dmaengine: dmatest: Restore default for channel

In case of dmatest is built-in and no channel was configured test
doesn't run with:

dmatest: Could not start test, no channels configured

Even though description to "channel" parameter claims that default is
any.

Add default channel back as it used to be rather than reject test with
no channel configuration.

Fixes: d53513d5dc285d9a95a534fc41c5c08af6b60eac ("dmaengine: dmatest: Add support for multi channel testing)
Reported-by: Dijil Mohan <Dijil.Mohan@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Link: https://lore.kernel.org/r/20200429071522.58148-1-vladimir.murzin@arm.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 364dd34799d45cf490e19f7062eae2139f504d4c..0425984db118a9a88735b96b155e365a66fe3969 100644 (file)
--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -1166,10 +1166,11 @@ static int dmatest_run_set(const char *val, const struct kernel_param *kp)
                mutex_unlock(&info->lock);
                return ret;
        } else if (dmatest_run) {
-               if (is_threaded_test_pending(info))
-                       start_threaded_tests(info);
-               else
-                       pr_info("Could not start test, no channels configured\n");
+               if (!is_threaded_test_pending(info)) {
+                       pr_info("No channels configured, continue with any\n");
+                       add_threaded_test(info);
+               }
+               start_threaded_tests(info);
        } else {
                stop_threaded_test(info);
        }