From 54f919a04cf221bc1601d1193682d4379dacacbd Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Wed, 29 Aug 2018 23:32:44 +0200
Subject: [PATCH] dmaengine: dma-jz4780: Return error if not probed from DT
The driver calls clk_get() with the clock name set to NULL, which means
that the driver could only work when probed from devicetree. From now
on, we explicitly require the driver to be probed from devicetree.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Tested-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
drivers/dma/dma-jz4780.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 85820a2d69d48..987899610b461 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -761,6 +761,11 @@ static int jz4780_dma_probe(struct platform_device *pdev)
struct resource *res;
int i, ret;
+ if (!dev->of_node) {
+ dev_err(dev, "This driver must be probed from devicetree\n");
+ return -EINVAL;
+ }
+
jzdma = devm_kzalloc(dev, sizeof(*jzdma), GFP_KERNEL);
if (!jzdma)
return -ENOMEM;
--
2.30.2