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| author | Dan Williams <dan.j.williams@intel.com> | 2008-12-03 17:16:55 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2008-12-03 17:16:55 -0700 |
| commit | 532d3b1f86f41834a25373e3ded981d68e4ce17f (patch) | |
| tree | ed025b991fe3efcee1b739faae534e26e20a2a4d /drivers/dma | |
| parent | 4ffaf869c7780bbdfc11291e5fd4b61dde662b1c (diff) | |
| download | lwn-532d3b1f86f41834a25373e3ded981d68e4ce17f.tar.gz lwn-532d3b1f86f41834a25373e3ded981d68e4ce17f.zip | |
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>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/ioat_dma.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c index ecd743f7cc61..6607fdd00b1c 100644 --- a/drivers/dma/ioat_dma.c +++ b/drivers/dma/ioat_dma.c @@ -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) { |