From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from szxga01-in.huawei.com ([119.145.14.64]:17135 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753387AbaGHCJV (ORCPT ); Mon, 7 Jul 2014 22:09:21 -0400 From: Yijing Wang To: Bjorn Helgaas CC: , Wuyun , Yijing Wang Subject: [PATCH v3 4/6] PCI/MSI: Retrieve first MSI irq from msi_desc rather than pci_dev Date: Tue, 8 Jul 2014 10:08:55 +0800 Message-ID: <1404785335-4792-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-pci-owner@vger.kernel.org List-ID: Retrieve the first MSi irq to compute the MSI index from struct msi_desc rather than the pci device, avoid a additional memory access. Signed-off-by: Yijing Wang --- drivers/pci/msi.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 86578bb..7f803e9 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -235,7 +235,7 @@ static void msi_set_mask_bit(struct irq_data *data, u32 flag) msix_mask_irq(desc, flag); readl(desc->mask_base); /* Flush write to device */ } else { - unsigned offset = data->irq - desc->dev->irq; + unsigned offset = data->irq - desc->irq; msi_mask_irq(desc, 1 << offset, flag << offset); } } -- 1.7.1