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dmaengine: dma-jz4780: Return error if not probed from DT

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[ Upstream commit 54f919a04cf221bc1601d1193682d4379dacacbd ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paul Cercueil 2018-08-29 23:32:44 +02:00 committed by Greg Kroah-Hartman
parent 64b48a5cbe
commit 0bc6f0649b
1 changed files with 5 additions and 0 deletions
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5
drivers/dma/dma-jz4780.c
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@ -754,6 +754,11 @@ 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;