From patchwork Wed Jan 24 10:35:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeffy Chen X-Patchwork-Id: 10182029 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id AF55E602B7 for ; Wed, 24 Jan 2018 10:36:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AF6BA287BA for ; Wed, 24 Jan 2018 10:36:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A3DF8288C3; Wed, 24 Jan 2018 10:36:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2CE2B287BA for ; Wed, 24 Jan 2018 10:36:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=4hmBNv00TnF25VhKuATeA12kRQBZmF1sXqtl9Ish89E=; b=WaM4j4KtkNkdTAo54PlaZ/zumf DgmfEJGNG1AaSGpke1cI1Ewq2Q3DZWiXf8rQbT/049hN00adKZUGTmwx4E3hfi0BkEFBWcONAW9J7 Pf8C/eHTiI482gylrF5McTacoAGh2g4or5UnHjVXS+9qKkn6suS2ELLiycTQxnW/K3wEmUfnT3wg2 qDzw/+3KTPAOVJ6ig1FVxP56N1c5JqLJpJpAvfutZSG4ZZ+bha5KilrJtf/VJybFlcrwaPqyADDdA l3e9zxtbCYEV82D8j0Af/GmQy0zXqxGxzbsTeWd8SoKU4xhuFKhtjXEZB5nTRLkSOovbb7ICtcTKz Edd1HISw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1eeIPt-0006b4-7I; Wed, 24 Jan 2018 10:36:29 +0000 Received: from regular1.263xmail.com ([211.150.99.138]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1eeIPH-0005wD-OQ; Wed, 24 Jan 2018 10:35:53 +0000 Received: from jeffy.chen?rock-chips.com (unknown [192.168.167.224]) by regular1.263xmail.com (Postfix) with ESMTP id 851A47997; Wed, 24 Jan 2018 18:35:35 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTPA id C2008308; Wed, 24 Jan 2018 18:35:33 +0800 (CST) X-RL-SENDER: jeffy.chen@rock-chips.com X-FST-TO: linux-kernel@vger.kernel.org X-SENDER-IP: 103.29.142.67 X-LOGIN-NAME: jeffy.chen@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-SENDER: cjf@rock-chips.com X-DNS-TYPE: 0 Received: from localhost (unknown [103.29.142.67]) by smtp.263.net (Postfix) whith ESMTP id 20162XN5LLC; Wed, 24 Jan 2018 18:35:36 +0800 (CST) From: Jeffy Chen To: linux-kernel@vger.kernel.org Subject: [PATCH v5 01/13] iommu/rockchip: Prohibit unbind and remove Date: Wed, 24 Jan 2018 18:35:04 +0800 Message-Id: <20180124103516.2571-2-jeffy.chen@rock-chips.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20180124103516.2571-1-jeffy.chen@rock-chips.com> References: <20180124103516.2571-1-jeffy.chen@rock-chips.com> X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xxm@rock-chips.com, Joerg Roedel , Jeffy Chen , tfiga@chromium.org, jcliang@chromium.org, linux-rockchip@lists.infradead.org, iommu@lists.linux-foundation.org, robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org, Heiko Stuebner MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Removal of IOMMUs cannot be done reliably. This is similar to exynos iommu driver. Signed-off-by: Jeffy Chen Reviewed-by: Tomasz Figa --- Changes in v5: None Changes in v4: Rewrite commit message. Changes in v3: Also remove remove() and module_exit() as Tomasz suggested. Changes in v2: None drivers/iommu/rockchip-iommu.c | 21 +-------------------- 1 file changed, 1 insertion(+), 20 deletions(-) diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index 9d991c2d8767..16cd8780c289 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -1197,18 +1197,6 @@ static int rk_iommu_probe(struct platform_device *pdev) return err; } -static int rk_iommu_remove(struct platform_device *pdev) -{ - struct rk_iommu *iommu = platform_get_drvdata(pdev); - - if (iommu) { - iommu_device_sysfs_remove(&iommu->iommu); - iommu_device_unregister(&iommu->iommu); - } - - return 0; -} - static const struct of_device_id rk_iommu_dt_ids[] = { { .compatible = "rockchip,iommu" }, { /* sentinel */ } @@ -1217,10 +1205,10 @@ MODULE_DEVICE_TABLE(of, rk_iommu_dt_ids); static struct platform_driver rk_iommu_driver = { .probe = rk_iommu_probe, - .remove = rk_iommu_remove, .driver = { .name = "rk_iommu", .of_match_table = rk_iommu_dt_ids, + .suppress_bind_attrs = true, }, }; @@ -1248,14 +1236,7 @@ static int __init rk_iommu_init(void) platform_driver_unregister(&rk_iommu_domain_driver); return ret; } -static void __exit rk_iommu_exit(void) -{ - platform_driver_unregister(&rk_iommu_driver); - platform_driver_unregister(&rk_iommu_domain_driver); -} - subsys_initcall(rk_iommu_init); -module_exit(rk_iommu_exit); MODULE_DESCRIPTION("IOMMU API for Rockchip"); MODULE_AUTHOR("Simon Xue and Daniel Kurtz ");