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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 805EBC433E9 for ; Mon, 1 Mar 2021 22:42:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 53298601FF for ; Mon, 1 Mar 2021 22:42:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245524AbhCAWf3 (ORCPT ); Mon, 1 Mar 2021 17:35:29 -0500 Received: from mail.kernel.org ([198.145.29.99]:58248 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238707AbhCARiE (ORCPT ); Mon, 1 Mar 2021 12:38:04 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 821D564F38; Mon, 1 Mar 2021 16:55:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614617739; bh=v4/UjRAZBEZDC1o3dnjaJ3Yuwj9jEtLBt4a+3JRnJqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MmiVbjn92Io+XCuH/OkWIxeWVMS9t/gYbGjxkI58aeuBJ6s4bfRxm/6b79ZAMY4wZ w/YvCKyoXuVGYtYJc/REbv2YhJ/9ptq6slmI8gM1A6XG/qTItXMzXP/w3Qh0rErSHB nu8yvD2UXabVz07npNeU5f2wkHUwQ5XpQ0BB4P68= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shay Drory , Leon Romanovsky , Jason Gunthorpe , Sasha Levin Subject: [PATCH 5.4 162/340] IB/umad: Return EIO in case of when device disassociated Date: Mon, 1 Mar 2021 17:11:46 +0100 Message-Id: <20210301161056.292530134@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161048.294656001@linuxfoundation.org> References: <20210301161048.294656001@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shay Drory [ Upstream commit 4fc5461823c9cad547a9bdfbf17d13f0da0d6bb5 ] MAD message received by the user has EINVAL error in all flows including when the device is disassociated. That makes it impossible for the applications to treat such flow differently. Change it to return EIO, so the applications will be able to perform disassociation recovery. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Link: https://lore.kernel.org/r/20210125121339.837518-2-leon@kernel.org Signed-off-by: Shay Drory Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/core/user_mad.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/core/user_mad.c b/drivers/infiniband/core/user_mad.c index da229eab59032..dec5175803fe2 100644 --- a/drivers/infiniband/core/user_mad.c +++ b/drivers/infiniband/core/user_mad.c @@ -379,6 +379,11 @@ static ssize_t ib_umad_read(struct file *filp, char __user *buf, mutex_lock(&file->mutex); + if (file->agents_dead) { + mutex_unlock(&file->mutex); + return -EIO; + } + while (list_empty(&file->recv_list)) { mutex_unlock(&file->mutex); @@ -524,7 +529,7 @@ static ssize_t ib_umad_write(struct file *filp, const char __user *buf, agent = __get_agent(file, packet->mad.hdr.id); if (!agent) { - ret = -EINVAL; + ret = -EIO; goto err_up; } -- 2.27.0