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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D96D4C433FE for ; Fri, 29 Oct 2021 15:12:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C076A60F4B for ; Fri, 29 Oct 2021 15:12:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230070AbhJ2PP0 (ORCPT ); Fri, 29 Oct 2021 11:15:26 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:33624 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229888AbhJ2PPY (ORCPT ); Fri, 29 Oct 2021 11:15:24 -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 19TFCs9A110707; Fri, 29 Oct 2021 10:12:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1635520374; bh=gjHCN9lL4wOgJbm6UyjmgsutSc3XFZJF96HsDLCrINM=; h=From:To:CC:Subject:Date; b=PEO3YiaX5HLZwsEUFSF380norWWgU1XBbRIstKbsemmCtcWxUQ9F3QwNemyOuXR7i MoDiDE4DHWVCRBq3i9BICiZFIpTXL5Ihyh1GE8pqbOJWTaGlVrtKWfDtDnziQkDHnP AoTPKCLU1xp7lW1swSV7U71XmNS16RdrIqKDbPNA= Received: from DFLE107.ent.ti.com (dfle107.ent.ti.com [10.64.6.28]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 19TFCsWv055216 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 29 Oct 2021 10:12:54 -0500 Received: from DFLE115.ent.ti.com (10.64.6.36) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Fri, 29 Oct 2021 10:12:54 -0500 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE115.ent.ti.com (10.64.6.36) 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; Fri, 29 Oct 2021 10:12:54 -0500 Received: from a0393678-lt.ent.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 19TFCpTY114593; Fri, 29 Oct 2021 10:12:52 -0500 From: Kishon Vijay Abraham I To: Peter Ujfalusi , Vinod Koul CC: , , Vignesh Raghavendra , Kishon Vijay Abraham I Subject: [PATCH v3 0/2] dmaengine: ti: k3-udma: Fix NULL pointer dereference error Date: Fri, 29 Oct 2021 20:42:49 +0530 Message-ID: <20211029151251.26421-1-kishon@ti.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 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 Kishon Vijay Abraham I (2): dmaengine: ti: k3-udma: Set bchan to NULL if a channel request fail dmaengine: ti: k3-udma: Set rchan/tchan to NULL if a channel request fail drivers/dma/ti/k3-udma.c | 32 ++++++++++++++++++++++++++------ 1 file changed, 26 insertions(+), 6 deletions(-) -- 2.17.1