From patchwork Sat Mar 19 16:30:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laurent Pinchart X-Patchwork-Id: 12786207 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 2C122C4167D for ; Sat, 19 Mar 2022 16:31:42 +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=5TGBKcY8pXHASpveJPkGsKcMT8vHrlCQV+XebGaM4IQ=; b=FQsLwZjoUsR9bx qBaJ0YsK+QIJUR1q2pNKD/aaK4B0pAMzkenPyR6QBaTEW/cMvfJaNvZUKgEC3m57HkAgxzmEbkhI1 FAyV2A7P6oVdiYlGeDA3NjP+QlQ4kypdsJFyDl2qd/UlxafIOq0CYP2aLMq9u9YEOIaoX6/VNpURg apSYhlaml2dyXWaSFu2GOMZ/rjFEwJyF3em27twIDq+cC+rLxn6IDzHCrq2PKuYTvJs1XhH9bB5NC wKSRs3PPDHKAq2p0Yx3gbmJ33Bl6fq8tcHAgcnDTLRIj7BC1stK9rfTC5j319xMAhhf/htehna9lX oe+9pWMKMXpcTJi8YiLA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nVbzO-0042oP-90; Sat, 19 Mar 2022 16:31:38 +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 1nVbzH-0042jC-1S for linux-rockchip@lists.infradead.org; Sat, 19 Mar 2022 16:31:33 +0000 Received: from pendragon.lan (62-78-145-57.bb.dnainternet.fi [62.78.145.57]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 3AB742A35; Sat, 19 Mar 2022 17:31:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1647707487; bh=qndOZ49rx5xr4fCumtbp33uFoQv3KFvDr2L2UUIs5YI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SgtiLxxxfEXdkwbOMFHR5sK0L0t67ZmZAW6AruOkC0Aj4wiD+SjZuVkYm2BL+e1jX 28Php1pjPW9bgSZYQQtS3rF/8GMLRJuj7kHBgmSZGoZeoPvxf+GFAT3sTrxqVszIuK dPY0G0Q0NRbP+OSTU31Idx8kqxexgxD20CiR+/6A= 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 04/17] media: rkisp1: resizer: Fix and simplify (un)registration Date: Sat, 19 Mar 2022 18:30:47 +0200 Message-Id: <20220319163100.3083-5-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220319_093131_274221_C8A879A4 X-CRM114-Status: GOOD ( 14.04 ) 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_rsz_register() and rkisp1_rsz_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_rsz_unregister() and rkisp1_resizer_devs_unregister() safe to be called on an unregistered resizer subdev to prepare for simplification of error handling at probe time. Signed-off-by: Laurent Pinchart Reviewed-by: Dafna Hirschfeld --- .../platform/rockchip/rkisp1/rkisp1-resizer.c | 34 +++++++++---------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c index 2070f4b06705..df2beee1be99 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c @@ -782,8 +782,12 @@ static const struct v4l2_subdev_ops rkisp1_rsz_ops = { static void rkisp1_rsz_unregister(struct rkisp1_resizer *rsz) { + if (!rsz->rkisp1) + return; + v4l2_device_unregister_subdev(&rsz->sd); media_entity_cleanup(&rsz->sd.entity); + mutex_destroy(&rsz->ops_lock); } static int rkisp1_rsz_register(struct rkisp1_resizer *rsz) @@ -821,47 +825,43 @@ static int rkisp1_rsz_register(struct rkisp1_resizer *rsz) mutex_init(&rsz->ops_lock); ret = media_entity_pads_init(&sd->entity, RKISP1_RSZ_PAD_MAX, pads); if (ret) - return ret; + goto error; ret = v4l2_device_register_subdev(&rsz->rkisp1->v4l2_dev, sd); if (ret) { dev_err(sd->dev, "Failed to register resizer subdev\n"); - goto err_cleanup_media_entity; + goto error; } rkisp1_rsz_init_config(sd, &state); return 0; -err_cleanup_media_entity: +error: media_entity_cleanup(&sd->entity); - + mutex_destroy(&rsz->ops_lock); return ret; } int rkisp1_resizer_devs_register(struct rkisp1_device *rkisp1) { - struct rkisp1_resizer *rsz; - unsigned int i, j; + unsigned int i; int ret; for (i = 0; i < ARRAY_SIZE(rkisp1->resizer_devs); i++) { - rsz = &rkisp1->resizer_devs[i]; + struct rkisp1_resizer *rsz = &rkisp1->resizer_devs[i]; + rsz->rkisp1 = rkisp1; rsz->id = i; + ret = rkisp1_rsz_register(rsz); - if (ret) - goto err_unreg_resizer_devs; + if (ret) { + rsz->rkisp1 = NULL; + rkisp1_resizer_devs_unregister(rkisp1); + return ret; + } } return 0; - -err_unreg_resizer_devs: - for (j = 0; j < i; j++) { - rsz = &rkisp1->resizer_devs[j]; - rkisp1_rsz_unregister(rsz); - } - - return ret; } void rkisp1_resizer_devs_unregister(struct rkisp1_device *rkisp1)