From patchwork Sat Mar 19 16:30:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 553138 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 487C7C433EF for ; Sat, 19 Mar 2022 16:31:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243644AbiCSQcx (ORCPT ); Sat, 19 Mar 2022 12:32:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35888 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243638AbiCSQcu (ORCPT ); Sat, 19 Mar 2022 12:32:50 -0400 Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [IPv6:2001:4b98:dc2:55:216:3eff:fef7:d647]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8BB423F9CD for ; Sat, 19 Mar 2022 09:31:29 -0700 (PDT) Received: from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 79D0126E2; Sat, 19 Mar 2022 17:31:26 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1647707487; bh=TZYcik4dG+rSsCkPCQkOBQpcllM4Z18+HB9vK0XUl5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qrlFXGDK0VWGQQdHhcvdERYfG7ms6xhtHdDJSopcYm/CjV1lUi275VOBUbU5s7Jfn mQSCaM4wzW1/qVIdKYgqvy1QJvbsEVLEsiH/+n4i6WJyVhrytyhWeb/C8zncSo4kxe mf0426RB1mO7U6JN4l9LYnXdnz/bIGGQroZmKPkY= From: Laurent Pinchart To: linux-media@vger.kernel.org Cc: Dafna Hirschfeld , Heiko Stuebner , Paul Elder , Tomasz Figa , linux-rockchip@lists.infradead.org Subject: [PATCH v3 03/17] media: rkisp1: isp: Fix and simplify (un)registration Date: Sat, 19 Mar 2022 18:30:46 +0200 Message-Id: <20220319163100.3083-4-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220319163100.3083-1-laurent.pinchart@ideasonboard.com> References: <20220319163100.3083-1-laurent.pinchart@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The rkisp1_isp_register() and rkisp1_isp_unregister() functions don't destroy the mutex (in the error path for the former). Fix this, simplify error handling at registration time as media_entity_cleanup() can be called on an uninitialized entity, and make rkisp1_isp_unregister() and safe to be called on an unregistered isp subdev to prepare for simplification of error handling at probe time. Signed-off-by: Laurent Pinchart --- .../platform/rockchip/rkisp1/rkisp1-isp.c | 20 ++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c index 2a35bf24e54e..f84e53b60ee1 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c @@ -1090,29 +1090,35 @@ int rkisp1_isp_register(struct rkisp1_device *rkisp1) mutex_init(&isp->ops_lock); ret = media_entity_pads_init(&sd->entity, RKISP1_ISP_PAD_MAX, pads); if (ret) - return ret; + goto error; ret = v4l2_device_register_subdev(&rkisp1->v4l2_dev, sd); if (ret) { dev_err(rkisp1->dev, "Failed to register isp subdev\n"); - goto err_cleanup_media_entity; + goto error; } rkisp1_isp_init_config(sd, &state); + return 0; -err_cleanup_media_entity: +error: media_entity_cleanup(&sd->entity); - + mutex_destroy(&isp->ops_lock); + isp->sd.flags = 0; return ret; } void rkisp1_isp_unregister(struct rkisp1_device *rkisp1) { - struct v4l2_subdev *sd = &rkisp1->isp.sd; + struct rkisp1_isp *isp = &rkisp1->isp; - v4l2_device_unregister_subdev(sd); - media_entity_cleanup(&sd->entity); + if (!isp->sd.flags) + return; + + v4l2_device_unregister_subdev(&isp->sd); + media_entity_cleanup(&isp->sd.entity); + mutex_destroy(&isp->ops_lock); } /* ----------------------------------------------------------------------------