[PATCH 5.6 079/126] dmaengine: dmatest: Restore default for channel

From: Greg Kroah-Hartman
Date: Tue May 26 2020 - 15:18:11 EST

From: Vladimir Murzin <vladimir.murzin@xxxxxxx>

commit 6b41030fdc79086db5d673c5ed7169f3ee8c13b9 upstream.

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

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@xxxxxxx>
Signed-off-by: Vladimir Murzin <vladimir.murzin@xxxxxxx>
Link: https://lore.kernel.org/r/20200429071522.58148-1-vladimir.murzin@xxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/dma/dmatest.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

--- a/drivers/dma/dmatest.c
+++ b/drivers/dma/dmatest.c
@@ -1166,10 +1166,11 @@ static int dmatest_run_set(const char *v
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 {