From patchwork Tue Jan 10 01:55:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shin'ichiro Kawasaki X-Patchwork-Id: 13094595 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 726D3C54EBD for ; Tue, 10 Jan 2023 01:55:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229445AbjAJBzo (ORCPT ); Mon, 9 Jan 2023 20:55:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229762AbjAJBzn (ORCPT ); Mon, 9 Jan 2023 20:55:43 -0500 Received: from esa2.hgst.iphmx.com (esa2.hgst.iphmx.com [68.232.143.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6EC913F23 for ; Mon, 9 Jan 2023 17:55:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1673315741; x=1704851741; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8QTa+ZXhS+gfABgWpDdnMlCj5JOX+WkkogmapTpAIVY=; b=m9F1vtQwAlx5HoK8an2+AGWgNLuJFPFZosWuPh7HQtwBx04QQ4BZhzGi MYIcsJ+T57SnCDTbp8oOmGnQeO4pIE+NTNDnEYTE0/f5NcTuKxw24Rv3I MU/0X4puUsitjTIs2Lz8IKPz1EukFCdsG3UpeXA+vuY5DtO3Ckso7piU+ HXtfLowbwZd3zzq2MgTWx64DozEF3BzAxtamQ+h9kbcueIBHY2iZzsb2X CjMM9149nSI9Ureg7cTU2zBA1iGBerRENsYc7wlF8j9dxo2Qq4GG7tu/I TG7J/vQpPNOsJWNtBIeqHYpmV/j1yfv1i1lSRAk1tcJIps+FxsgD58KUQ g==; X-IronPort-AV: E=Sophos;i="5.96,313,1665417600"; d="scan'208";a="324698278" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 10 Jan 2023 09:55:41 +0800 IronPort-SDR: lvFwycepLoOYg1vUoQ3UPWdg5CZ5lMrjEWNNbEbd4Uyatu0mEA9Rn65GHyvPiSBYAshzzqrpZu tjRtUvcP78a1J2LdK2dz+Wnaflks7IZ4buztOPGw0BjkzQUZBi4KJRZAuV7mNCDpOEMoCRrHzu 4BUmyKmtFL8aPZ7Xjh8Mt/XU0rxcO6o+vPpbsTBSBdbwnO3wIRg+GfUJ11e7m+vs0bSJS4yVDa kUQny6NJX8PbO9EMAiy9x2BmCUfUV+z4UXl60/vlN1jEkh3vCOgzC1fH67EX8xq4AwdOU9bFpO a8o= Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 09 Jan 2023 17:07:47 -0800 IronPort-SDR: KnfoTVmeQn5zM7HhfV1U6wSdrWPqDnTpj0nWkg3vAPR4WtnOzOv8X+4JoTUEd4Rgy+uH3MSFBx 5eDhxzoIy63cJTcCfzLPfie7sPclUBleDmMcvvpyHVT10ye05s+4sTGi0jBirVgbVLZv1Th9Hh QJR1XQjumkLnKOSILF6uCi1v/ooAnDBhW+xrIXU98G3lxz8Z/rpf3WX00E8mHFQ50K1UnAp6+R q7SmtZ2626EXbkE/itK4XXqxbyo+k4/YWmHyUs000t4fC5gAuZx12MBGrLCxJ8bFhg20XBlugK TM8= WDCIronportException: Internal Received: from shindev.dhcp.fujisawa.hgst.com (HELO shindev.fujisawa.hgst.com) ([10.149.52.207]) by uls-op-cesaip02.wdc.com with ESMTP; 09 Jan 2023 17:55:41 -0800 From: Shin'ichiro Kawasaki To: linux-scsi@vger.kernel.org, mpi3mr-linuxdrv.pdl@broadcom.com Cc: Sathya Prakash Veerichetty , Kashyap Desai , Sumit Saxena , Sreekanth Reddy , "Martin K . Petersen" , Damien Le Moal , Shin'ichiro Kawasaki Subject: [PATCH v3 1/5] scsi: mpi3mr: remove unnecessary memcpy Date: Tue, 10 Jan 2023 10:55:34 +0900 Message-Id: <20230110015538.201332-2-shinichiro.kawasaki@wdc.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20230110015538.201332-1-shinichiro.kawasaki@wdc.com> References: <20230110015538.201332-1-shinichiro.kawasaki@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org In the function mpi3mr_get_all_tgt_info, devmap_info points to alltgt_info->dmi then there is no need to memcpy data from devmap_info to alltgt_info->dmi. Remove the unnecessary memcpy. This also allows to remove the local variable 'rval' and the goto label 'out'. Fixes: f5e6d5a34376 ("scsi: mpi3mr: Add support for driver commands") Cc: stable@vger.kernel.org Signed-off-by: Shin'ichiro Kawasaki --- drivers/scsi/mpi3mr/mpi3mr_app.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/mpi3mr/mpi3mr_app.c b/drivers/scsi/mpi3mr/mpi3mr_app.c index 9baac224b213..5bbfdff70570 100644 --- a/drivers/scsi/mpi3mr/mpi3mr_app.c +++ b/drivers/scsi/mpi3mr/mpi3mr_app.c @@ -293,7 +293,6 @@ static long mpi3mr_bsg_pel_enable(struct mpi3mr_ioc *mrioc, static long mpi3mr_get_all_tgt_info(struct mpi3mr_ioc *mrioc, struct bsg_job *job) { - long rval = -EINVAL; u16 num_devices = 0, i = 0, size; unsigned long flags; struct mpi3mr_tgt_dev *tgtdev; @@ -304,7 +303,7 @@ static long mpi3mr_get_all_tgt_info(struct mpi3mr_ioc *mrioc, if (job->request_payload.payload_len < sizeof(u32)) { dprint_bsg_err(mrioc, "%s: invalid size argument\n", __func__); - return rval; + return -EINVAL; } spin_lock_irqsave(&mrioc->tgtdev_lock, flags); @@ -349,20 +348,12 @@ static long mpi3mr_get_all_tgt_info(struct mpi3mr_ioc *mrioc, usr_entrylen = (job->request_payload.payload_len - sizeof(u32)) / sizeof(*devmap_info); usr_entrylen *= sizeof(*devmap_info); min_entrylen = min(usr_entrylen, kern_entrylen); - if (min_entrylen && (!memcpy(&alltgt_info->dmi, devmap_info, min_entrylen))) { - dprint_bsg_err(mrioc, "%s:%d: device map info copy failed\n", - __func__, __LINE__); - rval = -EFAULT; - goto out; - } sg_copy_from_buffer(job->request_payload.sg_list, job->request_payload.sg_cnt, alltgt_info, job->request_payload.payload_len); - rval = 0; -out: kfree(alltgt_info); - return rval; + return 0; } /** * mpi3mr_get_change_count - Get topology change count