From mboxrd@z Thu Jan 1 00:00:00 1970 From: Philipp Zabel Subject: [PATCH 1/3] i2c: imx: silence dma_request_slave_channel errors if dma not set up in device tree Date: Tue, 6 Jan 2015 15:48:19 +0100 Message-ID: <1420555701-24645-1-git-send-email-p.zabel@pengutronix.de> Return-path: Sender: linux-i2c-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Wolfram Sang Cc: linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Fugang Duan , Yao Yuan , Fabio Estevam , kernel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org, Philipp Zabel List-Id: linux-i2c@vger.kernel.org If the i2c device tree nodes don't contain the dmas and dma-names property, an error is displayed for each i2c device: of_dma_request_slave_channel: dma-names property of node '/soc/aips-bus@02100000/i2c@021a0000' missing or empty This patch avoids calling dma_request_slave_channel if the dma-names property does not exist in the device tree in the first place. Signed-off-by: Philipp Zabel --- drivers/i2c/busses/i2c-imx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 7f3a9fe..f0d9904 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -288,6 +288,9 @@ static void i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx, struct device *dev = &i2c_imx->adapter.dev; int ret; + if (!of_get_property(dev->of_node, "dma-names", NULL)) + return; + dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL); if (!dma) return; -- 2.1.4