



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: default avatarDaniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20211118100952.27268-3-daniel.thompson@linaro.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 05594394

Documentation/driver-api/dmaengine/dmatest.rst

+4 −3
Original line number Diff line number Diff line
@@ -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.