From 07640404bda59a6be3dea4ed2b9e6330c809112b Mon Sep 17 00:00:00 2001 From: Ching Huang Date: Tue, 5 Dec 2017 10:26:38 +0800 Subject: [PATCH] scsi: arcmsr: Add driver module parameter msix_enable Add module parameter msix_enable so user has the option of disabling MSI-X interrupts if there is a platform problem. Signed-off-by: Ching Huang Signed-off-by: Martin K. Petersen --- drivers/scsi/arcmsr/arcmsr_hba.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 367904f..6d165e5 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -75,6 +75,10 @@ MODULE_DESCRIPTION("Areca ARC11xx/12xx/16xx/188x SAS/SATA RAID Controller Driver 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, struct AdapterControlBlock *acb) 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) { -- 2.7.4