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authorChing Huang2017-12-05 10:24:01 +0800
committerMartin K. Petersen2017-12-06 19:32:41 -0500
commita18686eb970c7be6002e23504ecb2419dac0144c (patch)
tree0325f82b1431125f43ac6b6941ee048f460d3dd0 /drivers
parent852c3f3240d147044158e2991efe83f3d8f82337 (diff)
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: Ching Huang <ching2048@areca.com.tw> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/arcmsr/arcmsr_hba.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 52f8e1cfd10c..367904fb7cdf 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 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 +835,17 @@ arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb)
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);
+ 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)
return FAILED;
-
+msi_int1:
flags = IRQF_SHARED;
}