Messages in this thread Patch in this message | | | From | Nicolas Ferre <> | Subject | [PATCH] dmaengine: dmatest: add a maximum number of test iterations | Date | Fri, 3 Jul 2009 19:26:51 +0200 |
| |
The dmatest usually waits for the killing of its kthreads to stop running tests. This patch adds a parameter that sets a maximum number of test iterations.
This feature is quite interesting for debugging when you set a lot of traces in your dmaengine controller driver.
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> --- drivers/dma/dmatest.c | 15 ++++++++++++++- 1 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index fb7da51..0131a1f 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -38,6 +38,11 @@ module_param(max_channels, uint, S_IRUGO); MODULE_PARM_DESC(max_channels, "Maximum number of channels to use (default: all)"); +static unsigned int iteration_nbr = 0; +module_param(iteration_nbr, uint, S_IRUGO); +MODULE_PARM_DESC(iteration_nbr, + "Iteration number before stopping test (default: infinite)"); + static unsigned int xor_sources = 3; module_param(xor_sources, uint, S_IRUGO); MODULE_PARM_DESC(xor_sources, @@ -270,7 +275,8 @@ static int dmatest_func(void *data) flags = DMA_CTRL_ACK | DMA_COMPL_SKIP_DEST_UNMAP | DMA_PREP_INTERRUPT; - while (!kthread_should_stop()) { + while (!kthread_should_stop() + && !(iteration_nbr && total_tests >= iteration_nbr)) { struct dma_device *dev = chan->device; struct dma_async_tx_descriptor *tx = NULL; dma_addr_t dma_srcs[src_cnt]; @@ -416,6 +422,13 @@ err_srcbuf: err_srcs: pr_notice("%s: terminating after %u tests, %u failures (status %d)\n", thread_name, total_tests, failed_tests, ret); + + if (iteration_nbr > 0) + while (!kthread_should_stop()) { + DECLARE_WAIT_QUEUE_HEAD(wait_dmatest_exit); + interruptible_sleep_on(&wait_dmatest_exit); + } + return ret; } -- 1.5.3.7
| |