Commit 532d3b1f authored by Dan Williams's avatar Dan Williams

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: default avatarMaciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 4ffaf869
......@@ -1341,10 +1341,12 @@ static void ioat_dma_start_null_desc(struct ioat_dma_chan *ioat_chan)
*/
#define IOAT_TEST_SIZE 2000
DECLARE_COMPLETION(test_completion);
static void ioat_dma_test_callback(void *dma_async_param)
{
printk(KERN_ERR "ioatdma: ioat_dma_test_callback(%p)\n",
dma_async_param);
complete(&test_completion);
}
/**
......@@ -1410,7 +1412,8 @@ static int ioat_dma_self_test(struct ioatdma_device *device)
goto free_resources;
}
device->common.device_issue_pending(dma_chan);
msleep(1);
wait_for_completion_timeout(&test_completion, msecs_to_jiffies(3000));
if (device->common.device_is_tx_complete(dma_chan, cookie, NULL, NULL)
!= DMA_SUCCESS) {
......
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