Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752101AbaKKMwS (ORCPT ); Tue, 11 Nov 2014 07:52:18 -0500 Received: from regular1.263xmail.com ([211.150.99.133]:57852 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751422AbaKKMwQ (ORCPT ); Tue, 11 Nov 2014 07:52:16 -0500 X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-RL-SENDER: andy.yan@rock-chips.com X-FST-TO: airlied@linux.ie X-SENDER-IP: 127.0.0.1 X-LOGIN-NAME: andy.yan@rock-chips.com X-UNIQUE-TAG: <7569b6a008b2785ebe92088b14eb2237> X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 From: Andy Yan To: airlied@linux.ie, heiko@sntech.de, fabio.estevam@freescale.com, rmk+kernel@arm.linux.org.uk Cc: Greg Kroah-Hartman , Grant Likely , Rob Herring , Philipp Zabel , Shawn Guo , Andy yan , Josh Boyer , Sean Paul , Inki Dae , Dave Airlie , Arnd Bergmann , Lucas Stach , Zubair.Kakakhel@imgtec.com, djkurtz@google.com, ykk@rock-chips.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, devel@driverdev.osuosl.org, devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org, jay.xu@rock-chips.com Subject: [PATCH v7 2/7] staging: imx-drm: imx-hdmi: return defer if can't get ddc i2c adapter Date: Tue, 11 Nov 2014 20:51:51 +0800 Message-Id: <1415710311-11983-1-git-send-email-andy.yan@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1415710229-11935-1-git-send-email-andy.yan@rock-chips.com> References: <1415710229-11935-1-git-send-email-andy.yan@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org drm driver may probe before the i2c bus, so the driver should defer probing until it is available Signed-off-by: Andy Yan --- Changes in v7: None Changes in v6: None Changes in v5: None Changes in v4: - defer probe ddc i2c adapter Changes in v3: None Changes in v2: None drivers/staging/imx-drm/imx-hdmi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/staging/imx-drm/imx-hdmi.c b/drivers/staging/imx-drm/imx-hdmi.c index 79daec4..c2b035a 100644 --- a/drivers/staging/imx-drm/imx-hdmi.c +++ b/drivers/staging/imx-drm/imx-hdmi.c @@ -1611,8 +1611,11 @@ static int imx_hdmi_bind(struct device *dev, struct device *master, void *data) ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0); if (ddc_node) { hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node); - if (!hdmi->ddc) + if (!hdmi->ddc) { dev_dbg(hdmi->dev, "failed to read ddc node\n"); + of_node_put(ddc_node); + return -EPROBE_DEFER; + } of_node_put(ddc_node); } else { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/