From patchwork Sun Dec 19 00:19:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Brost X-Patchwork-Id: 12686567 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 A86ADC433EF for ; Sun, 19 Dec 2021 00:24:42 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 982421128F8; Sun, 19 Dec 2021 00:24:36 +0000 (UTC) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by gabe.freedesktop.org (Postfix) with ESMTPS id E307D1128C4; Sun, 19 Dec 2021 00:24:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1639873474; x=1671409474; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=kjOwRStuTJQk0uvje5Z73Zv6ytIByxzsC+2+3AEqydY=; b=cDr2r1YMI0ARrjhwL9ldyxCm0Zc3eGBjHy0rAH+y77Ds1X4N3hk4rKID RyBEWV6PHqaL5RxvG1RaO6eD2EUdGfDx3WFJRR35WbGDs3wDz0ycvVb3l JAQj9wIVjnbgwe3jgdcGubIX6pVZFGf+rAj58cznN+S3y9mTGrMHfytY6 HW1TC9J6CkSsGQkgDbACpYiV4FkB/q8KR/Gr3GhuAjml6MXiTmtlXTekg rL/yKWafd4xQ6E1wIPmeLKwWQtWmUlBaylDNF3Cqc/KWlruRA5cw8YdR2 GJjPNrEF6FHS6IWWOeqs/EfPuaIBFffUSxAWWbgJ/1hJ1NymMAEWtpkag Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10202"; a="240185615" X-IronPort-AV: E=Sophos;i="5.88,217,1635231600"; d="scan'208";a="240185615" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2021 16:24:34 -0800 X-IronPort-AV: E=Sophos;i="5.88,217,1635231600"; d="scan'208";a="683805943" Received: from jons-linux-dev-box.fm.intel.com ([10.1.27.20]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Dec 2021 16:24:33 -0800 From: Matthew Brost To: , Date: Sat, 18 Dec 2021 16:19:09 -0800 Message-Id: <20211219001909.24348-1-matthew.brost@intel.com> X-Mailer: git-send-email 2.33.1 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH] drm/i915: Fix possible uninitialized variable in parallel extension 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" 'prev_engine' was declared inside the output loop and checked in the inner after at least 1 pass of either loop. The variable should be declared outside both loops as it needs to be persistent across the entire loop structure. Fixes: e5e32171a2cf ("drm/i915/guc: Connect UAPI to GuC multi-lrc interface") Signed-off-by: Matthew Brost Reviewed-by: Lucas De Marchi --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index 347dab952e90..97d2ac22ae55 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -564,6 +564,7 @@ set_proto_ctx_engines_parallel_submit(struct i915_user_extension __user *base, container_of_user(base, typeof(*ext), base); const struct set_proto_ctx_engines *set = data; struct drm_i915_private *i915 = set->i915; + struct i915_engine_class_instance prev_engine; u64 flags; int err = 0, n, i, j; u16 slot, width, num_siblings; @@ -629,7 +630,6 @@ set_proto_ctx_engines_parallel_submit(struct i915_user_extension __user *base, /* Create contexts / engines */ for (i = 0; i < width; ++i) { intel_engine_mask_t current_mask = 0; - struct i915_engine_class_instance prev_engine; for (j = 0; j < num_siblings; ++j) { struct i915_engine_class_instance ci;