From patchwork Sun Oct 31 03:24:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12594921 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90FA9C433EF for ; Sun, 31 Oct 2021 03:24:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 65D326101B for ; Sun, 31 Oct 2021 03:24:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231877AbhJaD0s (ORCPT ); Sat, 30 Oct 2021 23:26:48 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:49294 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229887AbhJaD0s (ORCPT ); Sat, 30 Oct 2021 23:26:48 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 19V3OFJD018070; Sat, 30 Oct 2021 22:24:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1635650655; bh=mDiH3KIIJnrJ4m8eBhF/73VpP13wJusqmGq7QXE/f2k=; h=From:To:CC:Subject:Date; b=y7W0G2AQ7pZQDwkGSrbKqlHA5aAfvjrOba1vLvcXqAMqKw4Meo4h7KIgifHtckY3C /68Vkk9Djy9WkTu7YYtHfmLZ6eQjaiSEhY/YEuw09rkhngLTzj4qwiguLzvB8I511e 7c+camqSd40PK1xeJM+VrinlHaUTeDIgplPjFV5s= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 19V3OFBW108783 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Sat, 30 Oct 2021 22:24:15 -0500 Received: from DFLE101.ent.ti.com (10.64.6.22) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Sat, 30 Oct 2021 22:24:15 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Sat, 30 Oct 2021 22:24:15 -0500 Received: from a0393678-lt.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 19V3OCwK084685; Sat, 30 Oct 2021 22:24:12 -0500 From: Kishon Vijay Abraham I To: Peter Ujfalusi , Vinod Koul CC: , , Vignesh Raghavendra , Kishon Vijay Abraham I Subject: [PATCH v4 0/2] dmaengine: ti: k3-udma: Fix NULL pointer dereference error Date: Sun, 31 Oct 2021 08:54:09 +0530 Message-ID: <20211031032411.27235-1-kishon@ti.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org NULL pointer de-reference error was observed when all the PCIe endpoint functions (22 function in J721E) request a DMA channel. The issue was specfically observed when using mem-to-mem copy. Changes from v3: 1) Fix commit subject 2) Add "Acked-by: Peter Ujfalusi " and cc'ed stable Changes from v2: 1) Fix commit subject and commit log to mention bchan/rchan/tchan to NULL suggested by Peter. Changes from v1: 1) Split the patch for BCDMA and PKTDMA separately 2) Fixed the return value of udma_get_rflow() to 0. 3) Removed the fixes tag as the patches does not directly apply to the commits. v1 => https://lore.kernel.org/r/20210209090036.30832-1-kishon@ti.com v2 => https://lore.kernel.org/r/20211027055625.11150-1-kishon@ti.com v3 => https://lore.kernel.org/r/20211029151251.26421-1-kishon@ti.com Kishon Vijay Abraham I (2): dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail dmaengine: ti: k3-udma: Set r/tchan or rflow to NULL if request fail drivers/dma/ti/k3-udma.c | 32 ++++++++++++++++++++++++++------ 1 file changed, 26 insertions(+), 6 deletions(-)