From patchwork Wed Sep 8 13:03:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Tretter X-Patchwork-Id: 12481107 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 10372C4332F for ; Wed, 8 Sep 2021 13:03:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E86B161163 for ; Wed, 8 Sep 2021 13:03:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231143AbhIHNEa (ORCPT ); Wed, 8 Sep 2021 09:04:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235230AbhIHNE0 (ORCPT ); Wed, 8 Sep 2021 09:04:26 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54B8EC061575 for ; Wed, 8 Sep 2021 06:03:18 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mNxES-0004mI-LB; Wed, 08 Sep 2021 15:03:16 +0200 Received: from [2a0a:edc0:0:1101:1d::39] (helo=dude03.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1mNxER-0004SA-ME; Wed, 08 Sep 2021 15:03:15 +0200 Received: from mtr by dude03.red.stw.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1mNxER-00DpG5-LO; Wed, 08 Sep 2021 15:03:15 +0200 From: Michael Tretter To: linux-media@vger.kernel.org, mchehab@kernel.org, hverkuil-cisco@xs4all.nl Cc: kernel@pengutronix.de, m.tretter@pengutronix.de Subject: [PATCH 2/6] media: allegro: fix module removal if initialization failed Date: Wed, 8 Sep 2021 15:03:11 +0200 Message-Id: <20210908130315.3295253-3-m.tretter@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210908130315.3295253-1-m.tretter@pengutronix.de> References: <20210908130315.3295253-1-m.tretter@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mtr@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-media@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org If the module probe finished, but the firmware initialization failed, removing the module must not revert the firmware initialization. Add a field to track the status of the firmware initialization and only roll it back, if the firmware was successfully initialized. Signed-off-by: Michael Tretter --- .../media/platform/allegro-dvt/allegro-core.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/media/platform/allegro-dvt/allegro-core.c b/drivers/media/platform/allegro-dvt/allegro-core.c index 14a119b43bca..89d6de6082f6 100644 --- a/drivers/media/platform/allegro-dvt/allegro-core.c +++ b/drivers/media/platform/allegro-dvt/allegro-core.c @@ -142,6 +142,7 @@ struct allegro_dev { struct allegro_buffer suballocator; struct completion init_complete; + bool initialized; /* The mailbox interface */ struct allegro_mbox *mbox_command; @@ -3632,6 +3633,8 @@ static void allegro_fw_callback(const struct firmware *fw, void *context) "allegro codec registered as /dev/video%d\n", dev->video_dev.num); + dev->initialized = true; + release_firmware(fw_codec); release_firmware(fw); @@ -3678,6 +3681,8 @@ static int allegro_probe(struct platform_device *pdev) mutex_init(&dev->lock); + dev->initialized = false; + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs"); if (!res) { dev_err(&pdev->dev, @@ -3748,11 +3753,13 @@ static int allegro_remove(struct platform_device *pdev) { struct allegro_dev *dev = platform_get_drvdata(pdev); - video_unregister_device(&dev->video_dev); - if (dev->m2m_dev) - v4l2_m2m_release(dev->m2m_dev); - allegro_mcu_hw_deinit(dev); - allegro_free_fw_codec(dev); + if (dev->initialized) { + video_unregister_device(&dev->video_dev); + if (dev->m2m_dev) + v4l2_m2m_release(dev->m2m_dev); + allegro_mcu_hw_deinit(dev); + allegro_free_fw_codec(dev); + } v4l2_device_unregister(&dev->v4l2_dev);