Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754806Ab3JBQvu (ORCPT ); Wed, 2 Oct 2013 12:51:50 -0400 Received: from 221-186-24-89.in-addr.arpa ([89.24.186.221]:24846 "EHLO dhcp-26-207.brq.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754770Ab3JBQvp (ORCPT ); Wed, 2 Oct 2013 12:51:45 -0400 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 21/77] csiostor: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:48:37 +0200 Message-Id: X-Mailer: git-send-email 1.7.7.6 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1865 Lines: 60 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/scsi/csiostor/csio_isr.c | 18 ++++++++++++------ 1 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/csiostor/csio_isr.c b/drivers/scsi/csiostor/csio_isr.c index abf20ab..b8a840e 100644 --- a/drivers/scsi/csiostor/csio_isr.c +++ b/drivers/scsi/csiostor/csio_isr.c @@ -512,6 +512,16 @@ csio_enable_msix(struct csio_hw *hw) if (hw->flags & CSIO_HWF_USING_SOFT_PARAMS || !csio_is_hw_master(hw)) cnt = min_t(uint8_t, hw->cfg_niq, cnt); + rv = pci_msix_table_size(hw->pdev); + if (rv < 0) + return rv; + + cnt = min(cnt, rv); + if (cnt < min) { + csio_info(hw, "Not using MSI-X, remainder:%d\n", rv); + return -ENOSPC; + } + entries = kzalloc(sizeof(struct msix_entry) * cnt, GFP_KERNEL); if (!entries) return -ENOMEM; @@ -521,19 +531,15 @@ csio_enable_msix(struct csio_hw *hw) csio_dbg(hw, "FW supp #niq:%d, trying %d msix's\n", hw->cfg_niq, cnt); - while ((rv = pci_enable_msix(hw->pdev, entries, cnt)) >= min) - cnt = rv; + rv = pci_enable_msix(hw->pdev, entries, cnt); if (!rv) { if (cnt < (hw->num_sqsets + extra)) { csio_dbg(hw, "Reducing sqsets to %d\n", cnt - extra); csio_reduce_sqsets(hw, cnt - extra); } } else { - if (rv > 0) - csio_info(hw, "Not using MSI-X, remainder:%d\n", rv); - kfree(entries); - return -ENOSPC; + return rv; } /* Save off vectors */ -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/