From patchwork Wed Apr 1 16:16:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 228494 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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, 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 72110C43331 for ; Wed, 1 Apr 2020 16:26:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 139E421924 for ; Wed, 1 Apr 2020 16:26:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758407; bh=OtpKH4sa7WjFFEqXU6hQbOx0/zIIZm3na15gYI4GVjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1J95O010RyNeumRmXOhoyPxTzXMf0/shU3lTCniWDgUUv8zFUvjBXI6yf/JV6dZbM WOOudc2wliVQ2UjyueH7Vj6LHjt62M6BORFr1z7Q+PzLtqCDQON657gXlkA3VeNtNe JcnLg0zYKoSnh3QwwrviKTBvWyxvJQt3/M3UOi1c= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387913AbgDAQ0i (ORCPT ); Wed, 1 Apr 2020 12:26:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:51180 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387430AbgDAQ0i (ORCPT ); Wed, 1 Apr 2020 12:26:38 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 76DDF20BED; Wed, 1 Apr 2020 16:26:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585758397; bh=OtpKH4sa7WjFFEqXU6hQbOx0/zIIZm3na15gYI4GVjY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=H4hPXpoJUxNIYwW2H07HKvNUBj22hvMAB61vGX8ff0Hl29f1y9Zhs0JNF/e2gxRHJ nOLhOSYIXJsBuLE5urOEVldZLZ0aTVV/GEyLcolR0RLIpUhXwvVNacKleseFxA0lL3 HopnGZHHJt4/Brd76QVgKSPUCOn0go6tZUk9sljw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Julian Wiedmann , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 041/116] s390/qeth: handle error when backing RX buffer Date: Wed, 1 Apr 2020 18:16:57 +0200 Message-Id: <20200401161547.682969526@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200401161542.669484650@linuxfoundation.org> References: <20200401161542.669484650@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Julian Wiedmann [ Upstream commit 17413852804d7e86e6f0576cca32c1541817800e ] qeth_init_qdio_queues() fills the RX ring with an initial set of RX buffers. If qeth_init_input_buffer() fails to back one of the RX buffers with memory, we need to bail out and report the error. Fixes: 4a71df50047f ("qeth: new qeth device driver") Signed-off-by: Julian Wiedmann Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/s390/net/qeth_core_main.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index d99bfbfcafb76..5f59e2dfc7db9 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -2811,12 +2811,12 @@ static int qeth_init_input_buffer(struct qeth_card *card, buf->rx_skb = netdev_alloc_skb(card->dev, QETH_RX_PULL_LEN + ETH_HLEN); if (!buf->rx_skb) - return 1; + return -ENOMEM; } pool_entry = qeth_find_free_buffer_pool_entry(card); if (!pool_entry) - return 1; + return -ENOBUFS; /* * since the buffer is accessed only from the input_tasklet @@ -2848,10 +2848,15 @@ int qeth_init_qdio_queues(struct qeth_card *card) /* inbound queue */ qdio_reset_buffers(card->qdio.in_q->qdio_bufs, QDIO_MAX_BUFFERS_PER_Q); memset(&card->rx, 0, sizeof(struct qeth_rx)); + qeth_initialize_working_pool_list(card); /*give only as many buffers to hardware as we have buffer pool entries*/ - for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; ++i) - qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]); + for (i = 0; i < card->qdio.in_buf_pool.buf_count - 1; i++) { + rc = qeth_init_input_buffer(card, &card->qdio.in_q->bufs[i]); + if (rc) + return rc; + } + card->qdio.in_q->next_buf_to_init = card->qdio.in_buf_pool.buf_count - 1; rc = do_QDIO(CARD_DDEV(card), QDIO_FLAG_SYNC_INPUT, 0, 0,