From patchwork Thu Sep 28 12:50:44 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 819572 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; secure) header.d=kapsi.fi header.i=@kapsi.fi header.b="lP3wx9dN"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3y2vht1RMvz9t3B for ; Thu, 28 Sep 2017 22:51:58 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753135AbdI1Mv5 (ORCPT ); Thu, 28 Sep 2017 08:51:57 -0400 Received: from mail.kapsi.fi ([91.232.154.25]:51720 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752840AbdI1Mv4 (ORCPT ); Thu, 28 Sep 2017 08:51:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=Z6fHG4VLcKPhH46k/asOQQuk13fXBSZ/AyUmtgg/9oY=; b=lP3wx9dN4CBaz46nU5F1V7uMYz3pZcHVZRApEaRbZ4d3ZIODv2stpP3u0Lp9vMH/AVEMEEeVnUGUBWoTJyLEWPJYmsUbKkAqggmStmKsLbo+yENDtjsIbW6XosmJa+17ZRC3BX6eHInc7GdBJLSXWuHApGrRa8HMEoePaI2SPkTzcK4cH08ZG2fMGZIfQHZ840UL0v+vlEH5AG+mVLjrmrs0Hc0fygF3cKc8DJBXACCE2Igaq7SuOAkFUBZAtG+gFGwpn9Cz4O9txJB8ozYlgj//JTkKZNnTmDG5vY7/I+QoZY42SUrMk1CUgQKtrjgvkpmz/Lurk2c8T+smwxbYZw==; Received: from dsl-hkibng22-54f983-249.dhcp.inet.fi ([84.249.131.249] helo=localhost.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.84_2) (envelope-from ) id 1dxYIC-0007ES-74; Thu, 28 Sep 2017 15:51:52 +0300 From: Mikko Perttunen To: thierry.reding@gmail.com, jonathanh@nvidia.com Cc: digetx@gmail.com, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Mikko Perttunen Subject: [PATCH v3 6/6] drm/tegra: Use u64_to_user_ptr helper Date: Thu, 28 Sep 2017 15:50:44 +0300 Message-Id: <20170928125044.32516-7-mperttunen@nvidia.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170928125044.32516-1-mperttunen@nvidia.com> References: <20170928125044.32516-1-mperttunen@nvidia.com> X-SA-Exim-Connect-IP: 84.249.131.249 X-SA-Exim-Mail-From: mperttunen@nvidia.com X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Use the u64_to_user_ptr helper macro to cast IOCTL argument u64 values to user pointers instead of writing out the cast manually. Also do some other cleanup with user pointers to make them stand out more and look cleaner. Signed-off-by: Mikko Perttunen Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko --- drivers/gpu/drm/tegra/drm.c | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 130d193192ee..943bdf88c4a2 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -386,12 +386,10 @@ int tegra_drm_submit(struct tegra_drm_context *context, unsigned int num_cmdbufs = args->num_cmdbufs; unsigned int num_relocs = args->num_relocs; unsigned int num_waitchks = args->num_waitchks; - struct drm_tegra_cmdbuf __user *cmdbufs = - (void __user *)(uintptr_t)args->cmdbufs; - struct drm_tegra_reloc __user *relocs = - (void __user *)(uintptr_t)args->relocs; - struct drm_tegra_waitchk __user *waitchks = - (void __user *)(uintptr_t)args->waitchks; + struct drm_tegra_cmdbuf __user *user_cmdbufs; + struct drm_tegra_reloc __user *user_relocs; + struct drm_tegra_waitchk __user *user_waitchks; + struct drm_tegra_syncpt __user *user_syncpt; struct drm_tegra_syncpt syncpt; struct host1x *host1x = dev_get_drvdata(drm->dev->parent); struct drm_gem_object **refs; @@ -400,6 +398,11 @@ int tegra_drm_submit(struct tegra_drm_context *context, unsigned int num_refs; int err; + user_cmdbufs = u64_to_user_ptr(args->cmdbufs); + user_relocs = u64_to_user_ptr(args->relocs); + user_waitchks = u64_to_user_ptr(args->waitchks); + user_syncpt = u64_to_user_ptr(args->syncpts); + /* We don't yet support other than one syncpt_incr struct per submit */ if (args->num_syncpts != 1) return -EINVAL; @@ -440,7 +443,7 @@ int tegra_drm_submit(struct tegra_drm_context *context, struct tegra_bo *obj; u64 offset; - if (copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf))) { + if (copy_from_user(&cmdbuf, user_cmdbufs, sizeof(cmdbuf))) { err = -EFAULT; goto fail; } @@ -476,7 +479,7 @@ int tegra_drm_submit(struct tegra_drm_context *context, host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset); num_cmdbufs--; - cmdbufs++; + user_cmdbufs++; } /* copy and resolve relocations from submit */ @@ -485,7 +488,7 @@ int tegra_drm_submit(struct tegra_drm_context *context, struct tegra_bo *obj; err = host1x_reloc_copy_from_user(&job->relocarray[num_relocs], - &relocs[num_relocs], drm, + &user_relocs[num_relocs], drm, file); if (err < 0) goto fail; @@ -519,9 +522,8 @@ int tegra_drm_submit(struct tegra_drm_context *context, struct host1x_waitchk *wait = &job->waitchk[num_waitchks]; struct tegra_bo *obj; - err = host1x_waitchk_copy_from_user(wait, - &waitchks[num_waitchks], - file); + err = host1x_waitchk_copy_from_user( + wait, &user_waitchks[num_waitchks], file); if (err < 0) goto fail; @@ -539,8 +541,7 @@ int tegra_drm_submit(struct tegra_drm_context *context, } } - if (copy_from_user(&syncpt, (void __user *)(uintptr_t)args->syncpts, - sizeof(syncpt))) { + if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) { err = -EFAULT; goto fail; }