From patchwork Tue May 11 08:28:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen \(ThunderTown\)" X-Patchwork-Id: 434167 Delivered-To: patch@linaro.org Received: by 2002:a02:c901:0:0:0:0:0 with SMTP id t1csp3609368jao; Tue, 11 May 2021 01:29:10 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwt7aNoiA94rwXlttL6LrUCTGK0G1JQea0LvnLrAGtPmMb8BAY0NoFyhX0IR235b6NFKSwn X-Received: by 2002:a17:90a:77c8:: with SMTP id e8mr4016020pjs.69.1620721750341; Tue, 11 May 2021 01:29:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1620721750; cv=none; d=google.com; s=arc-20160816; b=nZYlSgu2AhpypyuzoDXuXOaBATBqniOtjeED1tonl7jmoCxzG/Ef1Q9v5mJuXGpBPq U63E+aw7NV6KJawdke7LFvpLpnpJVMp5hpPzr2Dkhqixi8zi68+dNIjce0o3GIhNJ/9j Y0xfMkO8ggR241dXX1/2xhr0glpWXFDohZPWPd9V4andH8xXg8mgoLZ9AqAegUHqKKFG hIyfwdeNpAvQRff4fzf5eG/RUMx6Gw8Ma8afF59qDKmSIalHTInL9JoL7tLmemDtfgan sZLxMT43sZ/oX2VCdTEkNQCzqIS6cFtGI32pl+mXEHPToj7UJB/hDTYVy7zleHHErNRe QJ5A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:to:from :delivered-to; bh=jl15kt/CQLJW7ikImHZ9VNVOB9PBB5zoexvJ5Uilutk=; b=hzQWUPqYiFBSaLukN6+kwEp0C0YbQIJeEvnNeFLbXbSaUwNpz/LUC2qbjAqec8k1xG FvBuyZepsUxgnTgaqjKGVKdwCexrrlGKJ8dQhHHhbzN8oSV63y6H5vGEfwB3zQqsebr8 7vnIAXI/8DOwgJC+dSfCOg2Cu1XpYkNg2/Qz+wCkR+zQpNyPDdr6ZS18RCbKDinR0f5f /vfFR1E4jjVSm9WCPPjTobBTeYuAcohBZHmE6Ru3nKFOEy83OowvE5Qqogo8NTXi2l0m L1MO342NIIIzcZTuXxSevgv97R9gTmPpM3qjI1VuFSwZTwv+rfBUK4RhKXXOSBXA1bnw Uqkg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Return-Path: Received: from gabe.freedesktop.org (gabe.freedesktop.org. [2610:10:20:722:a800:ff:fe36:1795]) by mx.google.com with ESMTPS id ot4si2374922pjb.158.2021.05.11.01.29.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 01:29:10 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) client-ip=2610:10:20:722:a800:ff:fe36:1795; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EB0DA89FC8; Tue, 11 May 2021 08:29:06 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from szxga06-in.huawei.com (szxga06-in.huawei.com [45.249.212.32]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0A4756E51B; Tue, 11 May 2021 08:29:06 +0000 (UTC) Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4FfWHK1DLbzlZFK; Tue, 11 May 2021 16:26:53 +0800 (CST) Received: from thunder-town.china.huawei.com (10.174.177.72) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.498.0; Tue, 11 May 2021 16:28:56 +0800 From: Zhen Lei To: Ben Skeggs , David Airlie , "Daniel Vetter" , Pierre Moreau , dri-devel , nouveau Subject: [PATCH v2 1/2] drm/nouveau: Fix ida leak Date: Tue, 11 May 2021 16:28:40 +0800 Message-ID: <20210511082841.4181-2-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20210511082841.4181-1-thunder.leizhen@huawei.com> References: <20210511082841.4181-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.72] X-CFilter-Loop: Reflected X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhen Lei Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" When the 'nb' value allocated from 'bl_ida' is greater than or equal to 100, it will not be released. In fact, we can simplify operations by limiting the range of idas that can be applied for. By the way, delete the const modifier of the local variable 'nb'. Fixes: db1a0ae21461 ("drm/nouveau/bl: Assign different names to interfaces") Signed-off-by: Zhen Lei --- drivers/gpu/drm/nouveau/nouveau_backlight.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) -- 2.26.0.106.g9fadedd diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c index 72f35a2babcb20e..d1c998e645fb4b6 100644 --- a/drivers/gpu/drm/nouveau/nouveau_backlight.c +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c @@ -51,8 +51,9 @@ static bool nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE], struct nouveau_backlight *bl) { - const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL); - if (nb < 0 || nb >= 100) + int nb = ida_simple_get(&bl_ida, 0, 100, GFP_KERNEL); + + if (nb < 0) return false; if (nb > 0) snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb); From patchwork Tue May 11 08:28:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen \(ThunderTown\)" X-Patchwork-Id: 434169 Delivered-To: patch@linaro.org Received: by 2002:a02:c901:0:0:0:0:0 with SMTP id t1csp3609431jao; Tue, 11 May 2021 01:29:15 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwgtEkteITVqbWcOZDERolT9l2pCeUdANUqn4qxRF7SWXsDzA1TmvMPippQuojANvtA3hg+ X-Received: by 2002:a17:902:b68c:b029:eb:6c82:60da with SMTP id c12-20020a170902b68cb02900eb6c8260damr29148950pls.25.1620721755175; Tue, 11 May 2021 01:29:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1620721755; cv=none; d=google.com; s=arc-20160816; b=wkvtHdJssk5vg+5yx9yJeLEw7Cq3R7/hX5CRm/ZiIz2oLVmLwNZETlZCM5/KIFtt0T EsHZk6hGyKZIt60AjowXBmoT3cBBgWOlWAcbCpnmnA1ZUlyJetkNi7oNt/F8ftdFzNfS tAzMzNdPCQfhc+Ubd/hL+EJ/trtdokX14IsT3NpSGCXBmSFXftWA8cJ7fXDYvB9JneTZ gFVdw4MrH2KBlyEfTfbC4NQcW9dvbkDxle0mGZEztQYonw/gXYgKgOT9zovZIJVFTq7e dHgf0yAxMs0zl2RpsEUULfZ+Sc3SRB5IcMdy8iimU+cFvDDVrI7aqcE4Jx/cH+i9ff+p KhXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:to:from :delivered-to; bh=1PmKguI8sElx1vUv3TgSVNxTQnVFe5XO/A75YIGYP6Y=; b=Zrim8i0MemY1HSZ7enw8kYQiE8mLE0UIY8EhHNKqDUV2R9lrfIF2nYdCjOxiAIJOm3 e1Kn/YTr0cGQwdVxTJzzxs4kVE6aGlgfqmwp9yG1MMJNMP6CHW9+iXId85npy6i6YyxK Y9WRxXSXa7Pxhd+5I5IsJbA7BA+N8j6tQkWnXCVkyX36J9Kuu+KGaPlMvUfiKhXB7al+ Pi7dG5lnavmtEp0dA85CCQ6/P+xWi7bxGUO23qeQ78mfqcZiH+CQm/pN1TsGmCJjRGEq iDPYxthAboRl0JCmeYJvvdgfSZ6EAc8AhDUbcmMXoqSLWBzspmIq8N3PcJ8Uv8aMO7yy 66/g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Return-Path: Received: from gabe.freedesktop.org (gabe.freedesktop.org. [2610:10:20:722:a800:ff:fe36:1795]) by mx.google.com with ESMTPS id p5si21371756pgd.357.2021.05.11.01.29.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 May 2021 01:29:15 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) client-ip=2610:10:20:722:a800:ff:fe36:1795; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of dri-devel-bounces@lists.freedesktop.org designates 2610:10:20:722:a800:ff:fe36:1795 as permitted sender) smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=huawei.com Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6277E6E9F7; Tue, 11 May 2021 08:29:10 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from szxga06-in.huawei.com (szxga06-in.huawei.com [45.249.212.32]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0BDD86E9F2; Tue, 11 May 2021 08:29:06 +0000 (UTC) Received: from DGGEMS407-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4FfWHK1jwPzlbM5; Tue, 11 May 2021 16:26:53 +0800 (CST) Received: from thunder-town.china.huawei.com (10.174.177.72) by DGGEMS407-HUB.china.huawei.com (10.3.19.207) with Microsoft SMTP Server id 14.3.498.0; Tue, 11 May 2021 16:28:56 +0800 From: Zhen Lei To: Ben Skeggs , David Airlie , "Daniel Vetter" , Pierre Moreau , dri-devel , nouveau Subject: [PATCH v2 2/2] drm/nouveau: Fix error return code in nouveau_backlight_init() Date: Tue, 11 May 2021 16:28:41 +0800 Message-ID: <20210511082841.4181-3-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20210511082841.4181-1-thunder.leizhen@huawei.com> References: <20210511082841.4181-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.72] X-CFilter-Loop: Reflected X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhen Lei Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Fix to return a negative error code from the error handling case instead of 0, as done elsewhere in this function. Fixes: db1a0ae21461 ("drm/nouveau/bl: Assign different names to interfaces") Suggested-by: Pierre Moreau Signed-off-by: Zhen Lei --- drivers/gpu/drm/nouveau/nouveau_backlight.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) -- 2.26.0.106.g9fadedd Reviewed-by: Pierre Moreau diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c index d1c998e645fb4b6..f0856adbe775624 100644 --- a/drivers/gpu/drm/nouveau/nouveau_backlight.c +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c @@ -47,20 +47,20 @@ struct nouveau_backlight { int id; }; -static bool +static int nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE], struct nouveau_backlight *bl) { int nb = ida_simple_get(&bl_ida, 0, 100, GFP_KERNEL); if (nb < 0) - return false; + return nb; if (nb > 0) snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb); else snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight"); bl->id = nb; - return true; + return 0; } static int @@ -273,7 +273,8 @@ nouveau_backlight_init(struct drm_connector *connector) if (!bl) return -ENOMEM; - if (!nouveau_get_backlight_name(backlight_name, bl)) { + ret = nouveau_get_backlight_name(backlight_name, bl); + if (ret) { NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n"); goto fail_alloc; }