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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A5B43C433F5 for ; Sat, 22 Jan 2022 09:34:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MnEXqm6Z6m0jY1TWvDNIM1QzXnTOqUOC21RFOmJrGOA=; b=m/Oxou5K/LqiGV L8HMZMMzkdpZePiEsDXOi63QM67DNcrAcpisLhoC+DF47gilBQIObvhY1xHVQqLHWWbfsL9cRt5LZ eRaNFnhmMEREOyKO/NZsWIDuLr1ZhQ8HAeM0K1M31vTMBrVvHJgsx0SUmDaEDZMQvIpme9cQ8BhyM LIm2qq6rwwWa2BZOIa9ayaD8IIYwsmTRrR+3Vd4wfjPIMiq7Vsc6pRLoBs2JCYYZauwNGBU0L9rOi qDVCLTlwawiZ0ps22GlmDkO0QoJrGRo6PvQvWebn3+ZhK8rhjRWCJWjxAvg0h+X0XuQEHK/0VzPBs tMpGd0B7L2OpLCfsEDaw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nBCn1-00GyUk-4U; Sat, 22 Jan 2022 09:34:31 +0000 Received: from mail-pg1-x52e.google.com ([2607:f8b0:4864:20::52e]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nBCXg-00Grrt-Le for linux-mediatek@lists.infradead.org; Sat, 22 Jan 2022 09:18:42 +0000 Received: by mail-pg1-x52e.google.com with SMTP id q75so10262620pgq.5 for ; Sat, 22 Jan 2022 01:18:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=eaTeWNEgjqwSs85dnefGHTIT7+UhSwDVAnPu0tdvvQE=; b=PRKpymQV7xWUkT5i0Ifjesb20aljfmowZM4+SjVfERsyMOTucgZNAUD9YO7ar8zJfr d1WarJMewlgGgzEyuoKB/jwrxIOHkjlYILVfH25V+Psn2PnnJ4re0cugZPIspYaWN82h YROLc5AQFk+7TBATAuWCjd8/uH4WAnKtYdXk4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=eaTeWNEgjqwSs85dnefGHTIT7+UhSwDVAnPu0tdvvQE=; b=c54xour//I30BWBgYvIOVldtQ508AYZ6LIVlw2YTw1T4Ai/W9tec43/z8+QjoJhgon QHxvMVgWEMc6zNwbMf0j1fScv53JEjp1f8QEExailD+iebWFCOBIzO5uN+0Izce92VjO aqPW+WOB6lGfIWitTrowDgNNH2UaLhXEWHBcD9HG/5LfnTZy766ou7GGCs4MLaJ5yv8p tzXf6OTOLrJBnMLvrIRWAVVx70hYDx3Q/Ox81t37oztjVgul7sl1kH54TYht6l7y4ate Vt56/2Tq3+lsaWwB7PTNCSn+TNxRMSZqtKYZwpVZMKYyDl5fPlUsqF9cgtzg8pn8Dyeu 8NWQ== X-Gm-Message-State: AOAM531QzvzLyFf1CK+DYDt11jO1Aj16qBzQOCN8/DDjtoyU6TwFoofL SE4Fc/mGR7t5vOGEkKB9c4FqlQ== X-Google-Smtp-Source: ABdhPJwRjgaufhTqOLp2a5KJoAsvUWYZrG3/EkFjCr5zSjeJlit/D9oY598PALMqVYEQeylLybPljA== X-Received: by 2002:a65:610b:: with SMTP id z11mr5646889pgu.205.1642843120168; Sat, 22 Jan 2022 01:18:40 -0800 (PST) Received: from wenstp920.tpe.corp.google.com ([2401:fa00:1:10:349f:9373:45d9:eb26]) by smtp.gmail.com with ESMTPSA id s1sm1608100pjn.42.2022.01.22.01.18.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 22 Jan 2022 01:18:39 -0800 (PST) From: Chen-Yu Tsai To: Stephen Boyd , Michael Turquette , Matthias Brugger Cc: Chen-Yu Tsai , Chun-Jie Chen , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 25/31] clk: mediatek: pll: Implement error handling in register API Date: Sat, 22 Jan 2022 17:17:25 +0800 Message-Id: <20220122091731.283592-26-wenst@chromium.org> X-Mailer: git-send-email 2.35.0.rc0.227.g00780c9af4-goog In-Reply-To: <20220122091731.283592-1-wenst@chromium.org> References: <20220122091731.283592-1-wenst@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220122_011840_778517_E7D98875 