From patchwork Wed Dec 29 23:14:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 528940 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 738D7C433F5 for ; Wed, 29 Dec 2021 23:15:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232879AbhL2XO7 (ORCPT ); Wed, 29 Dec 2021 18:14:59 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:53210 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232997AbhL2XO7 (ORCPT ); Wed, 29 Dec 2021 18:14:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1640819698; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nWKufP374NhpThr/0fTXnkcGUPKHZvuRN8HwgZ8t+PU=; b=de9zhth/6t16BTDircD484HfFHCj1jkrjcZxnN/JCbaFvkPOt/MkDquLi01+5XKU2kk6EN h6r0aCPqMucCMd7QiG6Q7DidZt1LJSbi8Lp1na1fUfFDllmanhLv/tnan8gCRX4WKdjKqa +Pd8I6RWNkfUOAEjQo+u/D2plDOm7JI= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-638-_D-Hae6vM6C9r5vzHt2pGg-1; Wed, 29 Dec 2021 18:14:55 -0500 X-MC-Unique: _D-Hae6vM6C9r5vzHt2pGg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 7E8E380BCA8; Wed, 29 Dec 2021 23:14:53 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.192.20]) by smtp.corp.redhat.com (Postfix) with ESMTP id D4C2A1037F5B; Wed, 29 Dec 2021 23:14:50 +0000 (UTC) From: Hans de Goede To: "Rafael J . Wysocki" , Mark Gross , Andy Shevchenko , Wolfram Sang , Mika Westerberg , Rob Herring , Greg Kroah-Hartman , Jiri Slaby Cc: Hans de Goede , Len Brown , linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-i2c@vger.kernel.org, Stephan Gerhold , linux-serial@vger.kernel.org Subject: [PATCH 06/12] platform/x86: x86-android-tablets: Add support for instantiating platform-devs Date: Thu, 30 Dec 2021 00:14:25 +0100 Message-Id: <20211229231431.437982-7-hdegoede@redhat.com> In-Reply-To: <20211229231431.437982-1-hdegoede@redhat.com> References: <20211229231431.437982-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Add support for instantiating platform-devs, note this also makes some small changes to the i2c_client instantiating code to make the 2 flows identical. Specifically for the pdevs flow pdev_count must only be set after allocating the pdevs array, to avoid a NULL ptr deref in x86_android_tablet_cleanup() and the i2c_clients flow is updated to work the same way. Signed-off-by: Hans de Goede --- drivers/platform/x86/x86-android-tablets.c | 36 ++++++++++++++++++---- 1 file changed, 30 insertions(+), 6 deletions(-) diff --git a/drivers/platform/x86/x86-android-tablets.c b/drivers/platform/x86/x86-android-tablets.c index 44138882bc9f..4bcad05d4039 100644 --- a/drivers/platform/x86/x86-android-tablets.c +++ b/drivers/platform/x86/x86-android-tablets.c @@ -20,6 +20,7 @@ #include #include #include +#include #include /* For gpio_get_desc() which is EXPORT_SYMBOL_GPL() */ #include "../../gpio/gpiolib.h" @@ -128,7 +129,9 @@ struct x86_i2c_client_info { struct x86_dev_info { const struct x86_i2c_client_info *i2c_client_info; + const struct platform_device_info *pdev_info; int i2c_client_count; + int pdev_count; }; /* @@ -269,7 +272,9 @@ static const struct dmi_system_id x86_android_tablet_ids[] __initconst = { MODULE_DEVICE_TABLE(dmi, x86_android_tablet_ids); static int i2c_client_count; +static int pdev_count; static struct i2c_client **i2c_clients; +static struct platform_device **pdevs; static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info, int idx) @@ -309,6 +314,11 @@ static void x86_android_tablet_cleanup(void) { int i; + for (i = 0; i < pdev_count; i++) + platform_device_unregister(pdevs[i]); + + kfree(pdevs); + for (i = 0; i < i2c_client_count; i++) i2c_unregister_device(i2c_clients[i]); @@ -327,21 +337,35 @@ static __init int x86_android_tablet_init(void) dev_info = id->driver_data; - i2c_client_count = dev_info->i2c_client_count; - - i2c_clients = kcalloc(i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL); + i2c_clients = kcalloc(dev_info->i2c_client_count, sizeof(*i2c_clients), GFP_KERNEL); if (!i2c_clients) return -ENOMEM; - for (i = 0; i < dev_info->i2c_client_count; i++) { + i2c_client_count = dev_info->i2c_client_count; + for (i = 0; i < i2c_client_count; i++) { ret = x86_instantiate_i2c_client(dev_info, i); if (ret < 0) { x86_android_tablet_cleanup(); - break; + return ret; + } + } + + pdevs = kcalloc(dev_info->pdev_count, sizeof(*pdevs), GFP_KERNEL); + if (!pdevs) { + x86_android_tablet_cleanup(); + return -ENOMEM; + } + + pdev_count = dev_info->pdev_count; + for (i = 0; i < pdev_count; i++) { + pdevs[i] = platform_device_register_full(&dev_info->pdev_info[i]); + if (IS_ERR(pdevs[i])) { + x86_android_tablet_cleanup(); + return PTR_ERR(pdevs[i]); } } - return ret; + return 0; } module_init(x86_android_tablet_init);