From: Ching Huang <ching2048@xxxxxxxxxxxx>
Add module parameter msi_enable to has a chance to disable msi interrupt if it does not work properly.
Signed-off-by: Ching Huang <ching2048@xxxxxxxxxxxx>
---
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
--- a/drivers/scsi/arcmsr/arcmsr_hba.c 2017-11-23 14:29:26.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2017-11-23 16:02:28.000000000 +0800
@@ -75,6 +75,10 @@ MODULE_DESCRIPTION("Areca ARC11xx/12xx/1
MODULE_LICENSE("Dual BSD/GPL");
MODULE_VERSION(ARCMSR_DRIVER_VERSION);
+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)");
+
static int host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD;
module_param(host_can_queue, int, S_IRUGO);
MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 128");
@@ -831,11 +835,15 @@ arcmsr_request_irq(struct pci_dev *pdev,
pr_info("arcmsr%d: msi-x enabled\n", acb->host->host_no);
flags = 0;
} else {
- nvec = pci_alloc_irq_vectors(pdev, 1, 1,
- PCI_IRQ_MSI | PCI_IRQ_LEGACY);
+ if (msi_enable == 1)
+ nvec = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);
+ else
+ nvec = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_LEGACY);
if (nvec < 1)
return FAILED;
+ if (msi_enable == 1)
+ pr_info("arcmsr%d: msi enabled\n", acb->host->host_no);
flags = IRQF_SHARED;
}
