Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753198AbdLEK0v (ORCPT ); Tue, 5 Dec 2017 05:26:51 -0500 Received: from mail-it0-f66.google.com ([209.85.214.66]:39689 "EHLO mail-it0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752773AbdLEK0r (ORCPT ); Tue, 5 Dec 2017 05:26:47 -0500 X-Google-Smtp-Source: AGs4zMY1FJhw2VqwvbbbV8z7IhuusWPV89E48zwL8DBzj+iq5zu86Vqu5awaZ42FvdmcA6XGvNXHwQ== Subject: [PATCH 16/17] scsi: arcmsr: Add driver module parameter msix_enable From: Ching Huang To: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: James.Bottomley@HansenPartnership.com, sfr@canb.auug.org.au Content-Type: text/plain; charset="UTF-8" Date: Tue, 05 Dec 2017 10:26:38 +0800 Message-ID: <1512440798.4577.83.camel@Centos6.3-64> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-37.el6) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1399 Lines: 40 From: Ching Huang Add module parameter msix_enable to has a chance to disable msix interrupt if between controller and system has msix INT compatible issue. Signed-off-by: Ching Huang --- diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c --- a/drivers/scsi/arcmsr/arcmsr_hba.c 2017-12-05 16:59:58.000000000 +0800 +++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2017-12-05 17:04:52.000000000 +0800 @@ -75,6 +75,10 @@ MODULE_DESCRIPTION("Areca ARC11xx/12xx/1 MODULE_LICENSE("Dual BSD/GPL"); MODULE_VERSION(ARCMSR_DRIVER_VERSION); +static int msix_enable = 1; +module_param(msix_enable, int, S_IRUGO); +MODULE_PARM_DESC(msix_enable, "Enable MSI-X interrupt(0 ~ 1), msix_enable=1(enable), =0(disable)"); + static int msi_enable = 1; module_param(msi_enable, int, S_IRUGO); MODULE_PARM_DESC(msi_enable, "Enable MSI interrupt(0 ~ 1), msi_enable=1(enable), =0(disable)"); @@ -829,12 +833,15 @@ arcmsr_request_irq(struct pci_dev *pdev, unsigned long flags; int nvec, i; + if (msix_enable == 0) + goto msi_int0; nvec = pci_alloc_irq_vectors(pdev, 1, ARCMST_NUM_MSIX_VECTORS, PCI_IRQ_MSIX); if (nvec > 0) { pr_info("arcmsr%d: msi-x enabled\n", acb->host->host_no); flags = 0; } else { +msi_int0: if (msi_enable == 1) { nvec = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); if (nvec == 1) {