dma: mv_xor: Add a device_control function
The dmatest module for DMA engines calls device_control(dtc->chan, DMA_TERMINATE_ALL, 0); after completing the tests. The documentation in include/linux/dmaengine.h suggests this function is optional and dma_async_device_register() also does not BUG_ON() when not passed a function. However, dmatest is not the only code in the kernel unconditionally calling device_control. So add an implementation indicating all operations are not implemented. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
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@ -1070,6 +1070,14 @@ out:
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return err;
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}
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/* This driver does not implement any of the optional DMA operations. */
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static int
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mv_xor_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
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unsigned long arg)
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{
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return -ENOSYS;
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}
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static int mv_xor_channel_remove(struct mv_xor_chan *mv_chan)
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{
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struct dma_chan *chan, *_chan;
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@ -1130,6 +1138,7 @@ mv_xor_channel_add(struct mv_xor_device *xordev,
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dma_dev->device_free_chan_resources = mv_xor_free_chan_resources;
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dma_dev->device_tx_status = mv_xor_status;
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dma_dev->device_issue_pending = mv_xor_issue_pending;
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dma_dev->device_control = mv_xor_control;
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dma_dev->dev = &pdev->dev;
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/* set prep routines based on capability */
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