From 6b41030fdc79086db5d673c5ed7169f3ee8c13b9 Mon Sep 17 00:00:00 2001
From: Vladimir Murzin <vladimir.murzin@arm.com>
Date: Wed, 29 Apr 2020 08:15:22 +0100
Subject: [PATCH] dmaengine: dmatest: Restore default for channel
Git-commit: 6b41030fdc79086db5d673c5ed7169f3ee8c13b9
Patch-mainline: v5.7-rc7
References: git-fixes

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>
Acked-by: Takashi Iwai <tiwai@suse.de>

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

diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c
index 364dd34799d4..0425984db118 100644
--- 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);
 	}
-- 
2.16.4