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| author | Dan Williams <dan.j.williams@intel.com> | 2009-01-06 11:38:22 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-01-06 11:38:22 -0700 |
| commit | b9bdcbba010c2e49c8f837ea7a49fe006b636f41 (patch) | |
| tree | 030af2c964995a691d33aab19c8f07b04c5c3437 /drivers/dma | |
| parent | 652afc27b26859a0ea5f6db681d80b83d2c43cf8 (diff) | |
| download | lwn-b9bdcbba010c2e49c8f837ea7a49fe006b636f41.tar.gz lwn-b9bdcbba010c2e49c8f837ea7a49fe006b636f41.zip | |
ioat: fix self test for multi-channel case
In the multiple device case we need to re-arm the completion and protect
against concurrent self-tests. The printk from the test callback is
removed as it can arbitrarily delay completion of the test.
Cc: <stable@kernel.org>
Cc: 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 | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/dma/ioat_dma.c b/drivers/dma/ioat_dma.c index e42e1aea0f18..b3759c4b6536 100644 --- a/drivers/dma/ioat_dma.c +++ b/drivers/dma/ioat_dma.c @@ -1340,12 +1340,11 @@ 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); + struct completion *cmp = dma_async_param; + + complete(cmp); } /** @@ -1362,6 +1361,7 @@ static int ioat_dma_self_test(struct ioatdma_device *device) dma_addr_t dma_dest, dma_src; dma_cookie_t cookie; int err = 0; + struct completion cmp; src = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL); if (!src) @@ -1401,8 +1401,9 @@ static int ioat_dma_self_test(struct ioatdma_device *device) } async_tx_ack(tx); + init_completion(&cmp); tx->callback = ioat_dma_test_callback; - tx->callback_param = (void *)0x8086; + tx->callback_param = &cmp; cookie = tx->tx_submit(tx); if (cookie < 0) { dev_err(&device->pdev->dev, @@ -1412,7 +1413,7 @@ static int ioat_dma_self_test(struct ioatdma_device *device) } device->common.device_issue_pending(dma_chan); - wait_for_completion_timeout(&test_completion, msecs_to_jiffies(3000)); + wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000)); if (device->common.device_is_tx_complete(dma_chan, cookie, NULL, NULL) != DMA_SUCCESS) { |