From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 766E1C43441 for ; Thu, 29 Nov 2018 06:05:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D8342086B for ; Thu, 29 Nov 2018 06:05:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Z7sDIrNY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3D8342086B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730452AbeK2RJ6 (ORCPT ); Thu, 29 Nov 2018 12:09:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:50200 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727695AbeK2RJ4 (ORCPT ); Thu, 29 Nov 2018 12:09:56 -0500 Received: from sasha-vm.mshome.net (unknown [37.142.5.207]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 18C9220868; Thu, 29 Nov 2018 06:05:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543471544; bh=jAD7j+8cjizOB/ele494X0FCYMBOXEotxTN9mlV/y6w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z7sDIrNY0DfqNr8PyyWACDscx/v5zPSj21leU/IQHcWtNoklgMkUYjBpumSNyVhs1 EOf+U6jtk2ZlYbI8zKwRwH3Mfo0FQzZZqDxVjHC5NVqZSTeA+Pnd+ovsxhipRwrY0B y+hU+YrZyeR/fffViF4LHhPykYpaP5I94kePG0tQ= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Fabrizio Castro , Chris Paterson , Marc Kleine-Budde , Sasha Levin , linux-can@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 3.18 2/6] can: rcar_can: Fix erroneous registration Date: Thu, 29 Nov 2018 01:05:31 -0500 Message-Id: <20181129060535.160592-2-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181129060535.160592-1-sashal@kernel.org> References: <20181129060535.160592-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fabrizio Castro [ Upstream commit 68c8d209cd4337da4fa04c672f0b62bb735969bc ] Assigning 2 to "renesas,can-clock-select" tricks the driver into registering the CAN interface, even though we don't want that. This patch improves one of the checks to prevent that from happening. Fixes: 862e2b6af9413b43 ("can: rcar_can: support all input clocks") Signed-off-by: Fabrizio Castro Signed-off-by: Chris Paterson Reviewed-by: Simon Horman Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin --- drivers/net/can/rcar_can.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/rcar_can.c b/drivers/net/can/rcar_can.c index 9718248e55f1..16144e7d0c8f 100644 --- a/drivers/net/can/rcar_can.c +++ b/drivers/net/can/rcar_can.c @@ -24,6 +24,9 @@ #define RCAR_CAN_DRV_NAME "rcar_can" +#define RCAR_SUPPORTED_CLOCKS (BIT(CLKR_CLKP1) | BIT(CLKR_CLKP2) | \ + BIT(CLKR_CLKEXT)) + /* Mailbox configuration: * mailbox 60 - 63 - Rx FIFO mailboxes * mailbox 56 - 59 - Tx FIFO mailboxes @@ -785,7 +788,7 @@ static int rcar_can_probe(struct platform_device *pdev) goto fail_clk; } - if (clock_select >= ARRAY_SIZE(clock_names)) { + if (!(BIT(clock_select) & RCAR_SUPPORTED_CLOCKS)) { err = -EINVAL; dev_err(&pdev->dev, "invalid CAN clock selected\n"); goto fail_clk; -- 2.17.1