From patchwork Mon Apr 14 04:21:43 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhao, Yakui" X-Patchwork-Id: 3976301 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id AB7FC9F336 for ; Mon, 14 Apr 2014 04:33:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EEE6E201C0 for ; Mon, 14 Apr 2014 04:33:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 036D1201BF for ; Mon, 14 Apr 2014 04:33:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7F80D6E6D0; Sun, 13 Apr 2014 21:33:10 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [143.182.124.21]) by gabe.freedesktop.org (Postfix) with ESMTP id 14BED6E6C9 for ; Sun, 13 Apr 2014 21:33:05 -0700 (PDT) Received: from azsmga001.ch.intel.com ([10.2.17.19]) by azsmga101.ch.intel.com with ESMTP; 13 Apr 2014 21:33:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,854,1389772800"; d="scan'208";a="418553317" Received: from unknown (HELO localhost.localdomain.sh.intel.com) ([10.239.13.22]) by azsmga001.ch.intel.com with ESMTP; 13 Apr 2014 21:32:58 -0700 From: Zhao Yakui To: intel-gfx@lists.freedesktop.org Date: Mon, 14 Apr 2014 12:21:43 +0800 Message-Id: <1397449304-3224-6-git-send-email-yakui.zhao@intel.com> X-Mailer: git-send-email 1.7.10.1 In-Reply-To: <1397449304-3224-1-git-send-email-yakui.zhao@intel.com> References: <1397449304-3224-1-git-send-email-yakui.zhao@intel.com> Subject: [Intel-gfx] [PATCH V2 5/6] drm/i915: Update the restrict check to filter out wrong Ring ID passed by user-space X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-5.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP One extra ring is added in the kernel driver but it is transparent to the user-space application/middleware. In such case the number of the rings in kernel driver is bigger than that exported to the user-space. So it needs to filter out the wrong Ring ID passed by user-space. Signed-off-by: Zhao Yakui --- drivers/gpu/drm/i915/i915_gem_execbuffer.c | 2 +- drivers/gpu/drm/i915/intel_ringbuffer.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index 3491402..341ec68 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -1035,7 +1035,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, if (args->flags & I915_EXEC_IS_PINNED) flags |= I915_DISPATCH_PINNED; - if ((args->flags & I915_EXEC_RING_MASK) > I915_NUM_RINGS) { + if ((args->flags & I915_EXEC_RING_MASK) > LAST_USER_RING) { DRM_DEBUG("execbuf with unknown ring: %d\n", (int)(args->flags & I915_EXEC_RING_MASK)); return -EINVAL; diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 8ca4285..59f4cdd 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -64,6 +64,7 @@ struct intel_ring_buffer { VCS2, } id; #define I915_NUM_RINGS 5 +#define LAST_USER_RING (VECS + 1) u32 mmio_base; void __iomem *virtual_start; struct drm_device *dev;