From 3e5ccd866fdf3a1e1d4d2c08c81f861ad6798d32 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 4 Mar 2013 11:09:31 +0200 Subject: dmatest: return actual state in 'run' file The following command should return actual state of the test. % cat /sys/kernel/debug/dmatest/run To wait for test done the user may perform a busy loop that checks the state. % while [ $(cat /sys/kernel/debug/dmatest/run) = "Y" ] > do > echo -n "." > sleep 1 > done > echo Signed-off-by: Andy Shevchenko Signed-off-by: Vinod Koul --- drivers/dma/dmatest.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) (limited to 'drivers/dma') diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index fc31542e7200..d19234b08342 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -93,6 +93,7 @@ struct dmatest_thread { u8 **srcs; u8 **dsts; enum dma_transaction_type type; + bool done; }; struct dmatest_chan { @@ -603,6 +604,8 @@ err_thread_type: if (ret) dmaengine_terminate_all(chan); + thread->done = true; + if (params->iterations > 0) while (!kthread_should_stop()) { DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wait_dmatest_exit); @@ -884,12 +887,28 @@ static ssize_t dtf_read_run(struct file *file, char __user *user_buf, { struct dmatest_info *info = file->private_data; char buf[3]; + struct dmatest_chan *dtc; + bool alive = false; mutex_lock(&info->lock); - if (info->nr_channels) + list_for_each_entry(dtc, &info->channels, node) { + struct dmatest_thread *thread; + + list_for_each_entry(thread, &dtc->threads, node) { + if (!thread->done) { + alive = true; + break; + } + } + } + + if (alive) { buf[0] = 'Y'; - else + } else { + __stop_threaded_test(info); buf[0] = 'N'; + } + mutex_unlock(&info->lock); buf[1] = '\n'; buf[2] = 0x00; -- cgit v1.2.3