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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80A34C43387 for ; Wed, 9 Jan 2019 19:22:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5760F214C6 for ; Wed, 9 Jan 2019 19:22:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728496AbfAITW4 (ORCPT ); Wed, 9 Jan 2019 14:22:56 -0500 Received: from ale.deltatee.com ([207.54.116.67]:59726 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728459AbfAITWt (ORCPT ); Wed, 9 Jan 2019 14:22:49 -0500 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1ghJR2-00053p-GA; Wed, 09 Jan 2019 12:22:48 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.89) (envelope-from ) id 1ghJR1-0001Ve-4X; Wed, 09 Jan 2019 12:22:39 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-ntb@googlegroups.com, Jon Mason Cc: Allen Hubbe , Dave Jiang , Serge Semin , Logan Gunthorpe Date: Wed, 9 Jan 2019 12:22:26 -0700 Message-Id: <20190109192233.5752-2-logang@deltatee.com> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20190109192233.5752-1-logang@deltatee.com> References: <20190109192233.5752-1-logang@deltatee.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-ntb@googlegroups.com, jdmason@kudzu.us, dave.jiang@intel.com, allenbh@gmail.com, fancer.lancer@gmail.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v3 1/8] NTB: ntb_tool: reading the link file should not end in a NULL byte X-SA-Exim-Version: 4.2.1 (built Tue, 02 Aug 2016 21:08:31 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When running ntb_test this warning is issued: ./ntb_test.sh: line 200: warning: command substitution: ignored null byte in input This is caused by the kernel returning one more byte than is necessary when reading the link file. Reduce the number of bytes read back to 2 as it was before the commit that regressed this. Fixes: 7f46c8b3a552 ("NTB: ntb_tool: Add full multi-port NTB API support") Signed-off-by: Logan Gunthorpe Acked-by: Allen Hubbe Tested-by: Alexander Fomichev --- drivers/ntb/test/ntb_tool.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c index d592c0ffbd19..ec5cf095cdb9 100644 --- a/drivers/ntb/test/ntb_tool.c +++ b/drivers/ntb/test/ntb_tool.c @@ -504,7 +504,7 @@ static ssize_t tool_peer_link_read(struct file *filep, char __user *ubuf, buf[1] = '\n'; buf[2] = '\0'; - return simple_read_from_buffer(ubuf, size, offp, buf, 3); + return simple_read_from_buffer(ubuf, size, offp, buf, 2); } static TOOL_FOPS_RDWR(tool_peer_link_fops, @@ -1690,4 +1690,3 @@ static void __exit tool_exit(void) debugfs_remove_recursive(tool_dbgfs_topdir); } module_exit(tool_exit); - -- 2.19.0