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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 7B930C2BBC7 for ; Sat, 11 Apr 2020 23:15:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 520E320CC7 for ; Sat, 11 Apr 2020 23:15:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646940; bh=Ddv9SF++LpKiw+2zYXDKW5JRkO4JX8S6DIl7nFsv+Ok=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=LiM6VHQNDMes4TeU3Lk4loiapKKuQYJyBmDaDvq+bJESqq8V6wcryADrhbwIl6TWQ c1vfKZzcLO7RhoYmNN7ek6cEHkm3BYSnSUlpgwtR4PCTGOB1H5LY+bNObyPHdoLph0 GDVqs6mjKM3UB0IZuvUay/57BarjS7Kx1z6ffH94= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730681AbgDKXPf (ORCPT ); Sat, 11 Apr 2020 19:15:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:57256 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730937AbgDKXPC (ORCPT ); Sat, 11 Apr 2020 19:15:02 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 92B7F215A4; Sat, 11 Apr 2020 23:15:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586646902; bh=Ddv9SF++LpKiw+2zYXDKW5JRkO4JX8S6DIl7nFsv+Ok=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z16b8RWIIaPkfXbp/xv1aAJIW2m+JisZkHkRbTEtwMgSGTlOBdQsolC2SwMSh/RZa d7Rwlk17X+bge0lDnp2QHqb9hnurSZ81m92oU9ylWHFgfmIua2QziJSt2YstTl/Pm9 V0bSInNzcLqBIbiDr0poTIwepn8VIgY/uf+UAb6Y= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Smart , Dick Kennedy , "Martin K . Petersen" , Sasha Levin , linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 12/16] scsi: lpfc: Fix RQ buffer leakage when no IOCBs available Date: Sat, 11 Apr 2020 19:14:42 -0400 Message-Id: <20200411231447.27182-12-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200411231447.27182-1-sashal@kernel.org> References: <20200411231447.27182-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: James Smart [ Upstream commit 39c4f1a965a9244c3ba60695e8ff8da065ec6ac4 ] The driver is occasionally seeing the following SLI Port error, requiring reset and reinit: Port Status Event: ... error 1=0x52004a01, error 2=0x218 The failure means an RQ timeout. That is, the adapter had received asynchronous receive frames, ran out of buffer slots to place the frames, and the driver did not replenish the buffer slots before a timeout occurred. The driver should not be so slow in replenishing buffers that a timeout can occur. When the driver received all the frames of a sequence, it allocates an IOCB to put the frames in. In a situation where there was no IOCB available for the frame of a sequence, the RQ buffer corresponding to the first frame of the sequence was not returned to the FW. Eventually, with enough traffic encountering the situation, the timeout occurred. Fix by releasing the buffer back to firmware whenever there is no IOCB for the first frame. [mkp: typo] Link: https://lore.kernel.org/r/20200128002312.16346-2-jsmart2021@gmail.com Signed-off-by: Dick Kennedy Signed-off-by: James Smart Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/lpfc/lpfc_sli.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c index 065fdc17bbfbb..0b2c6e0f0de59 100644 --- a/drivers/scsi/lpfc/lpfc_sli.c +++ b/drivers/scsi/lpfc/lpfc_sli.c @@ -15443,6 +15443,10 @@ lpfc_prep_seq(struct lpfc_vport *vport, struct hbq_dmabuf *seq_dmabuf) list_add_tail(&iocbq->list, &first_iocbq->list); } } + /* Free the sequence's header buffer */ + if (!first_iocbq) + lpfc_in_buf_free(vport->phba, &seq_dmabuf->dbuf); + return first_iocbq; } -- 2.20.1