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ioat: wait for self-test completion
As part of the ioat_dma self-test it performs a printk from a completion callback. Depending on the system console configuration this output can take longer than a millisecond causing the self-test to fail. Introduce a completion with a generous timeout to mitigate this failure. Cc: <stable@kernel.org> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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1 changed files with 4 additions and 1 deletions
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@ -1341,10 +1341,12 @@ static void ioat_dma_start_null_desc(struct ioat_dma_chan *ioat_chan)
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*/
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#define IOAT_TEST_SIZE 2000
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DECLARE_COMPLETION(test_completion);
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static void ioat_dma_test_callback(void *dma_async_param)
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{
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printk(KERN_ERR "ioatdma: ioat_dma_test_callback(%p)\n",
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dma_async_param);
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complete(&test_completion);
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}
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/**
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@ -1410,7 +1412,8 @@ static int ioat_dma_self_test(struct ioatdma_device *device)
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goto free_resources;
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}
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device->common.device_issue_pending(dma_chan);
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msleep(1);
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wait_for_completion_timeout(&test_completion, msecs_to_jiffies(3000));
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if (device->common.device_is_tx_complete(dma_chan, cookie, NULL, NULL)
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!= DMA_SUCCESS) {
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