From patchwork Wed Oct 2 10:48:29 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 279927 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 9B95F2C063E for ; Thu, 3 Oct 2013 03:13:20 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754279Ab3JBRM6 (ORCPT ); Wed, 2 Oct 2013 13:12:58 -0400 Received: from 221-186-24-89.in-addr.arpa ([89.24.186.221]:25820 "EHLO dhcp-26-207.brq.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753385Ab3JBRM4 (ORCPT ); Wed, 2 Oct 2013 13:12:56 -0400 Received: from dhcp-26-207.brq.redhat.com (localhost [127.0.0.1]) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5) with ESMTP id r92ArOeZ002435; Wed, 2 Oct 2013 12:53:25 +0200 Received: (from agordeev@localhost) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5/Submit) id r92ArJ6E002434; Wed, 2 Oct 2013 12:53:19 +0200 From: Alexander Gordeev To: linux-kernel@vger.kernel.org Cc: Alexander Gordeev , Bjorn Helgaas , Ralf Baechle , Michael Ellerman , Benjamin Herrenschmidt , Martin Schwidefsky , Ingo Molnar , Tejun Heo , Dan Williams , Andy King , Jon Mason , Matt Porter , linux-pci@vger.kernel.org, linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org, linux390@de.ibm.com, linux-s390@vger.kernel.org, x86@kernel.org, linux-ide@vger.kernel.org, iss_storagedev@hp.com, linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, e1000-devel@lists.sourceforge.net, linux-driver@qlogic.com, Solarflare linux maintainers , "VMware, Inc." , linux-scsi@vger.kernel.org Subject: [PATCH RFC 13/77] bna: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:48:29 +0200 Message-Id: X-Mailer: git-send-email 1.7.7.6 In-Reply-To: References: Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org As result of recent re-design of the MSI/MSI-X interrupts enabling pattern this driver has to be updated to use the new technique to obtain a optimal number of MSI/MSI-X interrupts required. Signed-off-by: Alexander Gordeev --- drivers/net/ethernet/brocade/bna/bnad.c | 34 ++++++++++++------------------ 1 files changed, 14 insertions(+), 20 deletions(-) diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c index b78e69e..d41257c 100644 --- a/drivers/net/ethernet/brocade/bna/bnad.c +++ b/drivers/net/ethernet/brocade/bna/bnad.c @@ -2469,21 +2469,11 @@ bnad_enable_msix(struct bnad *bnad) if (bnad->msix_table) return; - bnad->msix_table = - kcalloc(bnad->msix_num, sizeof(struct msix_entry), GFP_KERNEL); - - if (!bnad->msix_table) + ret = pci_msix_table_size(bnad->pcidev); + if (ret < 0) goto intx_mode; - for (i = 0; i < bnad->msix_num; i++) - bnad->msix_table[i].entry = i; - - ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, bnad->msix_num); - if (ret > 0) { - /* Not enough MSI-X vectors. */ - pr_warn("BNA: %d MSI-X vectors allocated < %d requested\n", - ret, bnad->msix_num); - + if (ret < bnad->msix_num) { spin_lock_irqsave(&bnad->bna_lock, flags); /* ret = #of vectors that we got */ bnad_q_num_adjust(bnad, (ret - BNAD_MAILBOX_MSIX_VECTORS) / 2, @@ -2495,15 +2485,19 @@ bnad_enable_msix(struct bnad *bnad) if (bnad->msix_num > ret) goto intx_mode; + } - /* Try once more with adjusted numbers */ - /* If this fails, fall back to INTx */ - ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, - bnad->msix_num); - if (ret) - goto intx_mode; + bnad->msix_table = + kcalloc(bnad->msix_num, sizeof(struct msix_entry), GFP_KERNEL); + + if (!bnad->msix_table) + goto intx_mode; - } else if (ret < 0) + for (i = 0; i < bnad->msix_num; i++) + bnad->msix_table[i].entry = i; + + ret = pci_enable_msix(bnad->pcidev, bnad->msix_table, bnad->msix_num); + if (ret) goto intx_mode; pci_intx(bnad->pcidev, 0);