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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2D90C77B7F for ; Tue, 18 Apr 2023 12:38:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231784AbjDRMiN (ORCPT ); Tue, 18 Apr 2023 08:38:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231785AbjDRMiM (ORCPT ); Tue, 18 Apr 2023 08:38:12 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8EE813860 for ; Tue, 18 Apr 2023 05:38:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 45381632C9 for ; Tue, 18 Apr 2023 12:38:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C436C433EF; Tue, 18 Apr 2023 12:38:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1681821482; bh=QIjYVfhD4/s7Kmz/eMUMK44QfMHT9KQvNLUIggOotl8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RUyy1ybY+wTJpRSzQeXSzYytq+c6UDIm42W0HvxR8Cu86aZRaQN8s6zpvmO2IuTQY 1sZDnwUIlaaP0LHZu4CUu6gzivMw2pd4sU7Mc8x2jJUuFNTovDWUcndGlLrIhcLHsi L+mgvJgwMGMkbj5zbC3UjWvb/OSlViOwb8oia86Y= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Chunyan Zhang , Stephen Boyd , Sasha Levin Subject: [PATCH 5.15 19/91] clk: sprd: set max_register according to mapping range Date: Tue, 18 Apr 2023 14:21:23 +0200 Message-Id: <20230418120306.254973665@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230418120305.520719816@linuxfoundation.org> References: <20230418120305.520719816@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chunyan Zhang [ Upstream commit 47d43086531f10539470a63e8ad92803e686a3dd ] In sprd clock driver, regmap_config.max_register was set to a fixed value which is likely larger than the address range configured in device tree, when reading registers through debugfs it would cause access violation. Fixes: d41f59fd92f2 ("clk: sprd: Add common infrastructure") Signed-off-by: Chunyan Zhang Link: https://lore.kernel.org/r/20230316023624.758204-1-chunyan.zhang@unisoc.com Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/sprd/common.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/clk/sprd/common.c b/drivers/clk/sprd/common.c index ce81e4087a8fc..2bfbab8db94bf 100644 --- a/drivers/clk/sprd/common.c +++ b/drivers/clk/sprd/common.c @@ -17,7 +17,6 @@ static const struct regmap_config sprdclk_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, - .max_register = 0xffff, .fast_io = true, }; @@ -43,6 +42,8 @@ int sprd_clk_regmap_init(struct platform_device *pdev, struct device *dev = &pdev->dev; struct device_node *node = dev->of_node, *np; struct regmap *regmap; + struct resource *res; + struct regmap_config reg_config = sprdclk_regmap_config; if (of_find_property(node, "sprd,syscon", NULL)) { regmap = syscon_regmap_lookup_by_phandle(node, "sprd,syscon"); @@ -59,12 +60,14 @@ int sprd_clk_regmap_init(struct platform_device *pdev, return PTR_ERR(regmap); } } else { - base = devm_platform_ioremap_resource(pdev, 0); + base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(base)) return PTR_ERR(base); + reg_config.max_register = resource_size(res) - reg_config.reg_stride; + regmap = devm_regmap_init_mmio(&pdev->dev, base, - &sprdclk_regmap_config); + ®_config); if (IS_ERR(regmap)) { pr_err("failed to init regmap\n"); return PTR_ERR(regmap); -- 2.39.2