From: Logan Gunthorpe <logang@deltatee.com>
Date: Tue, 10 Sep 2019 13:58:33 -0600
Subject: PCI/switchtec: Read all 64 bits of part_event_bitmap
Git-commit: 6acdf7e19b37cb3a9258603d0eab315079c19c5e
Patch-mainline: 5.5-rc1
References: git-fixes

The part_event_bitmap register is 64 bits wide, so read it with ioread64()
instead of the 32-bit ioread32().

[js] include also linux/io-64-nonatomic-lo-hi.h, it was added later

Fixes: 52eabba5bcdb ("switchtec: Add IOCTLs to the Switchtec driver")
Link: https://lore.kernel.org/r/20190910195833.3891-1-logang@deltatee.com
Reported-by: Doug Meyer <dmeyer@gigaio.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org	# v4.12+
Cc: Kelvin Cao <Kelvin.Cao@microchip.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/pci/switch/switchtec.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -24,6 +24,7 @@
 #include <linux/cdev.h>
 #include <linux/wait.h>
 
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/nospec.h>
 
 MODULE_DESCRIPTION("Microsemi Switchtec(tm) PCIe Management Driver");
@@ -876,7 +877,7 @@ static int ioctl_event_summary(struct sw
 	u32 reg;
 
 	s.global = ioread32(&stdev->mmio_sw_event->global_summary);
-	s.part_bitmap = ioread32(&stdev->mmio_sw_event->part_event_bitmap);
+	s.part_bitmap = ioread64(&stdev->mmio_sw_event->part_event_bitmap);
 	s.local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
 
 	for (i = 0; i < stdev->partition_count; i++) {