From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfram Sang Date: Wed, 14 Jan 2015 14:16:28 +0000 Subject: [PATCH] dmaengine: of: bail out early if "dmas" property is not present Message-Id: <1421244988-11794-1-git-send-email-wsa@the-dreams.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: dmaengine@vger.kernel.org Cc: linux-sh@vger.kernel.org, Wolfram Sang , Magnus Damm , Simon Horman , Laurent Pinchart , Geert Uytterhoeven , Philipp Zabel , Vinod Koul , linux-kernel@vger.kernel.org From: Wolfram Sang And don't print an error: not configured is not an error. Reported-by: Philipp Zabel Signed-off-by: Wolfram Sang --- In response to Philipp's patch silencing the warning in the driver: http://patchwork.ozlabs.org/patch/425696/ I think this should be handled in the core. drivers/dma/of-dma.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c index d5fbeaa1e7ba..ca31f1b45366 100644 --- a/drivers/dma/of-dma.c +++ b/drivers/dma/of-dma.c @@ -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", -- 2.1.3