From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dhcp-26-207.brq.redhat.com (unknown [89.24.186.221]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 6BC3F2C007E for ; Thu, 3 Oct 2013 02:46:06 +1000 (EST) From: Alexander Gordeev To: linux-kernel@vger.kernel.org Subject: [PATCH RFC 46/77] mlx4: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:49:02 +0200 Message-Id: In-Reply-To: References: Cc: linux-mips@linux-mips.org, "VMware, Inc." , linux-nvme@lists.infradead.org, linux-ide@vger.kernel.org, linux-s390@vger.kernel.org, Andy King , linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org, x86@kernel.org, Alexander Gordeev , linux-pci@vger.kernel.org, iss_storagedev@hp.com, linux-driver@qlogic.com, Tejun Heo , Bjorn Helgaas , Dan Williams , Jon Mason , Ingo Molnar , Solarflare linux maintainers , netdev@vger.kernel.org, Ralf Baechle , e1000-devel@lists.sourceforge.net, Martin Schwidefsky , linux390@de.ibm.com, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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/mellanox/mlx4/main.c | 17 ++++++++--------- 1 files changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index 60c9f4f..377a5ea 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -1852,8 +1852,16 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev) int i; if (msi_x) { + err = pci_msix_table_size(dev->pdev); + if (err < 0) + goto no_msi; + + /* Try if at least 2 vectors are available */ nreq = min_t(int, dev->caps.num_eqs - dev->caps.reserved_eqs, nreq); + nreq = min_t(int, nreq, err); + if (nreq < 2) + goto no_msi; entries = kcalloc(nreq, sizeof *entries, GFP_KERNEL); if (!entries) @@ -1862,17 +1870,8 @@ static void mlx4_enable_msi_x(struct mlx4_dev *dev) for (i = 0; i < nreq; ++i) entries[i].entry = i; - retry: err = pci_enable_msix(dev->pdev, entries, nreq); if (err) { - /* Try again if at least 2 vectors are available */ - if (err > 1) { - mlx4_info(dev, "Requested %d vectors, " - "but only %d MSI-X vectors available, " - "trying again\n", nreq, err); - nreq = err; - goto retry; - } kfree(entries); goto no_msi; } -- 1.7.7.6