dmaengine: dw-axi-dmac: Only start idle channels #6464
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Attempting to start a non-idle channel causes an error message to be logged, and is inefficient. Test for emptiness of the desc_issued list before doing so. Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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Any comments, @P33M? Given that the decision is taken under the same lock as all the queue handling, I believe it is safe. I2S and UART DMA have been tested. |
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Attempting to start a non-idle channel causes an error message to be logged, and is inefficient. Test for emptiness of the desc_issued list before doing so.