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authorChing Huang <ching2048@areca.com.tw>2017-12-05 05:26:38 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-12-07 03:32:41 +0300
commit07640404bda59a6be3dea4ed2b9e6330c809112b (patch)
tree7f0d77ded17db9dcb4f1cd429d8befd5dcdb02fc /drivers
parenta18686eb970c7be6002e23504ecb2419dac0144c (diff)
downloadlinux-07640404bda59a6be3dea4ed2b9e6330c809112b.tar.xz
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 <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.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 367904fb7cdf..6d165e5fef15 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) {