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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 DE2EBC43603 for ; Wed, 11 Dec 2019 09:27:20 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A7BE62077B for ; Wed, 11 Dec 2019 09:27:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dw7nNw4a" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A7BE62077B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nxp.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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=FmqbJcEAt5Rx9j7X6PHpOCubyX6mW54a3im373ydKzA=; b=dw7nNw4a5oUslVinJMAQAuTcM9 P8wVoI+sLKi5/ictbdgLLAiYJ8Zx4pjlPqMg+VqNkV4zUvzUL8JcjIhrWTbf82OVXtiyKoVwOGPXN sCTEwrRaS+FvxnFxPWcpFfyLygk457cNUUez2b99NANLWERhcu0r70W5HCJwA3i6gvCMJWUTSuGG8 hsXQyMCM62eGdrPEiQkC37E6iGhfi4Z4fgXqxuxSfvQMG9Ttxx8m5oMGJ+hvyRrNehAiDGDcDAk6c u74DMk2qZxxnttCaYcQUu+i9UELqaUsu0JNbYAQ1+cpP0LNEAsVaE3S0uKYd/JsdttNNmAQfaoKzN HqiVOOcA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ieyH3-0008Dn-3s; Wed, 11 Dec 2019 09:27:13 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ieyFz-0007Dq-5V for linux-arm-kernel@lists.infradead.org; Wed, 11 Dec 2019 09:26:10 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id B092D1A05EB; Wed, 11 Dec 2019 10:26:02 +0100 (CET) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id A29721A0C28; Wed, 11 Dec 2019 10:26:02 +0100 (CET) Received: from fsr-ub1664-175.ea.freescale.net (fsr-ub1664-175.ea.freescale.net [10.171.82.40]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 29E1920568; Wed, 11 Dec 2019 10:26:02 +0100 (CET) From: Abel Vesa To: Shawn Guo , Stephen Boyd , Sascha Hauer Subject: [RESEND v2 01/11] clk: imx: Add correct failure handling for clk based helpers Date: Wed, 11 Dec 2019 11:25:40 +0200 Message-Id: <1576056350-20715-2-git-send-email-abel.vesa@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1576056350-20715-1-git-send-email-abel.vesa@nxp.com> References: <1576056350-20715-1-git-send-email-abel.vesa@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191211_012607_479268_5E9736D6 X-CRM114-Status: UNSURE ( 8.21 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dong Aisheng , Peng Fan , Jacky Bai , Linux Kernel Mailing List , NXP Linux Team , Leonard Crestez , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Abel Vesa MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org If the clk_hw based API returns an error, trying to return the clk from hw will end up in a NULL pointer dereference. So adding the to_clk checker and using it inside every clk based macro helper we handle that case correctly. This to_clk is also temporary and will go away along with the clk based macro helpers once there is no user that need them anymore. Signed-off-by: Abel Vesa --- drivers/clk/imx/clk.h | 37 ++++++++++++++++++++++--------------- 1 file changed, 22 insertions(+), 15 deletions(-) diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h index 81122c9..00ec481 100644 --- a/drivers/clk/imx/clk.h +++ b/drivers/clk/imx/clk.h @@ -55,48 +55,48 @@ extern struct imx_pll14xx_clk imx_1443x_pll; extern struct imx_pll14xx_clk imx_1443x_dram_pll; #define imx_clk_cpu(name, parent_name, div, mux, pll, step) \ - imx_clk_hw_cpu(name, parent_name, div, mux, pll, step)->clk + to_clk(imx_clk_hw_cpu(name, parent_name, div, mux, pll, step)) #define clk_register_gate2(dev, name, parent_name, flags, reg, bit_idx, \ cgr_val, clk_gate_flags, lock, share_count) \ - clk_hw_register_gate2(dev, name, parent_name, flags, reg, bit_idx, \ - cgr_val, clk_gate_flags, lock, share_count)->clk + to_clk(clk_hw_register_gate2(dev, name, parent_name, flags, reg, bit_idx, \ + cgr_val, clk_gate_flags, lock, share_count)) #define imx_clk_pllv3(type, name, parent_name, base, div_mask) \ - imx_clk_hw_pllv3(type, name, parent_name, base, div_mask)->clk + to_clk(imx_clk_hw_pllv3(type, name, parent_name, base, div_mask)) #define imx_clk_pfd(name, parent_name, reg, idx) \ - imx_clk_hw_pfd(name, parent_name, reg, idx)->clk + to_clk(imx_clk_hw_pfd(name, parent_name, reg, idx)) #define imx_clk_gate_exclusive(name, parent, reg, shift, exclusive_mask) \ - imx_clk_hw_gate_exclusive(name, parent, reg, shift, exclusive_mask)->clk + to_clk(imx_clk_hw_gate_exclusive(name, parent, reg, shift, exclusive_mask)) #define imx_clk_fixed_factor(name, parent, mult, div) \ - imx_clk_hw_fixed_factor(name, parent, mult, div)->clk + to_clk(imx_clk_hw_fixed_factor(name, parent, mult, div)) #define imx_clk_divider2(name, parent, reg, shift, width) \ - imx_clk_hw_divider2(name, parent, reg, shift, width)->clk + to_clk(imx_clk_hw_divider2(name, parent, reg, shift, width)) #define imx_clk_gate_dis(name, parent, reg, shift) \ - imx_clk_hw_gate_dis(name, parent, reg, shift)->clk + to_clk(imx_clk_hw_gate_dis(name, parent, reg, shift)) #define imx_clk_gate2(name, parent, reg, shift) \ - imx_clk_hw_gate2(name, parent, reg, shift)->clk + to_clk(imx_clk_hw_gate2(name, parent, reg, shift)) #define imx_clk_gate2_flags(name, parent, reg, shift, flags) \ - imx_clk_hw_gate2_flags(name, parent, reg, shift, flags)->clk + to_clk(imx_clk_hw_gate2_flags(name, parent, reg, shift, flags)) #define imx_clk_gate2_shared2(name, parent, reg, shift, share_count) \ - imx_clk_hw_gate2_shared2(name, parent, reg, shift, share_count)->clk + to_clk(imx_clk_hw_gate2_shared2(name, parent, reg, shift, share_count)) #define imx_clk_gate3(name, parent, reg, shift) \ - imx_clk_hw_gate3(name, parent, reg, shift)->clk + to_clk(imx_clk_hw_gate3(name, parent, reg, shift)) #define imx_clk_gate4(name, parent, reg, shift) \ - imx_clk_hw_gate4(name, parent, reg, shift)->clk + to_clk(imx_clk_hw_gate4(name, parent, reg, shift)) #define imx_clk_mux(name, reg, shift, width, parents, num_parents) \ - imx_clk_hw_mux(name, reg, shift, width, parents, num_parents)->clk + to_clk(imx_clk_hw_mux(name, reg, shift, width, parents, num_parents)) struct clk *imx_clk_pll14xx(const char *name, const char *parent_name, void __iomem *base, const struct imx_pll14xx_clk *pll_clk); @@ -199,6 +199,13 @@ struct clk_hw *imx_clk_hw_fixup_mux(const char *name, void __iomem *reg, u8 shift, u8 width, const char * const *parents, int num_parents, void (*fixup)(u32 *val)); +static inline struct clk *to_clk(struct clk_hw *hw) +{ + if (IS_ERR_OR_NULL(hw)) + return ERR_CAST(hw); + return hw->clk; +} + static inline struct clk *imx_clk_fixed(const char *name, int rate) { return clk_register_fixed_rate(NULL, name, NULL, 0, rate); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel