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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D117C678D8 for ; Mon, 16 Jan 2023 16:07:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232515AbjAPQHj (ORCPT ); Mon, 16 Jan 2023 11:07:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232345AbjAPQHD (ORCPT ); Mon, 16 Jan 2023 11:07:03 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8575724137 for ; Mon, 16 Jan 2023 08:05:19 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 22B036104A for ; Mon, 16 Jan 2023 16:05:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30D46C433D2; Mon, 16 Jan 2023 16:05:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673885118; bh=hqmIFF6FRBevN8BnrGrGgRfs2wEOCrsDsUNJ+1Oa90I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2fL5+Zu94FEueNgevbWOYXwSh5Be+RIygj8FFrnzlcvJIe+0JR2btZCTfVmsHFCbG TeG+KddQ41bnniht46Eeoti4T0kcGkf2aKaeGp6RtupLhcsexRj0EjONe6TvsnF9Pk yBYd4wAJ97IOdKhFxt46dr05++jXkdxW02wKt4Vo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Christoph Hellwig , Sreekanth Reddy , "Martin K. Petersen" , Paul Menzel Subject: [PATCH 5.15 81/86] scsi: mpt3sas: Remove scsi_dma_map() error messages Date: Mon, 16 Jan 2023 16:51:55 +0100 Message-Id: <20230116154750.408864951@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116154747.036911298@linuxfoundation.org> References: <20230116154747.036911298@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sreekanth Reddy commit 0c25422d34b4726b2707d5f38560943155a91b80 upstream. When scsi_dma_map() fails by returning a sges_left value less than zero, the amount of logging produced can be extremely high. In a recent end-user environment, 1200 messages per second were being sent to the log buffer. This eventually overwhelmed the system and it stalled. These error messages are not needed. Remove them. Link: https://lore.kernel.org/r/20220303140203.12642-1-sreekanth.reddy@broadcom.com Suggested-by: Christoph Hellwig Signed-off-by: Sreekanth Reddy Signed-off-by: Martin K. Petersen Cc: Paul Menzel Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/mpt3sas/mpt3sas_base.c | 18 +++--------------- 1 file changed, 3 insertions(+), 15 deletions(-) --- a/drivers/scsi/mpt3sas/mpt3sas_base.c +++ b/drivers/scsi/mpt3sas/mpt3sas_base.c @@ -2594,12 +2594,8 @@ _base_check_pcie_native_sgl(struct MPT3S /* Get the SG list pointer and info. */ sges_left = scsi_dma_map(scmd); - if (sges_left < 0) { - sdev_printk(KERN_ERR, scmd->device, - "scsi_dma_map failed: request for %d bytes!\n", - scsi_bufflen(scmd)); + if (sges_left < 0) return 1; - } /* Check if we need to build a native SG list. */ if (!base_is_prp_possible(ioc, pcie_device, @@ -2706,12 +2702,8 @@ _base_build_sg_scmd(struct MPT3SAS_ADAPT sg_scmd = scsi_sglist(scmd); sges_left = scsi_dma_map(scmd); - if (sges_left < 0) { - sdev_printk(KERN_ERR, scmd->device, - "scsi_dma_map failed: request for %d bytes!\n", - scsi_bufflen(scmd)); + if (sges_left < 0) return -ENOMEM; - } sg_local = &mpi_request->SGL; sges_in_segment = ioc->max_sges_in_main_message; @@ -2854,12 +2846,8 @@ _base_build_sg_scmd_ieee(struct MPT3SAS_ sg_scmd = scsi_sglist(scmd); sges_left = scsi_dma_map(scmd); - if (sges_left < 0) { - sdev_printk(KERN_ERR, scmd->device, - "scsi_dma_map failed: request for %d bytes!\n", - scsi_bufflen(scmd)); + if (sges_left < 0) return -ENOMEM; - } sg_local = &mpi_request->SGL; sges_in_segment = (ioc->request_sz -