From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 340ABC432C0 for ; Tue, 19 Nov 2019 05:43:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 047EC208C3 for ; Tue, 19 Nov 2019 05:43:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574142196; bh=H7Djb+n3qjxbE2dVJgW6kUOuIo0sOoojYsnEGEwGFNE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tPXquGugz6q0/1zMs64GxYTI9aYr5yUwSeh8HgAOBPKlKVyOz0DtGU3NDtEdB1YI8 Luoy93Q51yKxzdFyMqfTK88Yf6X+jGUJqHv2usvkkkJoGSHhMsi30NHeXOhgyb8vna +Kb1ZclweyFYc1LolkAQteoqpa70zgBdjNeWkbg8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730112AbfKSFnO (ORCPT ); Tue, 19 Nov 2019 00:43:14 -0500 Received: from mail.kernel.org ([198.145.29.99]:37934 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730477AbfKSFnJ (ORCPT ); Tue, 19 Nov 2019 00:43:09 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D3F6021783; Tue, 19 Nov 2019 05:43:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574142188; bh=H7Djb+n3qjxbE2dVJgW6kUOuIo0sOoojYsnEGEwGFNE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hrt6b5X5bLf8QEOHXkhqIgWg3gkYInukgtxbShITANVUjqkS6+K1rADunt62MErpB AsPxeXS99ThsXO6McXUEz5nv2DkBJ0FlsGny2FctMditcy/6wfOd3oCCBTsqH0UIL/ Qf8T6zM4KT9bZ/vjTnGtItZSnxrRm04z++N6JciY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Rui Miguel Silva , Sakari Ailus , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.19 419/422] media: ov2680: fix null dereference at power on Date: Tue, 19 Nov 2019 06:20:16 +0100 Message-Id: <20191119051426.345896171@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191119051400.261610025@linuxfoundation.org> References: <20191119051400.261610025@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rui Miguel Silva [ Upstream commit c45fbdf24c61a7b7a37f1b3bbd46f054637a3627 ] Swapping the order between v4l2 subdevice registration and checking chip id in b7a417628abf ("media: ov2680: don't register the v4l2 subdevice before checking chip ID") makes the mode restore to use the sensor controls before they are set, so move the mode restore call to s_power after the handler setup for controls is done. This remove also the need for the error code path in power on function. Fixes: b7a417628abf ("media: ov2680: don't register the v4l2 subdevice before checking chip ID") Signed-off-by: Rui Miguel Silva Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/i2c/ov2680.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c index 3ccd584568fb5..d8798fb714ba8 100644 --- a/drivers/media/i2c/ov2680.c +++ b/drivers/media/i2c/ov2680.c @@ -568,10 +568,6 @@ static int ov2680_power_on(struct ov2680_dev *sensor) if (ret < 0) return ret; - ret = ov2680_mode_restore(sensor); - if (ret < 0) - goto disable; - sensor->is_enabled = true; /* Set clock lane into LP-11 state */ @@ -580,12 +576,6 @@ static int ov2680_power_on(struct ov2680_dev *sensor) ov2680_stream_disable(sensor); return 0; - -disable: - dev_err(dev, "failed to enable sensor: %d\n", ret); - ov2680_power_off(sensor); - - return ret; } static int ov2680_s_power(struct v4l2_subdev *sd, int on) @@ -606,6 +596,8 @@ static int ov2680_s_power(struct v4l2_subdev *sd, int on) ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler); if (ret < 0) return ret; + + ret = ov2680_mode_restore(sensor); } return ret; -- 2.20.1