X-CRM114-Status: GOOD ( 14.51 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org The pll clk type registration function does not stop or return errors if any clk failed to be registered, nor does it implement an error handling path. This may result in a partially working device if any step failed. Make the register function return proper error codes, and bail out if errors occur. Proper cleanup, i.e. unregister any clks that were successfully registered, and unmap the I/O space, is done in the new error path. Signed-off-by: Chen-Yu Tsai --- drivers/clk/mediatek/clk-pll.c | 23 +++++++++++++++++++---- drivers/clk/mediatek/clk-pll.h | 6 +++--- 2 files changed, 22 insertions(+), 7 deletions(-) diff --git a/drivers/clk/mediatek/clk-pll.c b/drivers/clk/mediatek/clk-pll.c index 9698d1c97cd6..1dd15f560659 100644 --- a/drivers/clk/mediatek/clk-pll.c +++ b/drivers/clk/mediatek/clk-pll.c @@ -369,8 +369,9 @@ static void mtk_clk_unregister_pll(struct clk *clk) kfree(pll); } -void mtk_clk_register_plls(struct device_node *node, - const struct mtk_pll_data *plls, int num_plls, struct clk_onecell_data *clk_data) +int mtk_clk_register_plls(struct device_node *node, + const struct mtk_pll_data *plls, int num_plls, + struct clk_onecell_data *clk_data) { void __iomem *base; int i; @@ -379,7 +380,7 @@ void mtk_clk_register_plls(struct device_node *node, base = of_iomap(node, 0); if (!base) { pr_err("%s(): ioremap failed\n", __func__); - return; + return -EINVAL; } for (i = 0; i < num_plls; i++) { @@ -389,11 +390,25 @@ void mtk_clk_register_plls(struct device_node *node, if (IS_ERR(clk)) { pr_err("Failed to register clk %s: %pe\n", pll->name, clk); - continue; + goto err; } clk_data->clks[pll->id] = clk; } + + return 0; + +err: + while (--i >= 0) { + const struct mtk_pll_data *pll = &plls[i]; + + mtk_clk_unregister_pll(clk_data->clks[pll->id]); + clk_data->clks[pll->id] = ERR_PTR(-ENOENT); + }; + + iounmap(base); + + return PTR_ERR(clk); } EXPORT_SYMBOL_GPL(mtk_clk_register_plls); diff --git a/drivers/clk/mediatek/clk-pll.h b/drivers/clk/mediatek/clk-pll.h index a889b1e472e7..bf06e44caef9 100644 --- a/drivers/clk/mediatek/clk-pll.h +++ b/drivers/clk/mediatek/clk-pll.h @@ -48,9 +48,9 @@ struct mtk_pll_data { u8 pll_en_bit; /* Assume 0, indicates BIT(0) by default */ }; -void mtk_clk_register_plls(struct device_node *node, - const struct mtk_pll_data *plls, int num_plls, - struct clk_onecell_data *clk_data); +int mtk_clk_register_plls(struct device_node *node, + const struct mtk_pll_data *plls, int num_plls, + struct clk_onecell_data *clk_data); void mtk_clk_unregister_plls(const struct mtk_pll_data *plls, int num_plls, struct clk_onecell_data *clk_data); -- 2.35.0.rc0.227.g00780c9af4-goog _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek