[PATCH v4] smartpqi: add module parameter disable_managed_interrupts

[Don Brace <don.brace@microchip.com>]

Add in a description for module parameter disable_managed_interrupts.

This module parameter allows users to disable automatic irq affinity
setting by turning off the PCI_IRQ_AFFINITY flag when requesting
interrupts.

When the flag PCI_IRQ_AFFINITY is set, users cannot change the interrupt
affinity through /proc/irq/<irq#>/*affinity*

Some customers would like to change interrupt affinity based on their
requirements.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
 man4/smartpqi.4 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/man4/smartpqi.4 b/man4/smartpqi.4
index 428d79a19840..613ef330aef1 100644
--- a/man4/smartpqi.4
+++ b/man4/smartpqi.4
@@ -16,6 +16,7 @@ smartpqi \- Microchip Smart Storage SCSI driver
 .RB [ lockup_action= { none | reboot | panic }]
 .RB [ expose_ld_first= { 0 | 1 }]
 .RB [ hide_vsep= { 0 | 1 }]
+.RB [ disable_managed_interrupts= { 0 | 1 }]
 .YS
 .SH DESCRIPTION
 .B smartpqi
@@ -100,6 +101,12 @@ The default value is 0 (physical devices exposed first).
 .BR hide_vsep= { 0 | 1 }
 This option disables exposure of the virtual SEP to the OS.
 The default value is 0 (virtual SEP is exposed).
+.TP
+.BR disable_managed_interrupts= { 0 | 1 }
+Disables driver utilization of Linux kernel managed interrupts for
+controllers. The managed interrupts feature automatically distributes
+interrupts to all available CPUs and assigns SMP affinity.
+The default value is 0 (managed interrupts enabled).
 .SH FILES
 .SS Device nodes
 Logical drives are accessed via the SCSI disk driver
-- 
2.42.0.158.g94e83dcf5b