From patchwork Wed Dec 4 15:59:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1204250 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="kDu4Z9b9"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47SkBD65gKz9sSH for ; Thu, 5 Dec 2019 03:01:56 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728598AbfLDQBv (ORCPT ); Wed, 4 Dec 2019 11:01:51 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:43026 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728565AbfLDP71 (ORCPT ); Wed, 4 Dec 2019 10:59:27 -0500 Received: by mail-wr1-f67.google.com with SMTP id d16so4603407wre.10 for ; Wed, 04 Dec 2019 07:59:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=mx3ZyJkzQPPgrO9SEUEcMUEUo3OWsFykUUjXQ0ufMTY=; b=kDu4Z9b9TDdsQYYk9Aqa2AQIyrhUX8gwTrtcLtcSwl0pJqKg20tfOsdEPijAgMn5+z nY/4Nfgt91kwHD1aGecwkRT5WdBHqkxj+s1RvC+ZtbtSLKkGuV9HjV9lG7Q1YrDhpI9o oVRiSevz9IxfxKgKJDlzybR18/LNWQKvUNUdGFjJwEpiu9AlXo1nOz+aGNfIbXzFacCg DKjwnNc4qvfGZuXuJl6CEdV3m9VvX4wRUy+2X9p+bOECsdUDpnHeViZWGGSMPzoGC7N3 wPvEeEvy/FYGjjc9b8o/Mf7vAZzBUEbMx8P/7b8fF2jwRHHIDHeGVfsvIUqeC4nQWOw2 pYwA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mx3ZyJkzQPPgrO9SEUEcMUEUo3OWsFykUUjXQ0ufMTY=; b=odLskaFqvfnExwMlvqMv68OwsYKmOdcSwJQJJVvEKjihQAI485F/BmTVR4DzCbxiQc PiG/Cj7ISKsSU2hQl8ey7FcQzN3fiQHVsxGD+i5RMQ9+uz+HPmJjlxkobW761k/PsDkl wxK1SzN4u5UZOVGxHyWd99JjhIACKEYFChUHDJCevXJd/U5cZX9ESDreZKsC+TJY4EvP G/P3sB8HTbKZlOLi81Su0eGZpzAxePU3SmUhMGS9s7Im3uzGOVNGUBpFF7qV3Ty1053U wdmYgrrJxF0PucDK0zUxPisuWzi3mxPqhFF2Fo0Ei2Jhjs7GvHwUpwWvDF0RdpiV1iAq BA0w== X-Gm-Message-State: APjAAAW546SXh5VkTE6UAsXBGiKpTOCHdHoTKx7KuXPIQiCuZv/GEinH aR4mu2E3VnwS/aCyW3sc+NlgFw== X-Google-Smtp-Source: APXvYqzBZmJRWvmbxNfjw0aGh+a1bvW1bU9MEAlgciuDoB8pzU/15i1PHt+f+DRqxgnI4+LF3onsxg== X-Received: by 2002:a5d:5708:: with SMTP id a8mr5111893wrv.79.1575475165950; Wed, 04 Dec 2019 07:59:25 -0800 (PST) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id u18sm8640508wrt.26.2019.12.04.07.59.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Dec 2019 07:59:25 -0800 (PST) From: Bartosz Golaszewski To: Kent Gibson , Linus Walleij Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v2 06/11] gpiolib: use gpiochip_get_desc() in gpio_ioctl() Date: Wed, 4 Dec 2019 16:59:09 +0100 Message-Id: <20191204155912.17590-7-brgl@bgdev.pl> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191204155912.17590-1-brgl@bgdev.pl> References: <20191204155912.17590-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Bartosz Golaszewski Unduplicate the offset check by simply calling gpiochip_get_desc() and checking its return value. Signed-off-by: Bartosz Golaszewski Reviewed-by: Andy Shevchenko --- drivers/gpio/gpiolib.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 17796437d7be..b7043946c029 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1175,10 +1175,11 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) if (copy_from_user(&lineinfo, ip, sizeof(lineinfo))) return -EFAULT; - if (lineinfo.line_offset >= gdev->ngpio) - return -EINVAL; - desc = &gdev->descs[lineinfo.line_offset]; + desc = gpiochip_get_desc(chip, lineinfo.line_offset); + if (IS_ERR(desc)) + return PTR_ERR(desc); + if (desc->name) { strncpy(lineinfo.name, desc->name, sizeof(lineinfo.name));