The PCI_IRQ_AFFINITY flag prevents customers from
changing the smp_affinity and smp_affinity_list entries.
Add a module parameter to allow this flag to be turned
off.
Reviewed-by: Scott Teel <scott.t...@microsemi.com>
Reviewed-by: Murthy Bhat <murthy.b...@microsemi.com>
Reviewed-by: Mahesh Rajashekhara <mahesh.rajashekh...@microsemi.com>
Reviewed-by: Dave Carroll <david.carr...@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barn...@microsemi.com>
Signed-off-by: Don Brace <don.br...@microsemi.com>
---
drivers/scsi/smartpqi/smartpqi_init.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c
b/drivers/scsi/smartpqi/smartpqi_init.c
index 2f2a07a38dad..f9812281988c 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -144,6 +144,11 @@ MODULE_PARM_DESC(lockup_action, "Action to take when
controller locked up.\n"
"\t\tSupported: none, reboot, panic\n"
"\t\tDefault: none");
+static bool pqi_disable_irq_affinity;
+module_param(pqi_disable_irq_affinity, bool, 0644);
+MODULE_PARM_DESC(pqi_disable_irq_affinity,
+ "\t\tTurn off managed irq affinity. Allows smp_affinity to be
changed.");
+
static char *raid_levels[] = {
"RAID-0",
"RAID-4",
@@ -3276,10 +3281,14 @@ static void pqi_free_irqs(struct pqi_ctrl_info
*ctrl_info)
static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
{
int num_vectors_enabled;
+ unsigned int flags = PCI_IRQ_MSIX;
+
+ if (!pqi_disable_irq_affinity)
+ flags |= PCI_IRQ_AFFINITY;
num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev,
PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups,
- PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
+ flags);
if (num_vectors_enabled < 0) {
dev_err(&ctrl_info->pci_dev->dev,
"MSI-X init failed with error %d\n",
@@ -5507,7 +5516,11 @@ static int pqi_map_queues(struct Scsi_Host *shost)
{
struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
- return blk_mq_pci_map_queues(&shost->tag_set, ctrl_info->pci_dev, 0);
+ if (!pqi_disable_irq_affinity)
+ return blk_mq_pci_map_queues(&shost->tag_set,
+ ctrl_info->pci_dev, 0);
+ else
+ return 0;
}
static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info,
