From patchwork Thu Nov 29 06:03:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sasha Levin X-Patchwork-Id: 1005119 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="f39LXwYt"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4356XK2gtZz9s4s for ; Thu, 29 Nov 2018 17:08:33 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729978AbeK2RII (ORCPT ); Thu, 29 Nov 2018 12:08:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:46440 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728038AbeK2RIH (ORCPT ); Thu, 29 Nov 2018 12:08:07 -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 C75112086B; Thu, 29 Nov 2018 06:03:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543471435; bh=QNw5dJKq/1wapPHa6KqbeSH0zpryqjEVMrjRMBTpFuY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f39LXwYt2QMFaSN6bxbX63GBRNxHvDluMAzzOngDmEYh5vlO8PMPAxDvWX/xd836J YZWYzbweGFdkY+f02WecAKEznlVOoccJunXjdgK16FF6Je+t2nWBLMh10yCMriBCAu qxbsF+QueiacXbgk0w3WM/U3LkKZ3tV/WsMF0lMQ= 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 4.9 05/18] can: rcar_can: Fix erroneous registration Date: Thu, 29 Nov 2018 01:03:17 -0500 Message-Id: <20181129060331.160224-5-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181129060331.160224-1-sashal@kernel.org> References: <20181129060331.160224-1-sashal@kernel.org> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@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/rcar_can.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c index 788459f6bf5c..9b2c3bd00f8b 100644 --- a/drivers/net/can/rcar/rcar_can.c +++ b/drivers/net/can/rcar/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 @@ -789,7 +792,7 @@ 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;