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Date: Mon, 24 Jan 2022 19:44:14 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Daniel Thompson <daniel.thompson@...aro.org>, Vinod Koul <vkoul@...nel.org> Subject: [PATCH 5.15 737/846] Documentation: dmaengine: Correctly describe dmatest with channel unset From: Daniel Thompson <daniel.thompson@...aro.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@...aro.org> Link: https://lore.kernel.org/r/20211118100952.27268-3-daniel.thompson@linaro.org Signed-off-by: Vinod Koul <vkoul@...nel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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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