From patchwork Fri Jan 10 13:19:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 207425 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=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 394FAC33CAC for ; Fri, 10 Jan 2020 13:19:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1263E20842 for ; Fri, 10 Jan 2020 13:19:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727478AbgAJNTf (ORCPT ); Fri, 10 Jan 2020 08:19:35 -0500 Received: from xavier.telenet-ops.be ([195.130.132.52]:37022 "EHLO xavier.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727617AbgAJNTb (ORCPT ); Fri, 10 Jan 2020 08:19:31 -0500 Received: from ramsan ([84.195.182.253]) by xavier.telenet-ops.be with bizsmtp id odKU2100H5USYZQ01dKUsW; Fri, 10 Jan 2020 14:19:28 +0100 Received: from rox.of.borg ([192.168.97.57]) by ramsan with esmtp (Exim 4.90_1) (envelope-from ) id 1ipuCG-0007Wv-Bl; Fri, 10 Jan 2020 14:19:28 +0100 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1ipuCG-0000I7-Am; Fri, 10 Jan 2020 14:19:28 +0100 From: Geert Uytterhoeven To: Linus Walleij Cc: linux-gpio@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 05/13] pinctrl: sh-pfc: checker: Add check for enum ID conflicts Date: Fri, 10 Jan 2020 14:19:19 +0100 Message-Id: <20200110131927.1029-6-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200110131927.1029-1-geert+renesas@glider.be> References: <20200110131927.1029-1-geert+renesas@glider.be> Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add a helper to verify that enum IDs are unique, and use it to validate the enum ID arrays in config register descriptors. This exposes bugs like those fixed in: - commit 805f635703b2562b ("pinctrl: sh-pfc: r8a7778: Fix duplicate SDSELF_B and SD1_CLK_B"), - commit 884caadad128efad ("pinctrl: sh-pfc: sh7734: Fix duplicate TCLK1_B"), - commit 2a069a92811fb35b ("pinctrl: sh-pfc: sh7264: Fix Port K I/O Register 0 definition"). Signed-off-by: Geert Uytterhoeven --- drivers/pinctrl/sh-pfc/core.c | 49 +++++++++++++++++++++++++++++++++-- 1 file changed, 47 insertions(+), 2 deletions(-) diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c index 2edf6efe8dfe3fdf..f82f483b98a25da5 100644 --- a/drivers/pinctrl/sh-pfc/core.c +++ b/drivers/pinctrl/sh-pfc/core.c @@ -727,11 +727,14 @@ static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; } #ifdef DEBUG #define SH_PFC_MAX_REGS 300 +#define SH_PFC_MAX_ENUMS 3000 static unsigned int sh_pfc_errors __initdata = 0; static unsigned int sh_pfc_warnings __initdata = 0; static u32 *sh_pfc_regs __initdata = NULL; static u32 sh_pfc_num_regs __initdata = 0; +static u16 *sh_pfc_enums __initdata = NULL; +static u32 sh_pfc_num_enums __initdata = 0; #define sh_pfc_err(fmt, ...) \ do { \ @@ -781,6 +784,36 @@ static void __init sh_pfc_check_reg(const char *drvname, u32 reg) sh_pfc_regs[sh_pfc_num_regs++] = reg; } +static int __init __sh_pfc_check_enum(const char *drvname, u16 enum_id) +{ + unsigned int i; + + for (i = 0; i < sh_pfc_num_enums; i++) { + if (enum_id == sh_pfc_enums[i]) + return -EINVAL; + } + + if (sh_pfc_num_enums == SH_PFC_MAX_ENUMS) { + pr_warn_once("%s: Please increase SH_PFC_MAX_ENUMS\n", drvname); + return 0; + } + + sh_pfc_enums[sh_pfc_num_enums++] = enum_id; + return 0; +} + +static void __init sh_pfc_check_reg_enums(const char *drvname, u32 reg, + const u16 *enums, unsigned int n) +{ + unsigned int i; + + for (i = 0; i < n; i++) { + if (enums[i] && __sh_pfc_check_enum(drvname, enums[i])) + sh_pfc_err("reg 0x%x enum_id %u conflict\n", reg, + enums[i]); + } +} + static void __init sh_pfc_check_cfg_reg(const char *drvname, const struct pinmux_cfg_reg *cfg_reg) { @@ -789,8 +822,9 @@ static void __init sh_pfc_check_cfg_reg(const char *drvname, sh_pfc_check_reg(drvname, cfg_reg->reg); if (cfg_reg->field_width) { - /* Checked at build time */ - return; + n = cfg_reg->reg_width / cfg_reg->field_width; + /* Skip field checks (done at build time) */ + goto check_enum_ids; } for (i = 0, n = 0, rw = 0; (fw = cfg_reg->var_field_width[i]); i++) { @@ -808,6 +842,9 @@ static void __init sh_pfc_check_cfg_reg(const char *drvname, if (n != cfg_reg->nr_enum_ids) sh_pfc_err("reg 0x%x: enum_ids[] has %u instead of %u values\n", cfg_reg->reg, cfg_reg->nr_enum_ids, n); + +check_enum_ids: + sh_pfc_check_reg_enums(drvname, cfg_reg->reg, cfg_reg->enum_ids, n); } static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info) @@ -819,6 +856,7 @@ static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info) pr_info("Checking %s\n", drvname); sh_pfc_num_regs = 0; + sh_pfc_num_enums = 0; /* Check pins */ for (i = 0; i < info->nr_pins; i++) { @@ -898,6 +936,11 @@ static void __init sh_pfc_check_driver(const struct platform_driver *pdrv) if (!sh_pfc_regs) return; + sh_pfc_enums = kcalloc(SH_PFC_MAX_ENUMS, sizeof(*sh_pfc_enums), + GFP_KERNEL); + if (!sh_pfc_enums) + goto free_regs; + pr_warn("Checking builtin pinmux tables\n"); for (i = 0; pdrv->id_table[i].name[0]; i++) @@ -911,6 +954,8 @@ static void __init sh_pfc_check_driver(const struct platform_driver *pdrv) pr_warn("Detected %u errors and %u warnings\n", sh_pfc_errors, sh_pfc_warnings); + kfree(sh_pfc_enums); +free_regs: kfree(sh_pfc_regs); }