From patchwork Sat Aug 31 10:26:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jinjie Ruan X-Patchwork-Id: 13788692 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 32F8DCD3430 for ; Tue, 3 Sep 2024 12:52:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5DB3910E591; Tue, 3 Sep 2024 12:52:51 +0000 (UTC) X-Greylist: delayed 1183 seconds by postgrey-1.36 at gabe; Sat, 31 Aug 2024 10:38:20 UTC Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by gabe.freedesktop.org (Postfix) with ESMTPS id 57D2410E0FC for ; Sat, 31 Aug 2024 10:38:20 +0000 (UTC) Received: from mail.maildlp.com (unknown [172.19.162.254]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4WwrXb4pMSzpVBS; Sat, 31 Aug 2024 18:16:47 +0800 (CST) Received: from kwepemh500013.china.huawei.com (unknown [7.202.181.146]) by mail.maildlp.com (Postfix) with ESMTPS id 341D91800FE; Sat, 31 Aug 2024 18:18:34 +0800 (CST) Received: from huawei.com (10.90.53.73) by kwepemh500013.china.huawei.com (7.202.181.146) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Sat, 31 Aug 2024 18:18:33 +0800 From: Jinjie Ruan To: , , , , , , , , , , , , Subject: [PATCH -next] drm/i915: Use memdup_user() helper Date: Sat, 31 Aug 2024 18:26:48 +0800 Message-ID: <20240831102648.92714-1-ruanjinjie@huawei.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.90.53.73] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemh500013.china.huawei.com (7.202.181.146) X-Mailman-Approved-At: Tue, 03 Sep 2024 12:52:48 +0000 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Switching to memdup_user(), which combines kmalloc() and copy_from_user(), and it can simplfy code. Signed-off-by: Jinjie Ruan --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index c0543c35cd6a..c1cc41e90502 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -2159,18 +2159,12 @@ static int set_context_image(struct i915_gem_context *ctx, goto out_ce; } - state = kmalloc(ce->engine->context_size, GFP_KERNEL); - if (!state) { - ret = -ENOMEM; + state = memdup_user(u64_to_user_ptr(user.image), ce->engine->context_size); + if (IS_ERR(state)) { + ret = PTR_ERR(state); goto out_ce; } - if (copy_from_user(state, u64_to_user_ptr(user.image), - ce->engine->context_size)) { - ret = -EFAULT; - goto out_state; - } - shmem_state = shmem_create_from_data(ce->engine->name, state, ce->engine->context_size); if (IS_ERR(shmem_state)) {