From mboxrd@z Thu Jan 1 00:00:00 1970 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 5109ACCA476 for ; Tue, 7 Oct 2025 13:05:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0F9A010E18C; Tue, 7 Oct 2025 13:05:11 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="kR6bIeeG"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) by gabe.freedesktop.org (Postfix) with ESMTPS id DA15A10E197 for ; Tue, 7 Oct 2025 13:05:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1759842310; x=1791378310; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=zRMWVz1uBzOO+c+7u+c3BPzlOO9bU1forizJQJDqwQA=; b=kR6bIeeGHE+hU2p2D8yR82DFWBmk/UdHjL1BGZE0+3U5vAPyVqrPSCB+ qhmphMMXD/ePf9SsU1vt+HJIQJbbEsUCoPt61Yw+lwEulzuRNMQXR/Rc2 jCmTdVJTBBOUhT5GF4wN3iIZ4CW4a8n/mI3usAN5KS2EKdsnzvW35R+nd 2mldxSPqXn1nO9DZ0sobQomAD5Vf/wYMOqjImAYj/JBigdIPs/3yj8ZRy EN5O31IUhxQA3PqKgGm4mrjizuxo2mxng0at5SNkRhU9bs7ViWu/+lbuN g/WbnlQq/wzZhgVp4LqVKA03Evt6Fw2fLiShA1g18lQu/pgdEWz4rzBKO g==; X-CSE-ConnectionGUID: Ej4oF5Q/QPmh2wXbCWNSWg== X-CSE-MsgGUID: taCIdMVkS/WbbS6DSM01+w== X-IronPort-AV: E=McAfee;i="6800,10657,11575"; a="64639820" X-IronPort-AV: E=Sophos;i="6.18,321,1751266800"; d="scan'208";a="64639820" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2025 06:05:10 -0700 X-CSE-ConnectionGUID: r5646AT2RrC/DuajgNWCdw== X-CSE-MsgGUID: 9dx+zbgEQLipXuYEfXycfA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,321,1751266800"; d="scan'208";a="180576916" Received: from lstrano-desk.jf.intel.com ([10.54.39.91]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Oct 2025 06:05:09 -0700 From: Matthew Brost To: intel-xe@lists.freedesktop.org Subject: [PATCH v8 01/33] drm/xe: Add NULL checks to scratch LRC allocation Date: Tue, 7 Oct 2025 06:04:33 -0700 Message-Id: <20251007130505.2694829-2-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251007130505.2694829-1-matthew.brost@intel.com> References: <20251007130505.2694829-1-matthew.brost@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" kmalloc can fail, the returned value must have a NULL check. This should be immediately after kmalloc for clarity. v5: - Assert state->buffer in setup_bo if buffer is iomem (Tomasz) Signed-off-by: Matthew Brost Reviewed-by: Tomasz Lis --- drivers/gpu/drm/xe/xe_lrc.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c index af09f70f6e78..2c6eae2de1f2 100644 --- a/drivers/gpu/drm/xe/xe_lrc.c +++ b/drivers/gpu/drm/xe/xe_lrc.c @@ -1214,8 +1214,7 @@ static int setup_bo(struct bo_setup_state *state) ssize_t remain; if (state->lrc->bo->vmap.is_iomem) { - if (!state->buffer) - return -ENOMEM; + xe_gt_assert(state->hwe->gt, state->buffer); state->ptr = state->buffer; } else { state->ptr = state->lrc->bo->vmap.vaddr + state->offset; @@ -1303,8 +1302,11 @@ static int setup_wa_bb(struct xe_lrc *lrc, struct xe_hw_engine *hwe) u32 *buf = NULL; int ret; - if (lrc->bo->vmap.is_iomem) + if (lrc->bo->vmap.is_iomem) { buf = kmalloc(LRC_WA_BB_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + } ret = xe_lrc_setup_wa_bb_with_scratch(lrc, hwe, buf); @@ -1347,8 +1349,11 @@ setup_indirect_ctx(struct xe_lrc *lrc, struct xe_hw_engine *hwe) if (xe_gt_WARN_ON(lrc->gt, !state.funcs)) return 0; - if (lrc->bo->vmap.is_iomem) + if (lrc->bo->vmap.is_iomem) { state.buffer = kmalloc(state.max_size, GFP_KERNEL); + if (!state.buffer) + return -ENOMEM; + } ret = setup_bo(&state); if (ret) { -- 2.34.1