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Commit a18686eb authored by Ching Huang's avatar Ching Huang Committed by Martin K. Petersen
Browse files

scsi: arcmsr: Add driver module parameter msi_enable 



Add module parameter msi_enable so user has the option of disabling MSI
interrupts if there is a platform problem.

Signed-off-by: default avatarChing Huang <ching2048@areca.com.tw>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 852c3f32

drivers/scsi/arcmsr/arcmsr_hba.c

+13 −3
Original line number Original line Diff line number Diff line
@@ -75,6 +75,10 @@ MODULE_DESCRIPTION("Areca ARC11xx/12xx/16xx/188x SAS/SATA RAID Controller Driver 
MODULE_LICENSE("Dual BSD/GPL");

MODULE_LICENSE("Dual BSD/GPL");

MODULE_VERSION(ARCMSR_DRIVER_VERSION);

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;

static int host_can_queue = ARCMSR_DEFAULT_OUTSTANDING_CMD;

module_param(host_can_queue, int, S_IRUGO);

module_param(host_can_queue, int, S_IRUGO);

MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 128");

MODULE_PARM_DESC(host_can_queue, " adapter queue depth(32 ~ 1024), default is 128");
@@ -831,11 +835,17 @@ arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb) 
		pr_info("arcmsr%d: msi-x enabled\n", acb->host->host_no);

		pr_info("arcmsr%d: msi-x enabled\n", acb->host->host_no);

		flags = 0;

		flags = 0;

	} else {

	} else {

		nvec = pci_alloc_irq_vectors(pdev, 1, 1,

		if (msi_enable == 1) {

				PCI_IRQ_MSI | PCI_IRQ_LEGACY);

			nvec = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI);

			if (nvec == 1) {

				dev_info(&pdev->dev, "msi enabled\n");

				goto msi_int1;

			}

		}

		nvec = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_LEGACY);

		if (nvec < 1)

		if (nvec < 1)

			return FAILED;

			return FAILED;



msi_int1:

		flags = IRQF_SHARED;

		flags = IRQF_SHARED;

	}

	}