diff options
| -rw-r--r-- | Documentation/dmatest.txt | 12 | ||||
| -rw-r--r-- | drivers/dma/dmatest.c | 23 |
2 files changed, 33 insertions, 2 deletions
diff --git a/Documentation/dmatest.txt b/Documentation/dmatest.txt index 9a90729bdee6..3e17b55a8ba3 100644 --- a/Documentation/dmatest.txt +++ b/Documentation/dmatest.txt @@ -36,6 +36,18 @@ in the original code. Note that running a new test will stop any in progress test. +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 + Part 3 - When built-in in the kernel... The module parameters that is supplied to the kernel command line will be used 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; |