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dmaengine: of: bail out early if "dmas" property is not present

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And don't print an error: not configured is not an error.

Reported-by: Philipp Zabel <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Acked-by: Philipp Zabel <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Wolfram Sang 2015-01-14 15:16:28 +01:00 • committed by Vinod Koul
commit c914570f28
1 changed files with 4 additions and 0 deletions
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4
drivers/dma/of-dma.c
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@ -159,6 +159,10 @@ struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
return ERR_PTR(-ENODEV);
}
/* Silently fail if there is not even the "dmas" property */
if (!of_find_property(np, "dmas", NULL))
return ERR_PTR(-ENODEV);
count = of_property_count_strings(np, "dma-names");
if (count < 0) {
pr_err("%s: dma-names property of node '%s' missing or empty\n",