From patchwork Fri Mar 4 17:19:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 12769500 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 11CE7C433F5 for ; Fri, 4 Mar 2022 17:22:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=TaKA2DRTDGkhn5yyZQbt/Yk5EgdZ9Mp+0E/Zi+UkEUo=; b=nkpbwd19OGo9tf Kl7ohns8hY6bt7QXAhevly7dcH55CdgKoDYkH2sCRgEF0QK1szmrIovcB/67vxqS5NB0rTWmG9ZVB 93mPpkCePzf7/235Xsx+ouzZg/SkgJfFk+Zq/aJUZAW2pkRiL/lHD7mcWMRXDpYArjywal3TPjg1x cqhbp92yKVnHHbebp60b+RBm8JNamASpKR5/wGYar+l3jZORWS/29aWloUmgmnxRNNEia0WpPU9vf g/4M4zc1N/PNgBqW29xKGJulDIxF3fqh4UG7hmuO3xNTcUSpcZw0Q4DkXfC7WrHDkS/9V/DP7LJtJ auVTUjnzK7Wt8UvAfIsQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nQBdJ-00BHIn-Un; Fri, 04 Mar 2022 17:22:26 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nQBah-00BFbJ-R8 for linux-rockchip@lists.infradead.org; Fri, 04 Mar 2022 17:19:46 +0000 Received: from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id E810E1839; Fri, 4 Mar 2022 18:19:41 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1646414382; bh=/LmIQlC+c3ad+EAdWkMLrd0DBeGe4XJjo0Jv6pxvnEA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aX87QQZOTPFpgmVc710ZHoVkYj1lAUJ5i7TN2B/eqTLqtKttVi1Z/DMqC1uVlzXt0 NYccOQuy6RVVxNwi7KAM4a1hTt0kePQnXRUpUqIsvUPYvm5LUI6xJP4YDfSCni/oGb Pucy0CjhYrQyZULThjoXXcEmgKqSBtbrqsJaC9mI= 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 v2 02/17] media: rkisp1: capture: Fix and simplify (un)registration Date: Fri, 4 Mar 2022 19:19:10 +0200 Message-Id: <20220304171925.1592-3-laurent.pinchart@ideasonboard.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220304171925.1592-1-laurent.pinchart@ideasonboard.com> References: <20220304171925.1592-1-laurent.pinchart@ideasonboard.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220304_091944_097118_5C191CFC X-CRM114-Status: GOOD ( 13.95 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org The rkisp1_register_capture() and rkisp1_unregister_capture() functions don't destroy the mutex (in the error path for the former). Fix this and make rkisp1_unregister_capture() and rkisp1_capture_devs_unregister() safe to be called on an unregistered capture node to prepare for simplification of error handling at probe time. Signed-off-by: Laurent Pinchart --- Changes since v1: - Reset cap->rkisp1 in rkisp1_capture_devs_register() --- .../platform/rockchip/rkisp1/rkisp1-capture.c | 26 ++++++++++--------- 1 file changed, 14 insertions(+), 12 deletions(-) diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c index 9c11f2b8e5f5..96a7e6c0a622 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c @@ -1312,8 +1312,12 @@ static const struct v4l2_file_operations rkisp1_fops = { static void rkisp1_unregister_capture(struct rkisp1_capture *cap) { + if (!cap->rkisp1) + return; + media_entity_cleanup(&cap->vnode.vdev.entity); vb2_video_unregister_device(&cap->vnode.vdev); + mutex_destroy(&cap->vnode.vlock); } void rkisp1_capture_devs_unregister(struct rkisp1_device *rkisp1) @@ -1390,6 +1394,7 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap) error: media_entity_cleanup(&vdev->entity); + mutex_destroy(&node->vlock); return ret; } @@ -1425,26 +1430,23 @@ rkisp1_capture_init(struct rkisp1_device *rkisp1, enum rkisp1_stream_id id) int rkisp1_capture_devs_register(struct rkisp1_device *rkisp1) { - struct rkisp1_capture *cap; - unsigned int i, j; + unsigned int i; int ret; for (i = 0; i < ARRAY_SIZE(rkisp1->capture_devs); i++) { + struct rkisp1_capture *cap = &rkisp1->capture_devs[i]; + rkisp1_capture_init(rkisp1, i); - cap = &rkisp1->capture_devs[i]; cap->rkisp1 = rkisp1; + ret = rkisp1_register_capture(cap); - if (ret) - goto err_unreg_capture_devs; + if (ret) { + cap->rkisp1 = NULL; + rkisp1_capture_devs_unregister(rkisp1); + return ret; + } } return 0; -err_unreg_capture_devs: - for (j = 0; j < i; j++) { - cap = &rkisp1->capture_devs[j]; - rkisp1_unregister_capture(cap); - } - - return ret; }