From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE8EA14374F; Thu, 13 Jun 2024 12:35:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282115; cv=none; b=cxI+db8N9QBKuuIsBmPKU1TOiZDIIZOg5Xs1y72jYUwxJoP872Jt/1WpIPxmQEaBCs4WiBl3EUIy+pbr/z0cSTWLRatuJfmJ8Py68iWIW7+BQ8n3N1oWhP3kJcFAqPqbdTr2OVrLppv5B6AfWf7A+zzHt4OC2XDBwF4npMa5+24= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282115; c=relaxed/simple; bh=cru/ZOCuNRNj/tnQn/u9r38188JQaZEwH8G7+xJY21c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sPB5EelLF8yu6k2JZ82SeasyjBOprkh8mpNKJ0bwKd1eOjcGsM3xR59pRMIWuJMuS0UUZKFIbql6xmZc0b9Xw1vkImV/VOMwKwm4kGGe/XqHQy5dsKLxkJ/5vGbz+3lON0i9s1wbkANX6BwuQsCEhYcGjMHYlqk65jgteNeFo9c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=BA0eLkM0; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="BA0eLkM0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7AD1FC4AF4D; Thu, 13 Jun 2024 12:35:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718282114; bh=cru/ZOCuNRNj/tnQn/u9r38188JQaZEwH8G7+xJY21c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BA0eLkM0+PO9V+aWRJX4nOQti5UuC5Zysj0/7jOB9QxeMxrDy+niV4uSDIHMJ2giM LdmVr6zurzpa3dwOM8pUBbUnROea1f9tqDzbwgOOW6UggICxxI+u6UBUUvIGBfEqLm 9Ak8WrbqDSmJ+1hBbus9UPflYqYz3Yjs1KTPwy6A= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhengchao Shao , Junxian Huang , Leon Romanovsky , Sasha Levin Subject: [PATCH 5.15 150/402] RDMA/hns: Fix return value in hns_roce_map_mr_sg Date: Thu, 13 Jun 2024 13:31:47 +0200 Message-ID: <20240613113307.987016297@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240613113302.116811394@linuxfoundation.org> References: <20240613113302.116811394@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhengchao Shao [ Upstream commit 203b70fda63425a4eb29f03f9074859afe821a39 ] As described in the ib_map_mr_sg function comment, it returns the number of sg elements that were mapped to the memory region. However, hns_roce_map_mr_sg returns the number of pages required for mapping the DMA area. Fix it. Fixes: 9b2cf76c9f05 ("RDMA/hns: Optimize PBL buffer allocation process") Signed-off-by: Zhengchao Shao Link: https://lore.kernel.org/r/20240411033851.2884771-1-shaozhengchao@huawei.com Reviewed-by: Junxian Huang Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_mr.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c index 12c482f4a1c48..7106e51d5fad1 100644 --- a/drivers/infiniband/hw/hns/hns_roce_mr.c +++ b/drivers/infiniband/hw/hns/hns_roce_mr.c @@ -444,18 +444,18 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, struct ib_device *ibdev = &hr_dev->ib_dev; struct hns_roce_mr *mr = to_hr_mr(ibmr); struct hns_roce_mtr *mtr = &mr->pbl_mtr; - int ret = 0; + int ret, sg_num = 0; mr->npages = 0; mr->page_list = kvcalloc(mr->pbl_mtr.hem_cfg.buf_pg_count, sizeof(dma_addr_t), GFP_KERNEL); if (!mr->page_list) - return ret; + return sg_num; - ret = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page); - if (ret < 1) { + sg_num = ib_sg_to_pages(ibmr, sg, sg_nents, sg_offset, hns_roce_set_page); + if (sg_num < 1) { ibdev_err(ibdev, "failed to store sg pages %u %u, cnt = %d.\n", - mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, ret); + mr->npages, mr->pbl_mtr.hem_cfg.buf_pg_count, sg_num); goto err_page_list; } @@ -466,17 +466,16 @@ int hns_roce_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, ret = hns_roce_mtr_map(hr_dev, mtr, mr->page_list, mr->npages); if (ret) { ibdev_err(ibdev, "failed to map sg mtr, ret = %d.\n", ret); - ret = 0; + sg_num = 0; } else { mr->pbl_mtr.hem_cfg.buf_pg_shift = (u32)ilog2(ibmr->page_size); - ret = mr->npages; } err_page_list: kvfree(mr->page_list); mr->page_list = NULL; - return ret; + return sg_num; } static void hns_roce_mw_free(struct hns_roce_dev *hr_dev, -- 2.43.0